./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn2.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_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/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_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/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_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/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 cb71614531ba069deddebdade1f57f90be50d3de3732c63efbb92b9f6b8c62e1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:36:07,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:36:07,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:36:07,820 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:36:07,820 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:36:07,821 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:36:07,823 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:36:07,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:36:07,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:36:07,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:36:07,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:36:07,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:36:07,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:36:07,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:36:07,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:36:07,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:36:07,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:36:07,841 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:36:07,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:36:07,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:36:07,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:36:07,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:36:07,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:36:07,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:36:07,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:36:07,860 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:36:07,861 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:36:07,862 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:36:07,863 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:36:07,872 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:36:07,873 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:36:07,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:36:07,876 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:36:07,877 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:36:07,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:36:07,880 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:36:07,880 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:36:07,881 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:36:07,881 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:36:07,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:36:07,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:36:07,884 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:36:07,933 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:36:07,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:36:07,934 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:36:07,934 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:36:07,938 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:36:07,938 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:36:07,939 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:36:07,939 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:36:07,939 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:36:07,939 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:36:07,940 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:36:07,940 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:36:07,941 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:36:07,941 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:36:07,941 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:36:07,941 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:36:07,941 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:36:07,942 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:36:07,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:36:07,943 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:36:07,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:36:07,943 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:36:07,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:36:07,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:36:07,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:36:07,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:36:07,946 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:36:07,946 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:36:07,946 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:36:07,946 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:36:07,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:36:07,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:36:07,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:36:07,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:36:07,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:36:07,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:36:07,948 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:36:07,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:36:07,948 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:36:07,948 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:36:07,949 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:36:07,949 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_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb71614531ba069deddebdade1f57f90be50d3de3732c63efbb92b9f6b8c62e1 [2021-11-23 03:36:08,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:36:08,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:36:08,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:36:08,265 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:36:08,266 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:36:08,268 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-fpi/ifeqn2.c [2021-11-23 03:36:08,348 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/data/b0f9bc84e/e082d79c77fa4f38a9b0179d47273336/FLAGb5ae7dfeb [2021-11-23 03:36:08,930 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:36:08,931 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/sv-benchmarks/c/array-fpi/ifeqn2.c [2021-11-23 03:36:08,944 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/data/b0f9bc84e/e082d79c77fa4f38a9b0179d47273336/FLAGb5ae7dfeb [2021-11-23 03:36:09,290 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/data/b0f9bc84e/e082d79c77fa4f38a9b0179d47273336 [2021-11-23 03:36:09,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:36:09,295 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:36:09,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:36:09,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:36:09,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:36:09,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:36:09" (1/1) ... [2021-11-23 03:36:09,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d432a8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:09, skipping insertion in model container [2021-11-23 03:36:09,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:36:09" (1/1) ... [2021-11-23 03:36:09,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:36:09,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:36:09,523 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_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/sv-benchmarks/c/array-fpi/ifeqn2.c[589,602] [2021-11-23 03:36:09,548 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:36:09,556 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:36:09,569 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_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/sv-benchmarks/c/array-fpi/ifeqn2.c[589,602] [2021-11-23 03:36:09,578 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:36:09,592 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:36:09,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:09 WrapperNode [2021-11-23 03:36:09,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:36:09,594 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:36:09,595 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:36:09,595 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:36:09,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:09" (1/1) ... [2021-11-23 03:36:09,610 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:09" (1/1) ... [2021-11-23 03:36:09,631 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2021-11-23 03:36:09,631 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:36:09,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:36:09,632 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:36:09,632 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:36:09,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:09" (1/1) ... [2021-11-23 03:36:09,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:09" (1/1) ... [2021-11-23 03:36:09,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:09" (1/1) ... [2021-11-23 03:36:09,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:09" (1/1) ... [2021-11-23 03:36:09,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:09" (1/1) ... [2021-11-23 03:36:09,653 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:09" (1/1) ... [2021-11-23 03:36:09,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:09" (1/1) ... [2021-11-23 03:36:09,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:36:09,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:36:09,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:36:09,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:36:09,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:09" (1/1) ... [2021-11-23 03:36:09,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:36:09,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:09,689 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:36:09,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:36:09,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:36:09,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:36:09,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:36:09,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:36:09,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:36:09,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:36:09,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:36:09,801 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:36:09,803 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:36:09,963 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:36:10,013 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:36:10,013 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 03:36:10,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:36:10 BoogieIcfgContainer [2021-11-23 03:36:10,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:36:10,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:36:10,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:36:10,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:36:10,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:36:09" (1/3) ... [2021-11-23 03:36:10,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17929abd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:36:10, skipping insertion in model container [2021-11-23 03:36:10,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:09" (2/3) ... [2021-11-23 03:36:10,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17929abd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:36:10, skipping insertion in model container [2021-11-23 03:36:10,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:36:10" (3/3) ... [2021-11-23 03:36:10,025 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn2.c [2021-11-23 03:36:10,031 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:36:10,031 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:36:10,083 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:36:10,091 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 03:36:10,091 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:36:10,105 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:10,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:36:10,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:10,112 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:36:10,113 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:36:10,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:10,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1095923036, now seen corresponding path program 1 times [2021-11-23 03:36:10,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:10,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644925362] [2021-11-23 03:36:10,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:10,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:10,349 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 03:36:10,350 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:10,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644925362] [2021-11-23 03:36:10,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644925362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:36:10,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:36:10,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:36:10,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588206126] [2021-11-23 03:36:10,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:36:10,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:36:10,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:10,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:36:10,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:36:10,407 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:10,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:10,495 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2021-11-23 03:36:10,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:36:10,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 03:36:10,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:10,506 INFO L225 Difference]: With dead ends: 20 [2021-11-23 03:36:10,507 INFO L226 Difference]: Without dead ends: 10 [2021-11-23 03:36:10,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:36:10,517 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:10,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:36:10,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-23 03:36:10,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-23 03:36:10,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:10,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-11-23 03:36:10,566 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-11-23 03:36:10,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:10,566 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-11-23 03:36:10,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:10,569 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-11-23 03:36:10,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 03:36:10,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:10,570 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:36:10,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:36:10,572 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:36:10,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:10,577 INFO L85 PathProgramCache]: Analyzing trace with hash 255696374, now seen corresponding path program 1 times [2021-11-23 03:36:10,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:10,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974551924] [2021-11-23 03:36:10,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:10,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:10,637 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:36:10,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [641177988] [2021-11-23 03:36:10,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:10,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:10,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:10,648 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:10,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:36:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:10,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:36:10,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:36:10,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:36:10,817 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:10,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974551924] [2021-11-23 03:36:10,818 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:36:10,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641177988] [2021-11-23 03:36:10,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641177988] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:36:10,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:36:10,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:36:10,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144151065] [2021-11-23 03:36:10,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:36:10,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:36:10,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:10,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:36:10,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:36:10,830 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:10,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:10,923 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-11-23 03:36:10,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:36:10,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 03:36:10,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:10,941 INFO L225 Difference]: With dead ends: 21 [2021-11-23 03:36:10,941 INFO L226 Difference]: Without dead ends: 16 [2021-11-23 03:36:10,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:36:10,943 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:10,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 6 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:36:10,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-23 03:36:10,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2021-11-23 03:36:10,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:10,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-23 03:36:10,949 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-11-23 03:36:10,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:10,950 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-23 03:36:10,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:10,950 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-23 03:36:10,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:36:10,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:10,951 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:36:10,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:36:11,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:11,152 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:36:11,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:11,153 INFO L85 PathProgramCache]: Analyzing trace with hash -652476163, now seen corresponding path program 1 times [2021-11-23 03:36:11,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:11,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262492973] [2021-11-23 03:36:11,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:11,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:11,181 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:36:11,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737120601] [2021-11-23 03:36:11,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:11,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:11,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:11,184 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:11,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:36:11,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:11,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 03:36:11,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:11,331 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:36:11,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:36:11,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:36:13,059 INFO L354 Elim1Store]: treesize reduction 1087, result has 37.4 percent of original size [2021-11-23 03:36:13,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 31 case distinctions, treesize of input 263 treesize of output 738 [2021-11-23 03:36:13,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:36:13,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:36:13,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:36:13,984 INFO L354 Elim1Store]: treesize reduction 113, result has 32.7 percent of original size [2021-11-23 03:36:13,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 202 treesize of output 202 [2021-11-23 03:36:14,394 INFO L354 Elim1Store]: treesize reduction 244, result has 30.3 percent of original size [2021-11-23 03:36:14,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 836 treesize of output 798 [2021-11-23 03:36:14,620 INFO L354 Elim1Store]: treesize reduction 244, result has 30.3 percent of original size [2021-11-23 03:36:14,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 861 treesize of output 836 [2021-11-23 03:36:14,887 INFO L354 Elim1Store]: treesize reduction 227, result has 34.2 percent of original size [2021-11-23 03:36:14,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 886 treesize of output 889 [2021-11-23 03:36:15,256 INFO L354 Elim1Store]: treesize reduction 179, result has 48.1 percent of original size [2021-11-23 03:36:15,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 868 treesize of output 808 [2021-11-23 03:36:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:36:20,907 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:20,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262492973] [2021-11-23 03:36:20,907 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:36:20,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737120601] [2021-11-23 03:36:20,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737120601] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:36:20,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1303272070] [2021-11-23 03:36:20,945 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:36:20,949 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:36:20,953 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:36:20,960 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:36:20,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:36:21,132 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-23 03:36:21,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2021-11-23 03:36:21,280 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-23 03:36:21,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-23 03:36:21,334 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:36:21,341 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:36:21,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:21,461 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-23 03:36:21,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 134 [2021-11-23 03:36:21,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:21,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 36 [2021-11-23 03:36:21,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:36:21,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 65 [2021-11-23 03:36:21,616 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:36:21,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:21,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-23 03:36:21,665 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:36:21,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:21,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:21,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:36:21,821 INFO L354 Elim1Store]: treesize reduction 323, result has 15.9 percent of original size [2021-11-23 03:36:21,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 200 [2021-11-23 03:36:21,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:36:21,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:36:21,879 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:36:21,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 153 treesize of output 95 [2021-11-23 03:36:21,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:21,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:21,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:36:21,909 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:36:21,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 234 treesize of output 72 [2021-11-23 03:36:21,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:21,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:21,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:36:21,973 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:36:21,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2021-11-23 03:36:21,983 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:36:22,014 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:36:22,383 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '183#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) (* 2 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-23 03:36:22,383 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:36:22,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:36:22,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-23 03:36:22,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360049087] [2021-11-23 03:36:22,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:36:22,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:36:22,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:22,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:36:22,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:36:22,385 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:22,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:22,559 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-11-23 03:36:22,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:36:22,561 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 03:36:22,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:22,562 INFO L225 Difference]: With dead ends: 28 [2021-11-23 03:36:22,562 INFO L226 Difference]: Without dead ends: 26 [2021-11-23 03:36:22,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:36:22,564 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:22,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 18 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:36:22,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-23 03:36:22,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 14. [2021-11-23 03:36:22,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:22,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-23 03:36:22,578 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2021-11-23 03:36:22,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:22,579 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-23 03:36:22,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:22,585 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-23 03:36:22,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 03:36:22,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:22,587 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:36:22,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:36:22,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:22,800 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:36:22,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:22,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1258946262, now seen corresponding path program 2 times [2021-11-23 03:36:22,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:22,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310010757] [2021-11-23 03:36:22,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:22,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:22,863 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:36:22,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1047512210] [2021-11-23 03:36:22,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:36:22,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:22,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:22,865 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:22,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:36:22,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:36:22,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:36:22,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:36:22,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:36:23,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:36:23,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:36:23,127 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:23,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310010757] [2021-11-23 03:36:23,128 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:36:23,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047512210] [2021-11-23 03:36:23,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047512210] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:36:23,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1134146431] [2021-11-23 03:36:23,140 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:36:23,143 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:36:23,143 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:36:23,147 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:36:23,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:36:23,316 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-23 03:36:23,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-23 03:36:23,342 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 29 treesize of output 39 [2021-11-23 03:36:23,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-23 03:36:23,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:23,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:23,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:36:23,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:23,630 INFO L354 Elim1Store]: treesize reduction 318, result has 12.4 percent of original size [2021-11-23 03:36:23,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 408 treesize of output 447 [2021-11-23 03:36:23,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:23,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:36:23,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 80 [2021-11-23 03:36:23,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:23,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 153 treesize of output 83 [2021-11-23 03:36:23,921 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:36:23,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:23,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-23 03:36:23,960 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:36:24,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:24,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:24,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:36:24,098 INFO L354 Elim1Store]: treesize reduction 323, result has 15.9 percent of original size [2021-11-23 03:36:24,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 162 treesize of output 222 [2021-11-23 03:36:24,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:24,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:24,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:36:24,150 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:36:24,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 234 treesize of output 72 [2021-11-23 03:36:24,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:36:24,212 INFO L354 Elim1Store]: treesize reduction 46, result has 38.7 percent of original size [2021-11-23 03:36:24,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 153 treesize of output 124 [2021-11-23 03:36:24,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:24,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:24,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:36:24,285 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:36:24,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2021-11-23 03:36:24,296 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:36:24,326 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:36:24,638 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '313#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) (* 2 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 03:36:24,638 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:36:24,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:36:24,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-23 03:36:24,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439743786] [2021-11-23 03:36:24,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:36:24,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:36:24,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:24,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:36:24,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:36:24,641 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:24,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:24,771 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-11-23 03:36:24,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:36:24,772 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 03:36:24,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:24,772 INFO L225 Difference]: With dead ends: 35 [2021-11-23 03:36:24,773 INFO L226 Difference]: Without dead ends: 23 [2021-11-23 03:36:24,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:36:24,774 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:24,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 18 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:36:24,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-23 03:36:24,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 13. [2021-11-23 03:36:24,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:24,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-23 03:36:24,780 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2021-11-23 03:36:24,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:24,781 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-23 03:36:24,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:24,781 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-23 03:36:24,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 03:36:24,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:24,782 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:36:24,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:36:25,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:25,002 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:36:25,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:25,003 INFO L85 PathProgramCache]: Analyzing trace with hash 2034389572, now seen corresponding path program 3 times [2021-11-23 03:36:25,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:25,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602770486] [2021-11-23 03:36:25,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:25,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:25,038 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:36:25,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [860552635] [2021-11-23 03:36:25,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:36:25,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:25,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:25,055 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:25,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:36:25,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:36:25,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:36:25,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 03:36:25,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:25,259 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:36:25,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:25,299 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-11-23 03:36:25,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-11-23 03:36:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:36:25,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:36:26,990 INFO L354 Elim1Store]: treesize reduction 1087, result has 37.4 percent of original size [2021-11-23 03:36:26,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 31 case distinctions, treesize of input 298 treesize of output 773 [2021-11-23 03:36:27,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:36:27,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:36:27,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:36:27,506 INFO L354 Elim1Store]: treesize reduction 113, result has 32.7 percent of original size [2021-11-23 03:36:27,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 202 treesize of output 202 [2021-11-23 03:37:03,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:03,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:03,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:03,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:04,012 INFO L354 Elim1Store]: treesize reduction 114, result has 31.3 percent of original size [2021-11-23 03:37:04,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 474 treesize of output 392 [2021-11-23 03:37:04,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:04,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:04,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:04,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:04,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:04,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:04,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:04,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 315 treesize of output 206 [2021-11-23 03:37:04,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:04,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:04,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:04,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:04,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:04,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:04,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:04,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 359 treesize of output 238 [2021-11-23 03:37:04,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:04,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:04,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:04,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:04,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:04,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:04,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:04,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 359 treesize of output 238 [2021-11-23 03:37:04,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:04,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:04,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:04,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:05,038 INFO L354 Elim1Store]: treesize reduction 140, result has 15.7 percent of original size [2021-11-23 03:37:05,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 401 treesize of output 294 [2021-11-23 03:37:06,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:06,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:06,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:06,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:06,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:06,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:06,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:06,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 359 treesize of output 238 [2021-11-23 03:37:08,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 264 treesize of output 242 [2021-11-23 03:37:08,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:08,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:08,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:08,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:08,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:08,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:08,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:08,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:08,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:08,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:08,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:08,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 129 [2021-11-23 03:37:08,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 310 treesize of output 288 [2021-11-23 03:37:08,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:08,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:08,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:08,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:08,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:08,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:08,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:08,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:08,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:08,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:08,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:08,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 174 [2021-11-23 03:37:08,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:37:08,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 394 treesize of output 374 [2021-11-23 03:37:08,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:08,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:08,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:08,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 87 [2021-11-23 03:37:09,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:09,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:09,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:09,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:09,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:09,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:09,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:09,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:09,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:37:09,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 346 treesize of output 411 [2021-11-23 03:37:12,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:37:12,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1694 treesize of output 1594 [2021-11-23 03:37:36,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:36,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:36,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:36,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 1397 treesize of output 1279 [2021-11-23 03:38:38,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:38:38,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:38:38,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:38:38,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:38:38,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:38:38,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:38:38,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:38:38,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:38:39,418 INFO L354 Elim1Store]: treesize reduction 167, result has 61.4 percent of original size [2021-11-23 03:38:39,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 8 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 20 case distinctions, treesize of input 2181 treesize of output 1813 [2021-11-23 03:39:52,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:39:52,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1448 treesize of output 1378 [2021-11-23 03:39:52,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:39:52,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1378 treesize of output 1308 [2021-11-23 03:40:00,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:00,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 162 [2021-11-23 03:40:00,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:00,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:00,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:00,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 67 [2021-11-23 03:40:00,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:00,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 57 [2021-11-23 03:40:01,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:01,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:01,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:01,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 595 treesize of output 537 [2021-11-23 03:40:14,425 INFO L354 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2021-11-23 03:40:14,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 53 [2021-11-23 03:40:14,451 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 36 treesize of output 25 [2021-11-23 03:40:14,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:14,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 40 [2021-11-23 03:40:14,995 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 36 treesize of output 25 [2021-11-23 03:40:15,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:15,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 141 [2021-11-23 03:40:22,870 INFO L354 Elim1Store]: treesize reduction 912, result has 42.5 percent of original size [2021-11-23 03:40:22,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 1153 treesize of output 1435 [2021-11-23 03:40:23,974 INFO L354 Elim1Store]: treesize reduction 544, result has 34.7 percent of original size [2021-11-23 03:40:23,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 1469 treesize of output 1496 [2021-11-23 03:42:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:42:36,347 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:42:36,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602770486] [2021-11-23 03:42:36,348 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:42:36,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860552635] [2021-11-23 03:42:36,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860552635] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:42:36,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2054709016] [2021-11-23 03:42:36,350 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:42:36,351 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:42:36,351 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:42:36,351 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:42:36,352 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:42:36,495 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-23 03:42:36,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2021-11-23 03:42:36,651 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-23 03:42:36,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-23 03:42:36,688 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:42:36,693 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:42:36,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:42:36,777 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-23 03:42:36,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 134 [2021-11-23 03:42:36,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:42:36,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 36 [2021-11-23 03:42:36,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:42:36,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 65 [2021-11-23 03:42:36,889 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:42:36,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:42:36,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-23 03:42:36,934 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:42:36,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:42:36,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:42:36,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:37,124 INFO L354 Elim1Store]: treesize reduction 323, result has 15.9 percent of original size [2021-11-23 03:42:37,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 200 [2021-11-23 03:42:37,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:42:37,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:42:37,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:37,184 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:42:37,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 201 treesize of output 120 [2021-11-23 03:42:37,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:37,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:37,219 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:42:37,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 208 treesize of output 96 [2021-11-23 03:42:37,266 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:42:37,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:42:37,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:42:37,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:37,301 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:42:37,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2021-11-23 03:42:37,328 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:42:37,665 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '464#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) (* 2 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-23 03:42:37,665 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:42:37,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:42:37,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-11-23 03:42:37,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330094516] [2021-11-23 03:42:37,666 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:42:37,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:42:37,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:42:37,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:42:37,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:42:37,667 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:42:38,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:42:38,182 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-11-23 03:42:38,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:42:38,185 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 03:42:38,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:42:38,186 INFO L225 Difference]: With dead ends: 40 [2021-11-23 03:42:38,186 INFO L226 Difference]: Without dead ends: 38 [2021-11-23 03:42:38,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:42:38,188 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 44 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:42:38,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 30 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:42:38,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-23 03:42:38,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 17. [2021-11-23 03:42:38,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:42:38,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-23 03:42:38,194 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2021-11-23 03:42:38,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:42:38,194 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-23 03:42:38,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:42:38,195 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-23 03:42:38,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 03:42:38,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:42:38,196 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:42:38,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:42:38,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:42:38,396 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:42:38,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:42:38,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1186125732, now seen corresponding path program 4 times [2021-11-23 03:42:38,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:42:38,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952290630] [2021-11-23 03:42:38,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:42:38,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:42:38,430 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:42:38,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1093798738] [2021-11-23 03:42:38,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:42:38,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:42:38,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:42:38,432 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:42:38,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:42:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:42:38,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:42:38,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:42:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:42:38,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:42:38,615 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:42:38,615 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:42:38,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952290630] [2021-11-23 03:42:38,615 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:42:38,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093798738] [2021-11-23 03:42:38,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093798738] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:42:38,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2033126715] [2021-11-23 03:42:38,618 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:42:38,618 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:42:38,618 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:42:38,618 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:42:38,619 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:42:38,726 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-23 03:42:38,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-23 03:42:38,750 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 29 treesize of output 39 [2021-11-23 03:42:38,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-23 03:42:38,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:42:38,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:42:38,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:38,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:42:38,945 INFO L354 Elim1Store]: treesize reduction 318, result has 12.4 percent of original size [2021-11-23 03:42:38,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 408 treesize of output 447 [2021-11-23 03:42:39,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:39,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 53 [2021-11-23 03:42:39,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:42:39,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 148 treesize of output 55 [2021-11-23 03:42:39,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:42:39,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-23 03:42:39,249 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:42:39,271 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:42:39,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:42:39,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:42:39,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:39,433 INFO L354 Elim1Store]: treesize reduction 323, result has 15.9 percent of original size [2021-11-23 03:42:39,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 165 treesize of output 225 [2021-11-23 03:42:39,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:42:39,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:42:39,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:39,487 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:42:39,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 201 treesize of output 93 [2021-11-23 03:42:39,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:39,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:39,525 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:42:39,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 208 treesize of output 123 [2021-11-23 03:42:39,558 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:42:39,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:42:39,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:42:39,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:39,590 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:42:39,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2021-11-23 03:42:39,617 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:42:39,932 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '639#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) (* 2 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 03:42:39,933 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:42:39,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:42:39,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-23 03:42:39,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181112219] [2021-11-23 03:42:39,933 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:42:39,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 03:42:39,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:42:39,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 03:42:39,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:42:39,935 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:42:40,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:42:40,182 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-11-23 03:42:40,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:42:40,183 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 03:42:40,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:42:40,184 INFO L225 Difference]: With dead ends: 54 [2021-11-23 03:42:40,184 INFO L226 Difference]: Without dead ends: 43 [2021-11-23 03:42:40,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:42:40,186 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 58 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:42:40,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 26 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:42:40,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-23 03:42:40,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2021-11-23 03:42:40,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:42:40,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-11-23 03:42:40,192 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 13 [2021-11-23 03:42:40,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:42:40,193 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-11-23 03:42:40,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:42:40,193 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-11-23 03:42:40,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 03:42:40,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:42:40,194 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:42:40,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:42:40,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:42:40,419 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:42:40,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:42:40,420 INFO L85 PathProgramCache]: Analyzing trace with hash 221349744, now seen corresponding path program 1 times [2021-11-23 03:42:40,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:42:40,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290138330] [2021-11-23 03:42:40,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:42:40,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:42:40,445 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:42:40,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [219221188] [2021-11-23 03:42:40,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:42:40,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:42:40,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:42:40,452 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:42:40,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:42:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:42:40,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 03:42:40,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:42:40,599 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 03:42:40,643 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 11 treesize of output 7 [2021-11-23 03:42:40,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:42:40,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2021-11-23 03:42:40,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:42:40,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-11-23 03:42:40,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:40,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:42:40,846 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-23 03:42:40,846 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 4 case distinctions, treesize of input 45 treesize of output 42 [2021-11-23 03:42:41,112 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-23 03:42:41,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 40 [2021-11-23 03:42:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:42:41,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:42:48,863 INFO L354 Elim1Store]: treesize reduction 559, result has 31.0 percent of original size [2021-11-23 03:42:48,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 313 treesize of output 439 [2021-11-23 03:42:49,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:49,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:49,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:49,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 50 [2021-11-23 03:42:49,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:49,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:49,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:49,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 50 [2021-11-23 03:42:50,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:50,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:50,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:50,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 50 [2021-11-23 03:42:51,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:51,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:51,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:51,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 50 [2021-11-23 03:42:51,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:51,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:51,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:51,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 50 [2021-11-23 03:42:52,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:52,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:52,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:52,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 50 [2021-11-23 03:42:54,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:54,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:54,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:42:54,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2021-11-23 03:42:56,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:56,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:56,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:56,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 58 [2021-11-23 03:42:56,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:56,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:56,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:56,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 58 [2021-11-23 03:42:56,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:56,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:56,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:56,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 47 [2021-11-23 03:42:56,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:56,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:56,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:56,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:56,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 52 [2021-11-23 03:42:57,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:57,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:57,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:57,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:42:57,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:57,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 63 [2021-11-23 03:42:57,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:57,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:57,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:57,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:57,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:57,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:57,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:42:57,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 79 [2021-11-23 03:42:59,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:59,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:59,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:59,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:59,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:42:59,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:42:59,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 405 treesize of output 344 [2021-11-23 03:43:00,921 INFO L354 Elim1Store]: treesize reduction 107, result has 11.6 percent of original size [2021-11-23 03:43:00,921 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 192 treesize of output 144 [2021-11-23 03:43:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:43:01,112 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:43:01,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290138330] [2021-11-23 03:43:01,112 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:43:01,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219221188] [2021-11-23 03:43:01,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219221188] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:43:01,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [730006726] [2021-11-23 03:43:01,115 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:43:01,115 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:43:01,116 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:43:01,116 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:43:01,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:43:01,239 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-23 03:43:01,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2021-11-23 03:43:01,382 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-23 03:43:01,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-23 03:43:01,406 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:43:01,412 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:43:01,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:01,475 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-23 03:43:01,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 134 [2021-11-23 03:43:01,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:43:01,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 34 [2021-11-23 03:43:01,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:01,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 36 [2021-11-23 03:43:01,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:01,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-23 03:43:01,590 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:43:01,610 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:43:01,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:01,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:01,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:43:01,759 INFO L354 Elim1Store]: treesize reduction 323, result has 15.9 percent of original size [2021-11-23 03:43:01,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 200 [2021-11-23 03:43:01,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:01,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:01,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:43:01,804 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:43:01,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 234 treesize of output 126 [2021-11-23 03:43:01,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:43:01,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:43:01,851 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-11-23 03:43:01,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 241 treesize of output 132 [2021-11-23 03:43:01,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:01,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:01,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:43:01,914 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:43:01,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2021-11-23 03:43:01,922 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:43:02,080 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:43:02,851 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '867#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-23 03:43:02,851 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:43:02,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:43:02,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-23 03:43:02,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009752148] [2021-11-23 03:43:02,852 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:43:02,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:43:02,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:43:02,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:43:02,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:43:02,853 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:43:15,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:43:15,337 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2021-11-23 03:43:15,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 03:43:15,338 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 03:43:15,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:43:15,339 INFO L225 Difference]: With dead ends: 80 [2021-11-23 03:43:15,340 INFO L226 Difference]: Without dead ends: 70 [2021-11-23 03:43:15,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=253, Invalid=1152, Unknown=1, NotChecked=0, Total=1406 [2021-11-23 03:43:15,341 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 148 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:43:15,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 72 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 179 Invalid, 0 Unknown, 12 Unchecked, 3.6s Time] [2021-11-23 03:43:15,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-23 03:43:15,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 34. [2021-11-23 03:43:15,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:43:15,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-11-23 03:43:15,351 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 14 [2021-11-23 03:43:15,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:43:15,352 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-11-23 03:43:15,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:43:15,352 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-11-23 03:43:15,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 03:43:15,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:43:15,353 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:43:15,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:43:15,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 03:43:15,554 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:43:15,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:43:15,554 INFO L85 PathProgramCache]: Analyzing trace with hash -211311242, now seen corresponding path program 5 times [2021-11-23 03:43:15,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:43:15,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162454965] [2021-11-23 03:43:15,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:43:15,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:43:15,597 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:43:15,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975764261] [2021-11-23 03:43:15,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:43:15,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:43:15,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:43:15,598 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:43:15,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:43:15,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:43:15,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:43:15,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:43:15,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:43:15,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:43:15,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:43:15,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:43:15,978 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:43:15,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162454965] [2021-11-23 03:43:15,978 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:43:15,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975764261] [2021-11-23 03:43:15,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975764261] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:43:15,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [336396830] [2021-11-23 03:43:15,981 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:43:15,981 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:43:15,981 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:43:15,981 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:43:15,982 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:43:16,133 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-23 03:43:16,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2021-11-23 03:43:16,286 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-23 03:43:16,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-23 03:43:16,313 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:43:16,324 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:43:16,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:16,430 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-23 03:43:16,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 134 [2021-11-23 03:43:16,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:16,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 63 [2021-11-23 03:43:16,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:43:16,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 66 [2021-11-23 03:43:16,517 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:43:16,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:16,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-23 03:43:16,552 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:43:16,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:16,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:16,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:43:16,742 INFO L354 Elim1Store]: treesize reduction 323, result has 15.9 percent of original size [2021-11-23 03:43:16,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 200 [2021-11-23 03:43:16,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:16,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:16,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:43:16,785 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:43:16,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 201 treesize of output 93 [2021-11-23 03:43:16,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:43:16,873 INFO L354 Elim1Store]: treesize reduction 46, result has 38.7 percent of original size [2021-11-23 03:43:16,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 152 [2021-11-23 03:43:16,908 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:43:16,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:16,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:16,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:43:16,934 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:43:16,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2021-11-23 03:43:16,959 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:43:17,294 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1161#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) (* 2 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-23 03:43:17,295 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:43:17,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:43:17,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-11-23 03:43:17,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703544465] [2021-11-23 03:43:17,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:43:17,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:43:17,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:43:17,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:43:17,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:43:17,296 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:43:17,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:43:17,832 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2021-11-23 03:43:17,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:43:17,833 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 03:43:17,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:43:17,834 INFO L225 Difference]: With dead ends: 79 [2021-11-23 03:43:17,835 INFO L226 Difference]: Without dead ends: 65 [2021-11-23 03:43:17,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:43:17,836 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 79 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:43:17,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 58 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:43:17,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-23 03:43:17,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2021-11-23 03:43:17,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:43:17,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-11-23 03:43:17,850 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 14 [2021-11-23 03:43:17,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:43:17,850 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-11-23 03:43:17,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:43:17,851 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-11-23 03:43:17,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 03:43:17,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:43:17,852 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:43:17,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:43:18,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:43:18,052 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:43:18,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:43:18,053 INFO L85 PathProgramCache]: Analyzing trace with hash -582184476, now seen corresponding path program 6 times [2021-11-23 03:43:18,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:43:18,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623213460] [2021-11-23 03:43:18,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:43:18,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:43:18,077 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:43:18,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976627230] [2021-11-23 03:43:18,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:43:18,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:43:18,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:43:18,079 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:43:18,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f91699-ec6d-4dda-9f2b-9a7c1a8a21fe/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:43:18,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:43:18,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:43:18,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 03:43:18,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:43:18,926 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:43:18,973 INFO L354 Elim1Store]: treesize reduction 54, result has 31.6 percent of original size [2021-11-23 03:43:18,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 39 [2021-11-23 03:43:19,929 INFO L354 Elim1Store]: treesize reduction 1715, result has 24.8 percent of original size [2021-11-23 03:43:19,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 49 case distinctions, treesize of input 270 treesize of output 717 [2021-11-23 03:43:20,423 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:43:20,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:20,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:20,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:20,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:43:20,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:20,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:20,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:20,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:20,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:20,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:20,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:20,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 281 treesize of output 223 [2021-11-23 03:43:20,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:20,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:20,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:20,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:20,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:20,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:20,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:20,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:20,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:20,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:20,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:20,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:20,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:20,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:20,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:20,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 221 [2021-11-23 03:43:21,067 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:43:21,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:21,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:21,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:21,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:21,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:21,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:21,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:21,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:21,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:21,465 INFO L354 Elim1Store]: treesize reduction 268, result has 6.9 percent of original size [2021-11-23 03:43:21,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 324 treesize of output 274 [2021-11-23 03:43:21,976 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:43:22,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:22,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:22,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:22,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:22,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:22,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:22,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:22,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:22,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:43:23,059 INFO L354 Elim1Store]: treesize reduction 191, result has 34.4 percent of original size [2021-11-23 03:43:23,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 362 treesize of output 390 [2021-11-23 03:43:24,982 INFO L354 Elim1Store]: treesize reduction 353, result has 25.7 percent of original size [2021-11-23 03:43:24,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 720 treesize of output 557 [2021-11-23 03:43:26,676 INFO L354 Elim1Store]: treesize reduction 346, result has 19.0 percent of original size [2021-11-23 03:43:26,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 130 treesize of output 136 [2021-11-23 03:43:26,939 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:43:26,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:46:15,598 WARN L227 SmtUtils]: Spent 2.54m on a formula simplification. DAG size of input: 254 DAG size of output: 151 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 03:46:15,599 INFO L354 Elim1Store]: treesize reduction 1087, result has 37.4 percent of original size [2021-11-23 03:46:15,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 31 case distinctions, treesize of input 1587 treesize of output 2062 [2021-11-23 03:46:23,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:23,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:23,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:24,187 INFO L244 Elim1Store]: Index analysis took 911 ms [2021-11-23 03:46:50,772 WARN L227 SmtUtils]: Spent 22.84s on a formula simplification. DAG size of input: 51 DAG size of output: 33 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 03:46:50,772 INFO L354 Elim1Store]: treesize reduction 113, result has 32.7 percent of original size [2021-11-23 03:46:50,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 203 treesize of output 203