./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn5.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_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/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_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/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_589836cb-1932-4187-a1d3-b0ab2cef587b/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 2e5b1d71ba93ce7431f315c72529ea116ea643f5eb9195d392455a202e45b249 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:06:34,899 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:06:34,901 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:06:34,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:06:34,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:06:34,936 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:06:34,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:06:34,940 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:06:34,942 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:06:34,943 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:06:34,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:06:34,945 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:06:34,946 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:06:34,947 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:06:34,948 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:06:34,950 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:06:34,951 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:06:34,952 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:06:34,954 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:06:34,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:06:34,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:06:34,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:06:34,961 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:06:34,962 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:06:34,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:06:34,966 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:06:34,967 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:06:34,968 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:06:34,968 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:06:34,969 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:06:34,969 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:06:34,970 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:06:34,971 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:06:34,972 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:06:34,973 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:06:34,974 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:06:34,974 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:06:34,975 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:06:34,975 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:06:34,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:06:34,977 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:06:34,978 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:06:35,004 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:06:35,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:06:35,004 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:06:35,004 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:06:35,005 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:06:35,005 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:06:35,005 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:06:35,006 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:06:35,006 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:06:35,006 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:06:35,006 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:06:35,006 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:06:35,007 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:06:35,007 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:06:35,007 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:06:35,007 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:06:35,007 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:06:35,007 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:06:35,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:06:35,008 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:06:35,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:06:35,009 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:06:35,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:06:35,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:06:35,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:06:35,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:06:35,010 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:06:35,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:06:35,010 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:06:35,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:06:35,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:06:35,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:06:35,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:06:35,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:06:35,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:06:35,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:06:35,012 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:06:35,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:06:35,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:06:35,012 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:06:35,012 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:06:35,012 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_589836cb-1932-4187-a1d3-b0ab2cef587b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e5b1d71ba93ce7431f315c72529ea116ea643f5eb9195d392455a202e45b249 [2021-11-23 03:06:35,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:06:35,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:06:35,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:06:35,320 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:06:35,321 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:06:35,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-fpi/ifeqn5.c [2021-11-23 03:06:35,394 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/data/4bed3d293/032e132a29474825be877c007840ae39/FLAG740afa711 [2021-11-23 03:06:35,842 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:06:35,843 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/sv-benchmarks/c/array-fpi/ifeqn5.c [2021-11-23 03:06:35,849 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/data/4bed3d293/032e132a29474825be877c007840ae39/FLAG740afa711 [2021-11-23 03:06:36,240 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/data/4bed3d293/032e132a29474825be877c007840ae39 [2021-11-23 03:06:36,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:06:36,244 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:06:36,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:06:36,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:06:36,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:06:36,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:06:36" (1/1) ... [2021-11-23 03:06:36,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60ae80ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:36, skipping insertion in model container [2021-11-23 03:06:36,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:06:36" (1/1) ... [2021-11-23 03:06:36,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:06:36,294 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:06:36,468 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_589836cb-1932-4187-a1d3-b0ab2cef587b/sv-benchmarks/c/array-fpi/ifeqn5.c[589,602] [2021-11-23 03:06:36,513 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:06:36,525 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:06:36,541 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_589836cb-1932-4187-a1d3-b0ab2cef587b/sv-benchmarks/c/array-fpi/ifeqn5.c[589,602] [2021-11-23 03:06:36,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:06:36,583 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:06:36,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:36 WrapperNode [2021-11-23 03:06:36,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:06:36,586 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:06:36,586 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:06:36,587 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:06:36,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:36" (1/1) ... [2021-11-23 03:06:36,616 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:36" (1/1) ... [2021-11-23 03:06:36,649 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2021-11-23 03:06:36,650 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:06:36,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:06:36,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:06:36,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:06:36,661 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:36" (1/1) ... [2021-11-23 03:06:36,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:36" (1/1) ... [2021-11-23 03:06:36,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:36" (1/1) ... [2021-11-23 03:06:36,667 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:36" (1/1) ... [2021-11-23 03:06:36,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:36" (1/1) ... [2021-11-23 03:06:36,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:36" (1/1) ... [2021-11-23 03:06:36,698 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:36" (1/1) ... [2021-11-23 03:06:36,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:06:36,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:06:36,707 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:06:36,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:06:36,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:36" (1/1) ... [2021-11-23 03:06:36,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:06:36,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:06:36,745 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:06:36,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:06:36,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:06:36,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:06:36,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:06:36,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:06:36,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:06:36,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:06:36,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:06:36,860 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:06:36,861 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:06:37,020 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:06:37,137 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:06:37,137 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 03:06:37,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:06:37 BoogieIcfgContainer [2021-11-23 03:06:37,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:06:37,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:06:37,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:06:37,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:06:37,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:06:36" (1/3) ... [2021-11-23 03:06:37,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24809892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:06:37, skipping insertion in model container [2021-11-23 03:06:37,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:36" (2/3) ... [2021-11-23 03:06:37,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24809892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:06:37, skipping insertion in model container [2021-11-23 03:06:37,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:06:37" (3/3) ... [2021-11-23 03:06:37,161 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn5.c [2021-11-23 03:06:37,170 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:06:37,171 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:06:37,227 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:06:37,235 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 03:06:37,235 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:06:37,250 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 03:06:37,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:06:37,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:06:37,256 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:06:37,257 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:06:37,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:06:37,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1095923036, now seen corresponding path program 1 times [2021-11-23 03:06:37,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:06:37,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914133676] [2021-11-23 03:06:37,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:06:37,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:06:37,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:06:37,474 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 03:06:37,475 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:06:37,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914133676] [2021-11-23 03:06:37,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914133676] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:06:37,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:06:37,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:06:37,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687206447] [2021-11-23 03:06:37,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:06:37,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:06:37,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:06:37,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:06:37,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:06:37,517 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 03:06:37,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:06:37,575 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2021-11-23 03:06:37,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:06:37,578 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 03:06:37,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:06:37,587 INFO L225 Difference]: With dead ends: 20 [2021-11-23 03:06:37,587 INFO L226 Difference]: Without dead ends: 10 [2021-11-23 03:06:37,591 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 03:06:37,595 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:06:37,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:06:37,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-23 03:06:37,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-23 03:06:37,631 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 03:06:37,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-11-23 03:06:37,633 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-11-23 03:06:37,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:06:37,634 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-11-23 03:06:37,634 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 03:06:37,635 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-11-23 03:06:37,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 03:06:37,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:06:37,635 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:06:37,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:06:37,636 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:06:37,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:06:37,638 INFO L85 PathProgramCache]: Analyzing trace with hash 255696374, now seen corresponding path program 1 times [2021-11-23 03:06:37,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:06:37,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903572605] [2021-11-23 03:06:37,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:06:37,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:06:37,670 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:06:37,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992851389] [2021-11-23 03:06:37,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:06:37,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:06:37,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:06:37,673 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:06:37,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:06:37,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:06:37,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:06:37,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:06:37,843 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 03:06:37,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:06:37,844 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:06:37,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903572605] [2021-11-23 03:06:37,844 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:06:37,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992851389] [2021-11-23 03:06:37,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992851389] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:06:37,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:06:37,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:06:37,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111075863] [2021-11-23 03:06:37,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:06:37,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:06:37,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:06:37,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:06:37,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:06:37,849 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 03:06:37,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:06:37,908 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-11-23 03:06:37,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:06:37,909 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 03:06:37,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:06:37,910 INFO L225 Difference]: With dead ends: 21 [2021-11-23 03:06:37,910 INFO L226 Difference]: Without dead ends: 16 [2021-11-23 03:06:37,910 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 03:06:37,912 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:06:37,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 6 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:06:37,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-23 03:06:37,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2021-11-23 03:06:37,917 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 03:06:37,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-23 03:06:37,918 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-11-23 03:06:37,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:06:37,919 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-23 03:06:37,919 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 03:06:37,919 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-23 03:06:37,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:06:37,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:06:37,920 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:06:37,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:06:38,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:06:38,146 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:06:38,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:06:38,147 INFO L85 PathProgramCache]: Analyzing trace with hash -652476163, now seen corresponding path program 1 times [2021-11-23 03:06:38,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:06:38,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775199480] [2021-11-23 03:06:38,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:06:38,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:06:38,197 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:06:38,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [64607233] [2021-11-23 03:06:38,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:06:38,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:06:38,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:06:38,213 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:06:38,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:06:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:06:38,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 03:06:38,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:06:38,379 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 03:06:38,550 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 03:06:38,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:06:40,059 INFO L354 Elim1Store]: treesize reduction 1087, result has 37.4 percent of original size [2021-11-23 03:06:40,063 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 03:06:40,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:06:40,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:06:40,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:06:41,039 INFO L354 Elim1Store]: treesize reduction 113, result has 32.7 percent of original size [2021-11-23 03:06:41,040 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 03:06:41,420 INFO L354 Elim1Store]: treesize reduction 244, result has 30.3 percent of original size [2021-11-23 03:06:41,421 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 03:06:41,668 INFO L354 Elim1Store]: treesize reduction 244, result has 30.3 percent of original size [2021-11-23 03:06:41,669 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 03:06:41,936 INFO L354 Elim1Store]: treesize reduction 227, result has 34.2 percent of original size [2021-11-23 03:06:41,937 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 03:06:42,328 INFO L354 Elim1Store]: treesize reduction 179, result has 48.1 percent of original size [2021-11-23 03:06:42,329 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 03:06:48,054 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 03:06:48,054 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:06:48,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775199480] [2021-11-23 03:06:48,055 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:06:48,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64607233] [2021-11-23 03:06:48,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64607233] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:06:48,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [755213232] [2021-11-23 03:06:48,090 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:06:48,090 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:06:48,096 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:06:48,102 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:06:48,103 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:06:48,254 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-23 03:06:48,254 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 03:06:48,377 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-23 03:06:48,377 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 03:06:48,429 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 03:06:48,435 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:06:48,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:48,519 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-23 03:06:48,520 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 03:06:48,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:48,563 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 03:06:48,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:06:48,583 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 03:06:48,637 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 03:06:48,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:48,650 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 03:06:48,688 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 03:06:48,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:48,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:48,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:06:48,818 INFO L354 Elim1Store]: treesize reduction 323, result has 15.9 percent of original size [2021-11-23 03:06:48,819 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 03:06:48,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:06:48,907 INFO L354 Elim1Store]: treesize reduction 46, result has 38.7 percent of original size [2021-11-23 03:06:48,907 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 122 treesize of output 93 [2021-11-23 03:06:48,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:48,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:48,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:06:48,936 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:06:48,937 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 66 [2021-11-23 03:06:48,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:48,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:48,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:06:49,002 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:06:49,003 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 03:06:49,011 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 03:06:49,036 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:06:49,329 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) (<= 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_#in~cond#1| (ite (= (+ (* 5 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) (* 5 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 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 03:06:49,329 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:06:49,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:06:49,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-23 03:06:49,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11508115] [2021-11-23 03:06:49,330 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:06:49,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:06:49,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:06:49,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:06:49,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:06:49,332 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 03:06:49,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:06:49,466 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-11-23 03:06:49,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:06:49,466 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 03:06:49,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:06:49,467 INFO L225 Difference]: With dead ends: 28 [2021-11-23 03:06:49,467 INFO L226 Difference]: Without dead ends: 26 [2021-11-23 03:06:49,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:06:49,470 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 03:06:49,471 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 03:06:49,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-23 03:06:49,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 14. [2021-11-23 03:06:49,476 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 03:06:49,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-23 03:06:49,477 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2021-11-23 03:06:49,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:06:49,477 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-23 03:06:49,477 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 03:06:49,478 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-23 03:06:49,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 03:06:49,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:06:49,478 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:06:49,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:06:49,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:06:49,693 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:06:49,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:06:49,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1258946262, now seen corresponding path program 2 times [2021-11-23 03:06:49,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:06:49,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631811220] [2021-11-23 03:06:49,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:06:49,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:06:49,732 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:06:49,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491267533] [2021-11-23 03:06:49,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:06:49,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:06:49,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:06:49,734 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:06:49,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:06:49,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:06:49,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:06:49,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:06:49,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:06:49,839 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 03:06:49,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:06:49,875 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 03:06:49,876 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:06:49,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631811220] [2021-11-23 03:06:49,876 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:06:49,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491267533] [2021-11-23 03:06:49,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491267533] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:06:49,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2091008837] [2021-11-23 03:06:49,879 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:06:49,879 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:06:49,879 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:06:49,880 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:06:49,880 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:06:50,010 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-23 03:06:50,010 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 03:06:50,031 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 03:06:50,064 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 03:06:50,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:06:50,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:50,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:50,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:50,254 INFO L354 Elim1Store]: treesize reduction 318, result has 12.4 percent of original size [2021-11-23 03:06:50,254 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 03:06:50,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:50,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:50,345 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 50 [2021-11-23 03:06:50,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:06:50,437 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 101 treesize of output 54 [2021-11-23 03:06:50,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:50,533 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 03:06:50,541 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 03:06:50,593 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 03:06:50,623 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 03:06:50,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:50,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:50,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:06:50,642 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:06:50,643 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 03:06:50,667 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:06:50,963 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) (<= 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___VERIFIER_assert_#in~cond#1| (ite (= (+ (* 5 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) (* 5 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |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 03:06:50,964 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:06:50,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:06:50,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-23 03:06:50,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541352471] [2021-11-23 03:06:50,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:06:50,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:06:50,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:06:50,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:06:50,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:06:50,966 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 03:06:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:06:51,064 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-11-23 03:06:51,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:06:51,065 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 03:06:51,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:06:51,066 INFO L225 Difference]: With dead ends: 35 [2021-11-23 03:06:51,066 INFO L226 Difference]: Without dead ends: 23 [2021-11-23 03:06:51,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:06:51,067 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 03:06:51,068 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 03:06:51,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-23 03:06:51,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 13. [2021-11-23 03:06:51,071 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 03:06:51,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-23 03:06:51,072 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2021-11-23 03:06:51,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:06:51,072 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-23 03:06:51,072 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 03:06:51,072 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-23 03:06:51,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 03:06:51,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:06:51,073 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:06:51,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-23 03:06:51,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:06:51,277 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:06:51,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:06:51,278 INFO L85 PathProgramCache]: Analyzing trace with hash 2034389572, now seen corresponding path program 3 times [2021-11-23 03:06:51,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:06:51,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532891252] [2021-11-23 03:06:51,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:06:51,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:06:51,306 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:06:51,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1042081801] [2021-11-23 03:06:51,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:06:51,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:06:51,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:06:51,307 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:06:51,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:06:51,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:06:51,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:06:51,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 03:06:51,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:06:51,489 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 03:06:51,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:51,547 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-11-23 03:06:51,547 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 03:06:51,606 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 03:06:51,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:06:53,044 INFO L354 Elim1Store]: treesize reduction 1087, result has 37.4 percent of original size [2021-11-23 03:06:53,044 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 03:06:53,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:06:53,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:06:53,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:06:54,020 INFO L354 Elim1Store]: treesize reduction 113, result has 32.7 percent of original size [2021-11-23 03:06:54,020 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 204 treesize of output 204 [2021-11-23 03:07:14,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:07:14,221 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 984 treesize of output 956 [2021-11-23 03:07:14,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:07:14,255 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 956 treesize of output 948 [2021-11-23 03:07:14,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:07:14,326 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 948 treesize of output 932 [2021-11-23 03:07:14,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:07:14,384 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 932 treesize of output 912 [2021-11-23 03:07:21,984 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-23 03:07:21,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 476 treesize of output 446 [2021-11-23 03:07:22,178 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-23 03:07:22,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 395 treesize of output 365 [2021-11-23 03:07:22,437 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-23 03:07:22,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 314 treesize of output 284 [2021-11-23 03:07:22,567 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-23 03:07:22,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 233 treesize of output 203 [2021-11-23 03:07:26,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:07:26,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 42 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 3 case distinctions, treesize of input 1881 treesize of output 1750 [2021-11-23 03:07:40,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:41,149 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:07:41,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 42 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 3 case distinctions, treesize of input 1747 treesize of output 1473 [2021-11-23 03:07:50,709 INFO L354 Elim1Store]: treesize reduction 1079, result has 4.2 percent of original size [2021-11-23 03:07:50,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 1236 treesize of output 964 [2021-11-23 03:07:51,054 INFO L354 Elim1Store]: treesize reduction 1079, result has 4.2 percent of original size [2021-11-23 03:07:51,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 1066 treesize of output 749 [2021-11-23 03:07:51,379 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 03:07:51,379 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:51,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532891252] [2021-11-23 03:07:51,380 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:07:51,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042081801] [2021-11-23 03:07:51,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042081801] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:07:51,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [644278234] [2021-11-23 03:07:51,382 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:07:51,382 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:07:51,383 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:07:51,383 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:07:51,383 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:07:51,524 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-23 03:07:51,525 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 03:07:51,668 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-23 03:07:51,669 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 03:07:51,698 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:07:51,711 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 03:07:51,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:51,778 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-23 03:07:51,778 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 03:07:51,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:51,818 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 03:07:51,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:51,836 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 03:07:51,866 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 03:07:51,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:51,879 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 03:07:51,902 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 03:07:51,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:51,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:51,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:52,022 INFO L354 Elim1Store]: treesize reduction 323, result has 15.9 percent of original size [2021-11-23 03:07:52,022 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 137 treesize of output 197 [2021-11-23 03:07:52,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:52,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:52,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:52,080 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:07:52,081 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 03:07:52,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:52,143 INFO L354 Elim1Store]: treesize reduction 46, result has 38.7 percent of original size [2021-11-23 03:07:52,144 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 158 [2021-11-23 03:07:52,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:52,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:52,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:52,219 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:07:52,219 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 03:07:52,228 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 03:07:52,262 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:07:52,642 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) (<= 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_#in~cond#1| (ite (= (+ (* 5 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) (* 5 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 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 03:07:52,642 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:07:52,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:07:52,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-11-23 03:07:52,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670726183] [2021-11-23 03:07:52,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:07:52,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:07:52,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:52,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:07:52,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:07:52,644 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 03:07:52,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:52,951 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-11-23 03:07:52,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:07:52,952 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 03:07:52,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:52,953 INFO L225 Difference]: With dead ends: 40 [2021-11-23 03:07:52,953 INFO L226 Difference]: Without dead ends: 38 [2021-11-23 03:07:52,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:07:52,955 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 44 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:52,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 30 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:07:52,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-23 03:07:52,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 17. [2021-11-23 03:07:52,960 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 03:07:52,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-23 03:07:52,961 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2021-11-23 03:07:52,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:07:52,961 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-23 03:07:52,961 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 03:07:52,962 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-23 03:07:52,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 03:07:52,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:52,962 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:07:52,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 03:07:53,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:53,181 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:53,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:53,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1186125732, now seen corresponding path program 4 times [2021-11-23 03:07:53,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:53,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638860868] [2021-11-23 03:07:53,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:53,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:53,234 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:07:53,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489137264] [2021-11-23 03:07:53,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:07:53,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:53,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:07:53,236 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:07:53,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:07:53,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:07:53,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:07:53,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:07:53,344 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 03:07:53,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:07:53,390 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 03:07:53,391 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:53,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638860868] [2021-11-23 03:07:53,391 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:07:53,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489137264] [2021-11-23 03:07:53,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489137264] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:07:53,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1144812952] [2021-11-23 03:07:53,395 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:07:53,395 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:07:53,395 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:07:53,395 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:07:53,395 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:07:53,515 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-23 03:07:53,515 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 03:07:53,534 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 03:07:53,571 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 03:07:53,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:53,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:53,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:53,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:53,786 INFO L354 Elim1Store]: treesize reduction 318, result has 12.4 percent of original size [2021-11-23 03:07:53,787 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 03:07:53,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:53,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:53,890 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 87 treesize of output 48 [2021-11-23 03:07:53,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:53,936 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 56 [2021-11-23 03:07:54,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:07:54,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:54,066 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 03:07:54,121 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 03:07:54,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:54,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:54,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:54,164 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:07:54,164 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 03:07:54,170 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 03:07:54,191 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:07:54,445 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) (<= 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___VERIFIER_assert_#in~cond#1| (ite (= (+ (* 5 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) (* 5 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |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 03:07:54,445 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:07:54,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:07:54,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-23 03:07:54,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101150084] [2021-11-23 03:07:54,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:07:54,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 03:07:54,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:54,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 03:07:54,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:07:54,447 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 03:07:54,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:54,577 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-11-23 03:07:54,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:07:54,578 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 03:07:54,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:54,579 INFO L225 Difference]: With dead ends: 54 [2021-11-23 03:07:54,579 INFO L226 Difference]: Without dead ends: 43 [2021-11-23 03:07:54,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:07:54,580 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 58 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:54,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 26 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:07:54,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-23 03:07:54,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2021-11-23 03:07:54,586 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 03:07:54,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-11-23 03:07:54,586 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 13 [2021-11-23 03:07:54,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:07:54,587 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-11-23 03:07:54,587 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 03:07:54,587 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-11-23 03:07:54,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 03:07:54,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:54,588 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:07:54,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:07:54,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:54,788 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:54,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:54,789 INFO L85 PathProgramCache]: Analyzing trace with hash 221349744, now seen corresponding path program 1 times [2021-11-23 03:07:54,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:54,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819797644] [2021-11-23 03:07:54,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:54,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:54,812 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:07:54,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053858510] [2021-11-23 03:07:54,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:54,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:54,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:07:54,825 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:07:54,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:07:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:07:54,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 03:07:54,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:07:54,996 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 03:07:55,021 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 03:07:55,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:55,045 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 03:07:55,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:55,105 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 34 treesize of output 32 [2021-11-23 03:07:55,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:55,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:55,153 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-23 03:07:55,153 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 51 treesize of output 44 [2021-11-23 03:07:55,381 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-23 03:07:55,382 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 84 treesize of output 44 [2021-11-23 03:07:55,400 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 03:07:55,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:08:00,442 INFO L354 Elim1Store]: treesize reduction 559, result has 31.0 percent of original size [2021-11-23 03:08:00,442 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 03:08:01,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:01,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:01,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:01,002 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 88 treesize of output 52 [2021-11-23 03:08:01,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:01,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:01,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:01,201 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 88 treesize of output 52 [2021-11-23 03:08:01,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:01,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:01,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:01,417 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 88 treesize of output 52 [2021-11-23 03:08:02,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:02,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:02,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:02,475 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 88 treesize of output 53 [2021-11-23 03:08:02,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:02,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:02,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:02,549 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 88 treesize of output 53 [2021-11-23 03:08:03,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:03,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:03,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:03,474 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 88 treesize of output 53 [2021-11-23 03:08:04,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:04,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:04,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:04,125 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 87 treesize of output 52 [2021-11-23 03:08:04,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:04,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:04,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:04,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 52 [2021-11-23 03:08:05,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:05,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:05,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:05,445 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 87 treesize of output 52 [2021-11-23 03:08:06,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:06,392 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 39 treesize of output 22 [2021-11-23 03:08:07,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:07,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:07,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:07,259 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 67 treesize of output 38 [2021-11-23 03:08:08,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:08,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:08,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:08,747 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 89 treesize of output 40 [2021-11-23 03:08:08,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:08,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:08,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:08,864 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 118 treesize of output 56 [2021-11-23 03:08:09,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:09,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:09,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:09,095 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 217 treesize of output 119 [2021-11-23 03:08:09,875 INFO L354 Elim1Store]: treesize reduction 174, result has 13.4 percent of original size [2021-11-23 03:08:09,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 260 treesize of output 175 [2021-11-23 03:08:10,151 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 03:08:10,151 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:08:10,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819797644] [2021-11-23 03:08:10,152 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:08:10,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053858510] [2021-11-23 03:08:10,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053858510] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:08:10,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1226138748] [2021-11-23 03:08:10,154 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:08:10,154 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:08:10,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:08:10,154 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:08:10,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:08:10,267 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-23 03:08:10,268 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 03:08:10,408 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-23 03:08:10,408 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 03:08:10,437 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:08:10,442 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 03:08:10,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:10,529 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-23 03:08:10,530 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 03:08:10,590 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:08:10,590 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 03:08:10,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:10,606 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 03:08:10,641 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 03:08:10,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:10,660 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 03:08:10,687 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 03:08:10,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:10,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:10,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:10,800 INFO L354 Elim1Store]: treesize reduction 323, result has 15.9 percent of original size [2021-11-23 03:08:10,801 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 03:08:10,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:10,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:10,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:10,846 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:08:10,847 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 03:08:10,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:10,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:10,881 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-11-23 03:08:10,882 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 03:08:10,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:10,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:10,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:10,936 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:08:10,936 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 03:08:10,957 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 03:08:11,109 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:08:11,769 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 03:08:11,769 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:08:11,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:08:11,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-23 03:08:11,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653619260] [2021-11-23 03:08:11,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:08:11,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:08:11,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:08:11,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:08:11,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:08:11,771 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 03:08:22,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:08:22,937 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2021-11-23 03:08:22,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 03:08:22,938 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 03:08:22,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:08:22,938 INFO L225 Difference]: With dead ends: 80 [2021-11-23 03:08:22,939 INFO L226 Difference]: Without dead ends: 70 [2021-11-23 03:08:22,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=253, Invalid=1153, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 03:08:22,940 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 148 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:08:22,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 75 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 176 Invalid, 0 Unknown, 12 Unchecked, 2.5s Time] [2021-11-23 03:08:22,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-23 03:08:22,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 34. [2021-11-23 03:08:22,949 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 03:08:22,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-11-23 03:08:22,950 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 14 [2021-11-23 03:08:22,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:08:22,950 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-11-23 03:08:22,950 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 03:08:22,950 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-11-23 03:08:22,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 03:08:22,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:08:22,951 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:08:22,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-23 03:08:23,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:08:23,158 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:08:23,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:08:23,158 INFO L85 PathProgramCache]: Analyzing trace with hash -211311242, now seen corresponding path program 5 times [2021-11-23 03:08:23,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:08:23,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591507595] [2021-11-23 03:08:23,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:08:23,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:08:23,183 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:08:23,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334848702] [2021-11-23 03:08:23,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:08:23,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:08:23,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:08:23,193 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:08:23,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:08:23,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:08:23,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:08:23,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:08:23,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:08:23,455 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 03:08:23,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:08:23,510 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 03:08:23,511 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:08:23,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591507595] [2021-11-23 03:08:23,511 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:08:23,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334848702] [2021-11-23 03:08:23,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334848702] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:08:23,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1204145110] [2021-11-23 03:08:23,513 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:08:23,513 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:08:23,513 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:08:23,513 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:08:23,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:08:23,616 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-23 03:08:23,616 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 03:08:23,759 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-23 03:08:23,759 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 03:08:23,783 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 03:08:23,790 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:08:23,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:23,882 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-23 03:08:23,883 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 03:08:23,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:08:23,926 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 03:08:23,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:23,943 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 03:08:23,975 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 03:08:23,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:23,986 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 03:08:24,017 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 03:08:24,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:24,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:24,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:24,130 INFO L354 Elim1Store]: treesize reduction 323, result has 15.9 percent of original size [2021-11-23 03:08:24,131 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 03:08:24,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:24,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:24,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:24,182 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:08:24,182 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 03:08:24,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:24,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:24,217 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:08:24,218 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 03:08:24,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:24,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:24,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:24,285 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:08:24,286 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 03:08:24,293 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 03:08:24,320 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:08:24,608 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) (<= 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_#in~cond#1| (ite (= (+ (* 5 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) (* 5 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 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 03:08:24,608 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:08:24,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:08:24,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-11-23 03:08:24,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529493928] [2021-11-23 03:08:24,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:08:24,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:08:24,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:08:24,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:08:24,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:08:24,609 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 03:08:24,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:08:24,858 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2021-11-23 03:08:24,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:08:24,859 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 03:08:24,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:08:24,859 INFO L225 Difference]: With dead ends: 79 [2021-11-23 03:08:24,860 INFO L226 Difference]: Without dead ends: 65 [2021-11-23 03:08:24,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:08:24,861 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 79 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:08:24,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 58 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:08:24,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-23 03:08:24,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2021-11-23 03:08:24,869 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 03:08:24,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-11-23 03:08:24,870 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 14 [2021-11-23 03:08:24,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:08:24,870 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-11-23 03:08:24,870 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 03:08:24,870 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-11-23 03:08:24,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 03:08:24,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:08:24,871 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:08:24,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:08:25,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:08:25,085 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:08:25,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:08:25,086 INFO L85 PathProgramCache]: Analyzing trace with hash -582184476, now seen corresponding path program 6 times [2021-11-23 03:08:25,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:08:25,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879470489] [2021-11-23 03:08:25,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:08:25,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:08:25,110 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:08:25,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309817707] [2021-11-23 03:08:25,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:08:25,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:08:25,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:08:25,113 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:08:25,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589836cb-1932-4187-a1d3-b0ab2cef587b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:08:26,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:08:26,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:08:26,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 03:08:26,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:08:26,091 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 03:08:26,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:26,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:26,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:26,170 INFO L354 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2021-11-23 03:08:26,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 245 treesize of output 413 [2021-11-23 03:08:26,221 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:08:26,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:26,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:26,446 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 03:08:26,446 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 6 case distinctions, treesize of input 300 treesize of output 185 [2021-11-23 03:08:26,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:26,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:26,483 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 03:08:26,483 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 6 case distinctions, treesize of input 270 treesize of output 157 [2021-11-23 03:08:26,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:26,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:26,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:26,517 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 03:08:26,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 182 treesize of output 103 [2021-11-23 03:08:26,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:26,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:26,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:26,614 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:08:26,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 278 treesize of output 478 [2021-11-23 03:08:26,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:26,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:26,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:26,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:26,953 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:08:26,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 394 treesize of output 250 [2021-11-23 03:08:27,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:27,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:27,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:27,025 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:08:27,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 353 treesize of output 215 [2021-11-23 03:08:27,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:27,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:27,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:27,075 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:08:27,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 295 treesize of output 145 [2021-11-23 03:08:27,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:27,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:27,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:27,161 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:08:27,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 69 treesize of output 71 [2021-11-23 03:08:27,282 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 03:08:27,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:11:13,574 WARN L227 SmtUtils]: Spent 2.53m 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 03:11:13,575 INFO L354 Elim1Store]: treesize reduction 1087, result has 37.4 percent of original size [2021-11-23 03:11:13,575 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 03:11:22,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:22,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:22,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:23,083 INFO L244 Elim1Store]: Index analysis took 958 ms [2021-11-23 03:11:49,824 WARN L227 SmtUtils]: Spent 23.44s 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 03:11:49,825 INFO L354 Elim1Store]: treesize reduction 113, result has 32.7 percent of original size [2021-11-23 03:11:49,826 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 204 treesize of output 204