./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/skipped.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_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/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_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/skipped.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/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_469575de-01fc-4167-8e49-92fc462585ca/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 0c36d485530e5f36dabf3b382821b7ad25023b1cbf4cb81b13349652fc8273f7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:26:52,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:26:52,717 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:26:52,780 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:26:52,780 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:26:52,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:26:52,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:26:52,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:26:52,794 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:26:52,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:26:52,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:26:52,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:26:52,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:26:52,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:26:52,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:26:52,812 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:26:52,814 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:26:52,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:26:52,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:26:52,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:26:52,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:26:52,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:26:52,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:26:52,833 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:26:52,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:26:52,837 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:26:52,837 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:26:52,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:26:52,840 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:26:52,842 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:26:52,842 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:26:52,843 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:26:52,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:26:52,846 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:26:52,848 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:26:52,848 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:26:52,849 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:26:52,849 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:26:52,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:26:52,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:26:52,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:26:52,852 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:26:52,901 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:26:52,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:26:52,902 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:26:52,902 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:26:52,903 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:26:52,910 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:26:52,910 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:26:52,910 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:26:52,910 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:26:52,911 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:26:52,912 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:26:52,912 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:26:52,912 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:26:52,912 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:26:52,913 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:26:52,913 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:26:52,913 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:26:52,913 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:26:52,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:26:52,914 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:26:52,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:26:52,915 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:26:52,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:26:52,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:26:52,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:26:52,916 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:26:52,917 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:26:52,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:26:52,918 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:26:52,918 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:26:52,918 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:26:52,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:26:52,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:26:52,919 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:26:52,919 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:26:52,920 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:26:52,920 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:26:52,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:26:52,920 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:26:52,921 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:26:52,921 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:26:52,921 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_469575de-01fc-4167-8e49-92fc462585ca/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0c36d485530e5f36dabf3b382821b7ad25023b1cbf4cb81b13349652fc8273f7 [2021-11-23 02:26:53,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:26:53,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:26:53,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:26:53,246 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:26:53,246 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:26:53,248 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-tiling/skipped.c [2021-11-23 02:26:53,338 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/data/2c1f57c2c/4ab159ac89de4cf883538840ebb57c7a/FLAGc8506c7c8 [2021-11-23 02:26:53,900 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:26:53,901 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/sv-benchmarks/c/array-tiling/skipped.c [2021-11-23 02:26:53,911 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/data/2c1f57c2c/4ab159ac89de4cf883538840ebb57c7a/FLAGc8506c7c8 [2021-11-23 02:26:54,251 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/data/2c1f57c2c/4ab159ac89de4cf883538840ebb57c7a [2021-11-23 02:26:54,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:26:54,255 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:26:54,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:26:54,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:26:54,265 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:26:54,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:26:54" (1/1) ... [2021-11-23 02:26:54,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@343cd698 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:54, skipping insertion in model container [2021-11-23 02:26:54,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:26:54" (1/1) ... [2021-11-23 02:26:54,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:26:54,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:26:54,465 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_469575de-01fc-4167-8e49-92fc462585ca/sv-benchmarks/c/array-tiling/skipped.c[398,411] [2021-11-23 02:26:54,485 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:26:54,494 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:26:54,507 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_469575de-01fc-4167-8e49-92fc462585ca/sv-benchmarks/c/array-tiling/skipped.c[398,411] [2021-11-23 02:26:54,516 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:26:54,530 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:26:54,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:54 WrapperNode [2021-11-23 02:26:54,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:26:54,532 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:26:54,532 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:26:54,532 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:26:54,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:54" (1/1) ... [2021-11-23 02:26:54,547 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:54" (1/1) ... [2021-11-23 02:26:54,569 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2021-11-23 02:26:54,569 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:26:54,570 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:26:54,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:26:54,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:26:54,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:54" (1/1) ... [2021-11-23 02:26:54,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:54" (1/1) ... [2021-11-23 02:26:54,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:54" (1/1) ... [2021-11-23 02:26:54,582 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:54" (1/1) ... [2021-11-23 02:26:54,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:54" (1/1) ... [2021-11-23 02:26:54,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:54" (1/1) ... [2021-11-23 02:26:54,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:54" (1/1) ... [2021-11-23 02:26:54,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:26:54,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:26:54,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:26:54,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:26:54,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:54" (1/1) ... [2021-11-23 02:26:54,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:26:54,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:26:54,636 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:26:54,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:26:54,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:26:54,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:26:54,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:26:54,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:26:54,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:26:54,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:26:54,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:26:54,745 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:26:54,747 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:26:54,941 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:26:55,024 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:26:55,025 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 02:26:55,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:26:55 BoogieIcfgContainer [2021-11-23 02:26:55,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:26:55,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:26:55,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:26:55,034 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:26:55,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:26:54" (1/3) ... [2021-11-23 02:26:55,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c5e879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:26:55, skipping insertion in model container [2021-11-23 02:26:55,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:54" (2/3) ... [2021-11-23 02:26:55,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c5e879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:26:55, skipping insertion in model container [2021-11-23 02:26:55,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:26:55" (3/3) ... [2021-11-23 02:26:55,039 INFO L111 eAbstractionObserver]: Analyzing ICFG skipped.c [2021-11-23 02:26:55,045 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:26:55,045 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:26:55,094 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:26:55,101 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:26:55,102 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:26:55,115 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) 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 02:26:55,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 02:26:55,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:26:55,121 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:26:55,122 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:26:55,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:26:55,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1867790854, now seen corresponding path program 1 times [2021-11-23 02:26:55,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:26:55,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334727832] [2021-11-23 02:26:55,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:55,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:26:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:55,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:26:55,334 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:26:55,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334727832] [2021-11-23 02:26:55,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334727832] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:26:55,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:26:55,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:26:55,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827830820] [2021-11-23 02:26:55,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:26:55,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:26:55,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:26:55,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:26:55,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:26:55,386 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) 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) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 02:26:55,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:26:55,441 INFO L93 Difference]: Finished difference Result 24 states and 33 transitions. [2021-11-23 02:26:55,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:26:55,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 02:26:55,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:26:55,453 INFO L225 Difference]: With dead ends: 24 [2021-11-23 02:26:55,455 INFO L226 Difference]: Without dead ends: 11 [2021-11-23 02:26:55,459 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 02:26:55,466 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:26:55,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:26:55,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-23 02:26:55,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-23 02:26:55,501 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 02:26:55,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-23 02:26:55,503 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-11-23 02:26:55,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:26:55,503 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-23 02:26:55,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 02:26:55,504 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-23 02:26:55,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 02:26:55,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:26:55,505 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:26:55,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:26:55,506 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:26:55,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:26:55,507 INFO L85 PathProgramCache]: Analyzing trace with hash 922752291, now seen corresponding path program 1 times [2021-11-23 02:26:55,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:26:55,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732450852] [2021-11-23 02:26:55,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:55,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:26:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:26:55,604 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:26:55,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732450852] [2021-11-23 02:26:55,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732450852] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:26:55,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515803152] [2021-11-23 02:26:55,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:55,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:26:55,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:26:55,609 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:26:55,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:26:55,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:55,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:26:55,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:26:55,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:26:55,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:26:55,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:26:55,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515803152] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:26:55,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2028470641] [2021-11-23 02:26:55,984 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 02:26:55,985 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:26:55,991 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:26:56,002 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:26:56,002 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:26:56,188 INFO L354 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2021-11-23 02:26:56,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 44 [2021-11-23 02:26:56,273 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:26:56,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:26:56,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:26:56,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:26:56,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:26:56,577 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:26:56,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 252 treesize of output 251 [2021-11-23 02:26:56,794 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 25 treesize of output 21 [2021-11-23 02:26:56,824 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:26:56,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2028470641] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:26:56,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:26:56,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4, 4] total 11 [2021-11-23 02:26:56,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566087937] [2021-11-23 02:26:56,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:26:56,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:26:56,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:26:56,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:26:56,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:26:56,999 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 02:26:57,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:26:57,162 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2021-11-23 02:26:57,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:26:57,163 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 02:26:57,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:26:57,163 INFO L225 Difference]: With dead ends: 17 [2021-11-23 02:26:57,163 INFO L226 Difference]: Without dead ends: 12 [2021-11-23 02:26:57,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:26:57,166 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:26:57,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:26:57,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-23 02:26:57,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-23 02:26:57,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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 02:26:57,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-11-23 02:26:57,173 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2021-11-23 02:26:57,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:26:57,173 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-11-23 02:26:57,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 02:26:57,174 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-11-23 02:26:57,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 02:26:57,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:26:57,175 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:26:57,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:26:57,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:26:57,389 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:26:57,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:26:57,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1455639679, now seen corresponding path program 1 times [2021-11-23 02:26:57,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:26:57,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828007750] [2021-11-23 02:26:57,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:57,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:26:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:57,487 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 02:26:57,488 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:26:57,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828007750] [2021-11-23 02:26:57,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828007750] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:26:57,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316067169] [2021-11-23 02:26:57,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:57,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:26:57,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:26:57,493 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:26:57,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:26:57,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:57,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:26:57,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:26:57,606 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 02:26:57,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:26:57,650 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 02:26:57,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316067169] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:26:57,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [504342222] [2021-11-23 02:26:57,654 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 02:26:57,655 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:26:57,655 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:26:57,656 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:26:57,657 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:26:57,765 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:26:57,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:26:57,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-23 02:26:57,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:26:57,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:26:57,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:26:57,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:26:57,963 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:26:57,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 250 [2021-11-23 02:26:58,046 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 25 treesize of output 21 [2021-11-23 02:26:58,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:26:58,102 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 19 treesize of output 1 [2021-11-23 02:26:58,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:26:58,119 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:26:58,120 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 31 treesize of output 24 [2021-11-23 02:26:58,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:26:58,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 1 [2021-11-23 02:26:58,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:26:58,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:26:58,202 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 54 treesize of output 44 [2021-11-23 02:26:58,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:26:58,270 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 37 treesize of output 1 [2021-11-23 02:26:58,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:26:58,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:26:58,292 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 54 treesize of output 44 [2021-11-23 02:26:58,330 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:26:58,641 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '228#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= ~MAX~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (ite (<= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_~i~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 02:26:58,641 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:26:58,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:26:58,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 02:26:58,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272003355] [2021-11-23 02:26:58,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:26:58,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:26:58,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:26:58,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:26:58,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:26:58,644 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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 02:26:58,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:26:58,678 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2021-11-23 02:26:58,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:26:58,679 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) Word has length 10 [2021-11-23 02:26:58,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:26:58,680 INFO L225 Difference]: With dead ends: 21 [2021-11-23 02:26:58,680 INFO L226 Difference]: Without dead ends: 13 [2021-11-23 02:26:58,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:26:58,682 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:26:58,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:26:58,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-23 02:26:58,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-23 02:26:58,686 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 02:26:58,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-23 02:26:58,687 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2021-11-23 02:26:58,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:26:58,687 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-23 02:26:58,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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 02:26:58,688 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-23 02:26:58,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 02:26:58,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:26:58,688 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:26:58,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:26:58,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:26:58,905 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:26:58,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:26:58,905 INFO L85 PathProgramCache]: Analyzing trace with hash 895368030, now seen corresponding path program 2 times [2021-11-23 02:26:58,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:26:58,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523566807] [2021-11-23 02:26:58,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:58,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:26:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:26:59,143 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:26:59,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523566807] [2021-11-23 02:26:59,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523566807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:26:59,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314390311] [2021-11-23 02:26:59,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:26:59,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:26:59,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:26:59,149 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:26:59,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:26:59,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 02:26:59,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:26:59,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:26:59,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:26:59,229 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 15 treesize of output 11 [2021-11-23 02:26:59,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:26:59,281 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 19 treesize of output 1 [2021-11-23 02:26:59,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:26:59,297 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 0 case distinctions, treesize of input 30 treesize of output 23 [2021-11-23 02:26:59,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:26:59,371 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 1 case distinctions, treesize of input 40 treesize of output 28 [2021-11-23 02:26:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:26:59,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:26:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:26:59,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314390311] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:26:59,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:26:59,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 13 [2021-11-23 02:26:59,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022847384] [2021-11-23 02:26:59,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:26:59,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:26:59,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:26:59,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:26:59,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:26:59,552 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 02:26:59,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:26:59,641 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-11-23 02:26:59,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:26:59,642 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 02:26:59,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:26:59,643 INFO L225 Difference]: With dead ends: 19 [2021-11-23 02:26:59,643 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 02:26:59,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-23 02:26:59,644 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:26:59,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 8 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:26:59,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 02:26:59,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2021-11-23 02:26:59,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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 02:26:59,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-23 02:26:59,649 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-11-23 02:26:59,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:26:59,649 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-23 02:26:59,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 02:26:59,649 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-23 02:26:59,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 02:26:59,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:26:59,650 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:26:59,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:26:59,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:26:59,851 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:26:59,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:26:59,851 INFO L85 PathProgramCache]: Analyzing trace with hash -2127646442, now seen corresponding path program 1 times [2021-11-23 02:26:59,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:26:59,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796476752] [2021-11-23 02:26:59,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:59,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:26:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:26:59,998 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:26:59,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796476752] [2021-11-23 02:26:59,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796476752] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:26:59,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376683015] [2021-11-23 02:26:59,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:59,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:26:59,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:00,000 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:27:00,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:27:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:00,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:27:00,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:00,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-11-23 02:27:00,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 25 [2021-11-23 02:27:00,199 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 02:27:00,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:00,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:00,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 25 [2021-11-23 02:27:00,272 INFO L354 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2021-11-23 02:27:00,272 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 26 treesize of output 16 [2021-11-23 02:27:00,282 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 02:27:00,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376683015] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:00,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [468111827] [2021-11-23 02:27:00,285 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:27:00,285 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:27:00,286 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:27:00,286 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:27:00,286 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:27:00,345 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:27:00,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:27:00,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-23 02:27:00,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:27:00,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:00,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:00,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:00,480 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:27:00,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 250 [2021-11-23 02:27:00,544 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 25 treesize of output 21 [2021-11-23 02:27:00,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:00,587 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 37 treesize of output 1 [2021-11-23 02:27:00,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:00,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:00,603 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 54 treesize of output 44 [2021-11-23 02:27:00,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:00,655 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 37 treesize of output 1 [2021-11-23 02:27:00,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:00,670 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:00,670 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 54 treesize of output 44 [2021-11-23 02:27:00,884 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:27:01,291 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '501#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |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 02:27:01,292 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:27:01,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:27:01,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 11 [2021-11-23 02:27:01,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359292703] [2021-11-23 02:27:01,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:27:01,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 02:27:01,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:01,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 02:27:01,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-23 02:27:01,294 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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 02:27:01,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:01,459 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-11-23 02:27:01,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:27:01,459 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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 02:27:01,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:01,460 INFO L225 Difference]: With dead ends: 22 [2021-11-23 02:27:01,460 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 02:27:01,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-11-23 02:27:01,462 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:01,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 20 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:27:01,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 02:27:01,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-11-23 02:27:01,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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 02:27:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-11-23 02:27:01,467 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2021-11-23 02:27:01,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:01,467 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-11-23 02:27:01,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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 02:27:01,467 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-11-23 02:27:01,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 02:27:01,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:01,468 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:01,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:01,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:01,689 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:01,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:01,689 INFO L85 PathProgramCache]: Analyzing trace with hash 417448030, now seen corresponding path program 2 times [2021-11-23 02:27:01,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:01,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205173582] [2021-11-23 02:27:01,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:01,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:27:01,765 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:01,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205173582] [2021-11-23 02:27:01,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205173582] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:27:01,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932496531] [2021-11-23 02:27:01,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:27:01,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:01,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:01,767 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:27:01,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:27:01,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:27:01,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:27:01,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:27:01,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:27:01,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:27:01,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932496531] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:01,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [516768900] [2021-11-23 02:27:01,981 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:27:01,981 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:27:01,981 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:27:01,982 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:27:01,982 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:27:02,052 INFO L354 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2021-11-23 02:27:02,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 44 [2021-11-23 02:27:02,102 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:27:02,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:27:02,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:27:02,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:02,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:02,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:02,225 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:27:02,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 250 [2021-11-23 02:27:02,283 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 25 treesize of output 21 [2021-11-23 02:27:02,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:02,319 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 37 treesize of output 1 [2021-11-23 02:27:02,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:02,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:02,338 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 54 treesize of output 44 [2021-11-23 02:27:02,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-11-23 02:27:02,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:02,408 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 0 case distinctions, treesize of input 53 treesize of output 43 [2021-11-23 02:27:02,600 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:27:02,998 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '686#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |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 02:27:02,998 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:27:02,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:27:02,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-11-23 02:27:02,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651877589] [2021-11-23 02:27:02,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:27:02,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 02:27:02,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:02,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 02:27:03,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-11-23 02:27:03,000 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 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 02:27:03,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:03,117 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-11-23 02:27:03,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:27:03,118 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 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) Word has length 17 [2021-11-23 02:27:03,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:03,119 INFO L225 Difference]: With dead ends: 47 [2021-11-23 02:27:03,119 INFO L226 Difference]: Without dead ends: 26 [2021-11-23 02:27:03,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-11-23 02:27:03,120 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:03,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:27:03,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-23 02:27:03,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2021-11-23 02:27:03,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 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 02:27:03,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-23 02:27:03,126 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 17 [2021-11-23 02:27:03,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:03,126 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-23 02:27:03,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 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 02:27:03,126 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-23 02:27:03,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 02:27:03,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:03,127 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:03,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:03,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:03,341 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:03,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:03,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1101927905, now seen corresponding path program 3 times [2021-11-23 02:27:03,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:03,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073737602] [2021-11-23 02:27:03,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:03,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:03,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:03,554 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:27:03,554 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:03,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073737602] [2021-11-23 02:27:03,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073737602] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:27:03,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609809332] [2021-11-23 02:27:03,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:27:03,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:03,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:03,560 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:27:03,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:27:03,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:27:03,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:27:03,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:27:03,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:27:03,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:27:03,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609809332] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:03,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [159239937] [2021-11-23 02:27:03,961 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:27:03,962 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:27:03,962 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:27:03,962 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:27:03,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:27:04,030 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:27:04,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:27:04,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-23 02:27:04,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:27:04,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:04,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:04,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:04,158 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:27:04,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 250 [2021-11-23 02:27:04,224 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 25 treesize of output 21 [2021-11-23 02:27:04,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-23 02:27:04,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:04,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:04,283 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 30 treesize of output 23 [2021-11-23 02:27:04,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-11-23 02:27:04,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:04,364 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 0 case distinctions, treesize of input 53 treesize of output 43 [2021-11-23 02:27:04,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-11-23 02:27:04,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:04,425 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 0 case distinctions, treesize of input 53 treesize of output 43 [2021-11-23 02:27:04,601 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:27:05,187 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '916#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |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 02:27:05,187 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:27:05,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:27:05,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2021-11-23 02:27:05,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402134423] [2021-11-23 02:27:05,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:27:05,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 02:27:05,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:05,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 02:27:05,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-11-23 02:27:05,189 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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 02:27:05,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:05,557 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-11-23 02:27:05,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:27:05,557 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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) Word has length 18 [2021-11-23 02:27:05,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:05,558 INFO L225 Difference]: With dead ends: 31 [2021-11-23 02:27:05,558 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 02:27:05,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 02:27:05,560 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 34 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:05,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 45 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:27:05,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 02:27:05,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-11-23 02:27:05,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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 02:27:05,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-11-23 02:27:05,564 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 18 [2021-11-23 02:27:05,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:05,565 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-11-23 02:27:05,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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 02:27:05,565 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-11-23 02:27:05,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 02:27:05,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:05,566 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:05,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:05,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:05,766 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:05,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:05,767 INFO L85 PathProgramCache]: Analyzing trace with hash -542171517, now seen corresponding path program 4 times [2021-11-23 02:27:05,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:05,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114187123] [2021-11-23 02:27:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:05,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:27:05,981 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:05,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114187123] [2021-11-23 02:27:05,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114187123] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:27:05,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593411301] [2021-11-23 02:27:05,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:27:05,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:05,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:05,983 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:27:05,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:27:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:06,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:27:06,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:06,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:27:06,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:27:06,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593411301] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:06,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2126891262] [2021-11-23 02:27:06,413 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:27:06,413 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:27:06,413 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:27:06,414 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:27:06,414 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:27:06,473 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:27:06,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:27:06,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-23 02:27:06,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:27:06,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:06,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:06,583 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:27:06,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 252 treesize of output 251 [2021-11-23 02:27:06,698 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 25 treesize of output 21 [2021-11-23 02:27:06,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-23 02:27:06,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:06,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:06,739 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 30 treesize of output 23 [2021-11-23 02:27:06,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-11-23 02:27:06,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:06,807 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 0 case distinctions, treesize of input 53 treesize of output 43 [2021-11-23 02:27:06,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:06,862 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 37 treesize of output 1 [2021-11-23 02:27:06,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:06,874 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:06,875 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 54 treesize of output 44 [2021-11-23 02:27:07,031 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:27:07,576 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1146#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |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 02:27:07,576 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:27:07,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:27:07,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2021-11-23 02:27:07,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304039771] [2021-11-23 02:27:07,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:27:07,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 02:27:07,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:07,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 02:27:07,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2021-11-23 02:27:07,578 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 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 02:27:07,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:07,740 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-11-23 02:27:07,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 02:27:07,740 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 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) Word has length 19 [2021-11-23 02:27:07,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:07,741 INFO L225 Difference]: With dead ends: 42 [2021-11-23 02:27:07,741 INFO L226 Difference]: Without dead ends: 28 [2021-11-23 02:27:07,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 02:27:07,743 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:07,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 27 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:27:07,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-23 02:27:07,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2021-11-23 02:27:07,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 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 02:27:07,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-11-23 02:27:07,748 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 19 [2021-11-23 02:27:07,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:07,748 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-11-23 02:27:07,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 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 02:27:07,749 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-11-23 02:27:07,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 02:27:07,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:07,749 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:07,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:07,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:07,973 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:07,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:07,973 INFO L85 PathProgramCache]: Analyzing trace with hash 112992070, now seen corresponding path program 5 times [2021-11-23 02:27:07,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:07,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701627161] [2021-11-23 02:27:07,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:07,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:08,559 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:08,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701627161] [2021-11-23 02:27:08,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701627161] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:27:08,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833011331] [2021-11-23 02:27:08,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:27:08,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:08,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:08,560 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:27:08,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:27:08,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:27:08,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:27:08,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 02:27:08,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:08,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:08,796 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 23 treesize of output 1 [2021-11-23 02:27:08,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:08,871 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 0 case distinctions, treesize of input 32 treesize of output 25 [2021-11-23 02:27:08,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:08,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:08,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:08,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 41 treesize of output 37 [2021-11-23 02:27:09,216 INFO L354 Elim1Store]: treesize reduction 58, result has 26.6 percent of original size [2021-11-23 02:27:09,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 57 [2021-11-23 02:27:09,340 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:09,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:11,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:11,462 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 38 treesize of output 1 [2021-11-23 02:27:11,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 49 treesize of output 45 [2021-11-23 02:27:11,482 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-23 02:27:11,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 120 [2021-11-23 02:27:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:11,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833011331] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:11,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1751390467] [2021-11-23 02:27:11,723 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:27:11,723 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:27:11,724 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:27:11,724 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:27:11,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:27:11,785 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:27:11,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:27:11,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-23 02:27:11,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:27:11,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:11,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:11,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:11,901 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:27:11,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 250 [2021-11-23 02:27:11,948 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 25 treesize of output 21 [2021-11-23 02:27:11,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:11,980 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 19 treesize of output 1 [2021-11-23 02:27:11,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:11,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:11,992 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 31 treesize of output 24 [2021-11-23 02:27:12,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:12,042 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 37 treesize of output 1 [2021-11-23 02:27:12,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:12,056 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:12,056 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 54 treesize of output 44 [2021-11-23 02:27:12,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:12,100 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 37 treesize of output 1 [2021-11-23 02:27:12,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:12,113 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:12,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 44 [2021-11-23 02:27:12,273 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:27:12,979 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1408#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |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 02:27:12,979 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:27:12,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:27:12,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 39 [2021-11-23 02:27:12,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89260664] [2021-11-23 02:27:12,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:27:12,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-23 02:27:12,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:12,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-23 02:27:12,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1948, Unknown=2, NotChecked=0, Total=2162 [2021-11-23 02:27:12,983 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 39 states have internal predecessors, (55), 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 02:27:14,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:14,825 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2021-11-23 02:27:14,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-23 02:27:14,825 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 39 states have internal predecessors, (55), 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 20 [2021-11-23 02:27:14,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:14,826 INFO L225 Difference]: With dead ends: 96 [2021-11-23 02:27:14,826 INFO L226 Difference]: Without dead ends: 68 [2021-11-23 02:27:14,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=736, Invalid=5742, Unknown=2, NotChecked=0, Total=6480 [2021-11-23 02:27:14,830 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 103 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:14,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 192 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 499 Invalid, 0 Unknown, 120 Unchecked, 0.5s Time] [2021-11-23 02:27:14,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-23 02:27:14,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 22. [2021-11-23 02:27:14,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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 02:27:14,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-11-23 02:27:14,838 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 20 [2021-11-23 02:27:14,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:14,838 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-11-23 02:27:14,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 39 states have internal predecessors, (55), 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 02:27:14,839 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-11-23 02:27:14,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 02:27:14,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:14,840 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:14,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:15,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:15,049 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:15,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:15,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1051773213, now seen corresponding path program 6 times [2021-11-23 02:27:15,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:15,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685137881] [2021-11-23 02:27:15,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:15,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:27:15,309 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:15,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685137881] [2021-11-23 02:27:15,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685137881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:27:15,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997675071] [2021-11-23 02:27:15,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:27:15,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:15,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:15,310 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:27:15,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:27:15,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:27:15,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:27:15,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:27:15,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:15,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:15,412 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 23 treesize of output 1 [2021-11-23 02:27:15,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:15,424 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 0 case distinctions, treesize of input 32 treesize of output 25 [2021-11-23 02:27:15,570 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 02:27:15,571 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 46 treesize of output 28 [2021-11-23 02:27:15,597 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:27:15,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:15,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:15,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 25 [2021-11-23 02:27:15,769 INFO L354 Elim1Store]: treesize reduction 64, result has 32.6 percent of original size [2021-11-23 02:27:15,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 54 treesize of output 45 [2021-11-23 02:27:15,796 INFO L354 Elim1Store]: treesize reduction 44, result has 10.2 percent of original size [2021-11-23 02:27:15,797 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 42 treesize of output 23 [2021-11-23 02:27:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:27:15,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997675071] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:15,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [94197493] [2021-11-23 02:27:15,826 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:27:15,827 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:27:15,827 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:27:15,827 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:27:15,827 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:27:15,887 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:27:15,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:27:15,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-23 02:27:15,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:27:15,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:15,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:15,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:16,002 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:27:16,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 250 [2021-11-23 02:27:16,046 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 25 treesize of output 21 [2021-11-23 02:27:16,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:16,085 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 37 treesize of output 1 [2021-11-23 02:27:16,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:16,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:16,101 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 54 treesize of output 44 [2021-11-23 02:27:16,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-11-23 02:27:16,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:16,153 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 0 case distinctions, treesize of input 53 treesize of output 43 [2021-11-23 02:27:16,306 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:27:16,786 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1797#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |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 02:27:16,787 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:27:16,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:27:16,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2021-11-23 02:27:16,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782762251] [2021-11-23 02:27:16,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:27:16,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 02:27:16,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:16,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 02:27:16,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-11-23 02:27:16,789 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 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 02:27:17,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:17,354 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-11-23 02:27:17,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 02:27:17,355 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 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 21 [2021-11-23 02:27:17,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:17,355 INFO L225 Difference]: With dead ends: 41 [2021-11-23 02:27:17,356 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 02:27:17,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=209, Invalid=1513, Unknown=0, NotChecked=0, Total=1722 [2021-11-23 02:27:17,357 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 61 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:17,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 53 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:27:17,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 02:27:17,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-11-23 02:27:17,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 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 02:27:17,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-11-23 02:27:17,365 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 21 [2021-11-23 02:27:17,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:17,366 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-11-23 02:27:17,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 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 02:27:17,366 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-11-23 02:27:17,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 02:27:17,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:17,367 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:17,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:17,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 02:27:17,573 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:17,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:17,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1120734337, now seen corresponding path program 7 times [2021-11-23 02:27:17,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:17,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363152698] [2021-11-23 02:27:17,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:17,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:27:17,838 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:17,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363152698] [2021-11-23 02:27:17,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363152698] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:27:17,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893494192] [2021-11-23 02:27:17,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:27:17,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:17,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:17,839 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:27:17,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:27:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:17,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:27:17,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:27:18,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:27:18,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893494192] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:18,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [40340063] [2021-11-23 02:27:18,458 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:27:18,458 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:27:18,458 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:27:18,458 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:27:18,459 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:27:18,514 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:27:18,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:27:18,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-23 02:27:18,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:27:18,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:18,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:18,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:18,626 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:27:18,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 250 [2021-11-23 02:27:18,667 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 25 treesize of output 21 [2021-11-23 02:27:18,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:18,697 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 37 treesize of output 1 [2021-11-23 02:27:18,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:18,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:18,710 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 54 treesize of output 44 [2021-11-23 02:27:18,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-11-23 02:27:18,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:18,765 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 0 case distinctions, treesize of input 53 treesize of output 43 [2021-11-23 02:27:18,901 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:27:19,266 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2127#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |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 02:27:19,266 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:27:19,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:27:19,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2021-11-23 02:27:19,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60145362] [2021-11-23 02:27:19,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:27:19,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 02:27:19,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:19,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 02:27:19,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1303, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 02:27:19,269 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 32 states, 32 states have (on average 1.25) internal successors, (40), 32 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 02:27:19,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:19,487 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2021-11-23 02:27:19,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 02:27:19,488 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 32 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) Word has length 28 [2021-11-23 02:27:19,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:19,488 INFO L225 Difference]: With dead ends: 58 [2021-11-23 02:27:19,488 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 02:27:19,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=349, Invalid=1543, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 02:27:19,490 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:19,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 42 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:27:19,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 02:27:19,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-11-23 02:27:19,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 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 02:27:19,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-11-23 02:27:19,498 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 28 [2021-11-23 02:27:19,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:19,499 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-11-23 02:27:19,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 32 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 02:27:19,499 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-11-23 02:27:19,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 02:27:19,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:19,500 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:19,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:19,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:19,728 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:19,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:19,729 INFO L85 PathProgramCache]: Analyzing trace with hash -833538274, now seen corresponding path program 8 times [2021-11-23 02:27:19,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:19,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911310860] [2021-11-23 02:27:19,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:19,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:20,369 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:20,370 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:20,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911310860] [2021-11-23 02:27:20,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911310860] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:27:20,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801257642] [2021-11-23 02:27:20,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:27:20,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:20,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:20,386 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:27:20,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:27:20,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-23 02:27:20,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:27:20,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 02:27:20,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:20,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:20,698 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 23 treesize of output 1 [2021-11-23 02:27:20,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:20,716 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 0 case distinctions, treesize of input 32 treesize of output 25 [2021-11-23 02:27:20,986 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 02:27:20,986 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 46 treesize of output 28 [2021-11-23 02:27:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:27:21,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:21,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:21,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 25 [2021-11-23 02:27:21,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:21,171 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-11-23 02:27:21,171 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 3 case distinctions, treesize of input 54 treesize of output 1 [2021-11-23 02:27:21,187 INFO L354 Elim1Store]: treesize reduction 44, result has 10.2 percent of original size [2021-11-23 02:27:21,188 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 42 treesize of output 23 [2021-11-23 02:27:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:27:21,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801257642] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:21,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1990825749] [2021-11-23 02:27:21,228 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:27:21,229 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:27:21,229 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:27:21,229 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:27:21,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:27:21,289 INFO L354 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2021-11-23 02:27:21,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 44 [2021-11-23 02:27:21,337 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:27:21,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:27:21,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:27:21,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:21,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:21,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:21,442 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:27:21,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 250 [2021-11-23 02:27:21,487 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 25 treesize of output 21 [2021-11-23 02:27:21,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:21,516 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 37 treesize of output 1 [2021-11-23 02:27:21,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:21,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:21,528 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 54 treesize of output 44 [2021-11-23 02:27:21,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-11-23 02:27:21,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:21,575 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 0 case distinctions, treesize of input 53 treesize of output 43 [2021-11-23 02:27:21,736 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:27:22,219 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2475#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |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 02:27:22,219 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:27:22,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:27:22,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 12] total 33 [2021-11-23 02:27:22,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398730330] [2021-11-23 02:27:22,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:27:22,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 02:27:22,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:22,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 02:27:22,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1493, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 02:27:22,222 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 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 02:27:23,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:23,666 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-11-23 02:27:23,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-23 02:27:23,667 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 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 29 [2021-11-23 02:27:23,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:23,668 INFO L225 Difference]: With dead ends: 44 [2021-11-23 02:27:23,669 INFO L226 Difference]: Without dead ends: 42 [2021-11-23 02:27:23,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=385, Invalid=3397, Unknown=0, NotChecked=0, Total=3782 [2021-11-23 02:27:23,671 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 61 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:23,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 75 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:27:23,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-23 02:27:23,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-11-23 02:27:23,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 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 02:27:23,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-11-23 02:27:23,680 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 29 [2021-11-23 02:27:23,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:23,680 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-11-23 02:27:23,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 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 02:27:23,681 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-11-23 02:27:23,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 02:27:23,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:23,682 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:23,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-23 02:27:23,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:23,885 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:23,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:23,885 INFO L85 PathProgramCache]: Analyzing trace with hash 488172574, now seen corresponding path program 9 times [2021-11-23 02:27:23,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:23,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988325387] [2021-11-23 02:27:23,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:23,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:27:24,070 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:24,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988325387] [2021-11-23 02:27:24,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988325387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:27:24,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86120439] [2021-11-23 02:27:24,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:27:24,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:24,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:24,073 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:27:24,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 02:27:24,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:27:24,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:27:24,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:27:24,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:24,616 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 57 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:27:24,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 57 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:27:24,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86120439] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:24,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [497964749] [2021-11-23 02:27:24,777 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:27:24,778 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:27:24,779 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:27:24,779 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:27:24,779 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:27:24,827 INFO L354 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2021-11-23 02:27:24,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 44 [2021-11-23 02:27:24,868 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:27:24,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:27:24,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:27:24,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:24,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:24,976 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:27:24,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 252 treesize of output 251 [2021-11-23 02:27:25,099 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 25 treesize of output 21 [2021-11-23 02:27:25,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-23 02:27:25,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:25,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:25,143 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 30 treesize of output 23 [2021-11-23 02:27:25,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-11-23 02:27:25,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:25,199 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 0 case distinctions, treesize of input 53 treesize of output 43 [2021-11-23 02:27:25,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-11-23 02:27:25,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:25,249 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 0 case distinctions, treesize of input 53 treesize of output 43 [2021-11-23 02:27:25,393 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:27:25,900 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2884#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |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 02:27:25,900 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:27:25,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:27:25,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 13] total 34 [2021-11-23 02:27:25,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023629040] [2021-11-23 02:27:25,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:27:25,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-23 02:27:25,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:25,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-23 02:27:25,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1421, Unknown=0, NotChecked=0, Total=1722 [2021-11-23 02:27:25,903 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 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 02:27:26,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:26,337 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2021-11-23 02:27:26,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 02:27:26,337 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 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 35 [2021-11-23 02:27:26,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:26,338 INFO L225 Difference]: With dead ends: 93 [2021-11-23 02:27:26,338 INFO L226 Difference]: Without dead ends: 46 [2021-11-23 02:27:26,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=613, Invalid=2693, Unknown=0, NotChecked=0, Total=3306 [2021-11-23 02:27:26,340 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 144 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:26,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 77 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:27:26,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-23 02:27:26,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 38. [2021-11-23 02:27:26,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 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 02:27:26,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-11-23 02:27:26,350 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2021-11-23 02:27:26,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:26,350 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-11-23 02:27:26,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 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 02:27:26,351 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-11-23 02:27:26,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 02:27:26,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:26,352 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:26,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-23 02:27:26,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 02:27:26,561 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:26,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:26,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1448807037, now seen corresponding path program 10 times [2021-11-23 02:27:26,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:26,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548616629] [2021-11-23 02:27:26,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:26,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:26,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-23 02:27:26,936 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:26,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548616629] [2021-11-23 02:27:26,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548616629] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:27:26,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272830800] [2021-11-23 02:27:26,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:27:26,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:26,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:26,938 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:27:26,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 02:27:27,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:27,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:27:27,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-23 02:27:27,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:27,708 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-23 02:27:27,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272830800] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:27,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1160545808] [2021-11-23 02:27:27,710 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:27:27,710 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:27:27,711 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:27:27,711 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:27:27,711 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:27:27,760 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:27:27,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:27:27,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-23 02:27:27,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:27:27,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:27,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:27,866 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:27:27,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 252 treesize of output 251 [2021-11-23 02:27:27,941 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 25 treesize of output 21 [2021-11-23 02:27:27,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:27,976 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 19 treesize of output 1 [2021-11-23 02:27:27,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:27,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:27,986 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 31 treesize of output 24 [2021-11-23 02:27:28,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-11-23 02:27:28,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:28,052 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 0 case distinctions, treesize of input 53 treesize of output 43 [2021-11-23 02:27:28,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-11-23 02:27:28,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:28,097 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 0 case distinctions, treesize of input 53 treesize of output 43 [2021-11-23 02:27:28,224 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:27:28,742 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3381#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |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 02:27:28,742 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:27:28,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:27:28,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 41 [2021-11-23 02:27:28,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536256642] [2021-11-23 02:27:28,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:27:28,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-23 02:27:28,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:28,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-23 02:27:28,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1975, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 02:27:28,744 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 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 02:27:28,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:28,987 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2021-11-23 02:27:28,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 02:27:28,988 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 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 37 [2021-11-23 02:27:28,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:28,988 INFO L225 Difference]: With dead ends: 74 [2021-11-23 02:27:28,988 INFO L226 Difference]: Without dead ends: 46 [2021-11-23 02:27:28,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=548, Invalid=2422, Unknown=0, NotChecked=0, Total=2970 [2021-11-23 02:27:28,990 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 46 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:28,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 37 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:27:28,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-23 02:27:28,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2021-11-23 02:27:28,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 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 02:27:28,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-11-23 02:27:28,999 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 37 [2021-11-23 02:27:28,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:28,999 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-11-23 02:27:28,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 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 02:27:28,999 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-11-23 02:27:29,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 02:27:29,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:29,000 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:29,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:29,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 02:27:29,205 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:29,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:29,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1338348666, now seen corresponding path program 11 times [2021-11-23 02:27:29,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:29,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961882301] [2021-11-23 02:27:29,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:29,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:30,012 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:30,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961882301] [2021-11-23 02:27:30,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961882301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:27:30,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211715667] [2021-11-23 02:27:30,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:27:30,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:30,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:30,013 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:27:30,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 02:27:30,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-23 02:27:30,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:27:30,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 02:27:30,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:30,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-23 02:27:30,438 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-11-23 02:27:30,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 25 [2021-11-23 02:27:30,853 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 02:27:30,853 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 46 treesize of output 28 [2021-11-23 02:27:30,894 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 02:27:30,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:31,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:31,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 25 [2021-11-23 02:27:31,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 34 [2021-11-23 02:27:31,112 INFO L354 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2021-11-23 02:27:31,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 44 [2021-11-23 02:27:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 02:27:31,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211715667] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:31,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [278775413] [2021-11-23 02:27:31,171 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:27:31,171 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:27:31,171 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:27:31,172 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:27:31,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:27:31,224 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:27:31,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:27:31,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-23 02:27:31,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:27:31,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:31,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:31,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:31,323 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:27:31,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 250 [2021-11-23 02:27:31,377 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 25 treesize of output 21 [2021-11-23 02:27:31,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:31,406 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 37 treesize of output 1 [2021-11-23 02:27:31,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:31,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:31,418 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 54 treesize of output 44 [2021-11-23 02:27:31,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:31,459 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 37 treesize of output 1 [2021-11-23 02:27:31,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:31,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:31,472 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 54 treesize of output 44 [2021-11-23 02:27:31,617 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:27:32,206 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3831#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |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 02:27:32,206 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:27:32,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:27:32,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15, 15] total 39 [2021-11-23 02:27:32,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659828309] [2021-11-23 02:27:32,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:27:32,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-23 02:27:32,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:32,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-23 02:27:32,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1992, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 02:27:32,209 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 39 states have internal predecessors, (73), 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 02:27:34,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:34,962 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2021-11-23 02:27:34,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-23 02:27:34,963 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 39 states have internal predecessors, (73), 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 38 [2021-11-23 02:27:34,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:34,964 INFO L225 Difference]: With dead ends: 75 [2021-11-23 02:27:34,964 INFO L226 Difference]: Without dead ends: 73 [2021-11-23 02:27:34,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=683, Invalid=6973, Unknown=0, NotChecked=0, Total=7656 [2021-11-23 02:27:34,967 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 106 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:34,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 147 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 02:27:34,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-23 02:27:34,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2021-11-23 02:27:34,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 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 02:27:34,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-11-23 02:27:34,989 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 38 [2021-11-23 02:27:34,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:34,989 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-11-23 02:27:34,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 39 states have internal predecessors, (73), 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 02:27:34,990 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-11-23 02:27:34,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-23 02:27:34,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:34,991 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:35,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:35,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:35,209 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:35,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:35,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1842557574, now seen corresponding path program 12 times [2021-11-23 02:27:35,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:35,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346392157] [2021-11-23 02:27:35,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:35,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:27:35,428 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:35,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346392157] [2021-11-23 02:27:35,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346392157] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:27:35,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291366767] [2021-11-23 02:27:35,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:27:35,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:35,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:35,433 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:27:35,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 02:27:35,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:27:35,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:27:35,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:27:35,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 100 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 02:27:36,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 100 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 02:27:36,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291366767] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:36,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1565857117] [2021-11-23 02:27:36,278 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:27:36,278 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:27:36,278 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:27:36,279 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:27:36,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:27:36,330 INFO L354 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2021-11-23 02:27:36,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 44 [2021-11-23 02:27:36,376 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:27:36,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:27:36,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:27:36,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:36,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:36,475 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:27:36,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 252 treesize of output 251 [2021-11-23 02:27:36,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:27:36,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:36,576 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 37 treesize of output 1 [2021-11-23 02:27:36,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:36,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:36,588 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 54 treesize of output 44 [2021-11-23 02:27:36,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-11-23 02:27:36,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:36,636 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 0 case distinctions, treesize of input 53 treesize of output 43 [2021-11-23 02:27:36,766 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:27:37,248 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4402#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |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 02:27:37,248 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:27:37,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:27:37,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 16] total 42 [2021-11-23 02:27:37,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721400105] [2021-11-23 02:27:37,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:27:37,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-23 02:27:37,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:37,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-23 02:27:37,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=2010, Unknown=0, NotChecked=0, Total=2450 [2021-11-23 02:27:37,251 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 42 states have internal predecessors, (87), 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 02:27:37,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:37,788 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2021-11-23 02:27:37,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 02:27:37,789 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 42 states have internal predecessors, (87), 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 44 [2021-11-23 02:27:37,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:37,790 INFO L225 Difference]: With dead ends: 116 [2021-11-23 02:27:37,790 INFO L226 Difference]: Without dead ends: 56 [2021-11-23 02:27:37,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=911, Invalid=3919, Unknown=0, NotChecked=0, Total=4830 [2021-11-23 02:27:37,792 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 222 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:37,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 76 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:27:37,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-23 02:27:37,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2021-11-23 02:27:37,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 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 02:27:37,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-11-23 02:27:37,804 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2021-11-23 02:27:37,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:37,804 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-11-23 02:27:37,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 42 states have internal predecessors, (87), 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 02:27:37,805 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-11-23 02:27:37,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 02:27:37,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:37,806 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:37,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:38,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 02:27:38,013 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:38,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:38,013 INFO L85 PathProgramCache]: Analyzing trace with hash 629233025, now seen corresponding path program 13 times [2021-11-23 02:27:38,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:38,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606001734] [2021-11-23 02:27:38,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:38,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:38,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:38,415 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 11 proven. 49 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 02:27:38,415 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:38,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606001734] [2021-11-23 02:27:38,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606001734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:27:38,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952684691] [2021-11-23 02:27:38,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:27:38,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:38,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:38,417 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:27:38,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 02:27:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:38,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:27:38,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 02:27:38,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:39,377 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 02:27:39,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952684691] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:39,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1523063731] [2021-11-23 02:27:39,379 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:27:39,379 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:27:39,380 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:27:39,380 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:27:39,380 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:27:39,433 INFO L354 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2021-11-23 02:27:39,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 44 [2021-11-23 02:27:39,481 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:27:39,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:27:39,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:27:39,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:39,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:39,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:39,587 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:27:39,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 250 [2021-11-23 02:27:39,630 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 25 treesize of output 21 [2021-11-23 02:27:39,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-23 02:27:39,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:39,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:39,669 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 30 treesize of output 23 [2021-11-23 02:27:39,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:39,708 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 37 treesize of output 1 [2021-11-23 02:27:39,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:39,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:39,724 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 54 treesize of output 44 [2021-11-23 02:27:39,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:39,767 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 37 treesize of output 1 [2021-11-23 02:27:39,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:39,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:39,782 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 54 treesize of output 44 [2021-11-23 02:27:39,922 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:27:40,525 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5020#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |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 02:27:40,526 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:27:40,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:27:40,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 50 [2021-11-23 02:27:40,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243473110] [2021-11-23 02:27:40,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:27:40,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-23 02:27:40,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:40,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-23 02:27:40,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=2761, Unknown=0, NotChecked=0, Total=3306 [2021-11-23 02:27:40,528 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 50 states, 50 states have (on average 1.16) internal successors, (58), 50 states have internal predecessors, (58), 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 02:27:40,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:40,830 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2021-11-23 02:27:40,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 02:27:40,831 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.16) internal successors, (58), 50 states have internal predecessors, (58), 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 46 [2021-11-23 02:27:40,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:40,831 INFO L225 Difference]: With dead ends: 90 [2021-11-23 02:27:40,832 INFO L226 Difference]: Without dead ends: 55 [2021-11-23 02:27:40,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1753 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=756, Invalid=3276, Unknown=0, NotChecked=0, Total=4032 [2021-11-23 02:27:40,834 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 52 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:40,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 55 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:27:40,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-23 02:27:40,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2021-11-23 02:27:40,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 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 02:27:40,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-11-23 02:27:40,847 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 46 [2021-11-23 02:27:40,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:40,847 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-11-23 02:27:40,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.16) internal successors, (58), 50 states have internal predecessors, (58), 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 02:27:40,848 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-11-23 02:27:40,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 02:27:40,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:40,849 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 8, 8, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:40,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:41,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 02:27:41,061 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:41,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:41,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1837953758, now seen corresponding path program 14 times [2021-11-23 02:27:41,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:41,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280818957] [2021-11-23 02:27:41,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:41,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:42,554 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:42,554 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:42,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280818957] [2021-11-23 02:27:42,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280818957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:27:42,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134900814] [2021-11-23 02:27:42,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:27:42,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:42,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:42,555 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:27:42,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 02:27:43,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-23 02:27:43,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:27:43,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-23 02:27:43,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:43,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:43,605 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 23 treesize of output 1 [2021-11-23 02:27:43,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:43,656 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 0 case distinctions, treesize of input 32 treesize of output 25 [2021-11-23 02:27:43,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:43,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:43,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:43,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 41 treesize of output 37 [2021-11-23 02:27:44,317 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-23 02:27:44,317 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 55 treesize of output 31 [2021-11-23 02:27:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-23 02:27:44,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:44,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:44,985 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 38 treesize of output 1 [2021-11-23 02:27:44,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 47 treesize of output 43 [2021-11-23 02:27:44,999 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-23 02:27:45,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 95 [2021-11-23 02:27:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 1 proven. 114 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-23 02:27:45,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134900814] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:45,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1732567698] [2021-11-23 02:27:45,078 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:27:45,078 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:27:45,078 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:27:45,079 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:27:45,079 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:27:45,135 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:27:45,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:27:45,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-23 02:27:45,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:27:45,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:45,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:45,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:45,232 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:27:45,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 250 [2021-11-23 02:27:45,283 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 25 treesize of output 21 [2021-11-23 02:27:45,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-23 02:27:45,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:45,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:45,325 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 30 treesize of output 23 [2021-11-23 02:27:45,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:45,361 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 37 treesize of output 1 [2021-11-23 02:27:45,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:45,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:45,377 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 54 treesize of output 44 [2021-11-23 02:27:45,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-11-23 02:27:45,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:45,425 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 0 case distinctions, treesize of input 53 treesize of output 43 [2021-11-23 02:27:45,541 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:27:46,361 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5579#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |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 02:27:46,361 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:27:46,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:27:46,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 18, 18] total 56 [2021-11-23 02:27:46,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562087853] [2021-11-23 02:27:46,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:27:46,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-23 02:27:46,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:46,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-23 02:27:46,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=3800, Unknown=0, NotChecked=0, Total=4032 [2021-11-23 02:27:46,364 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 56 states have internal predecessors, (111), 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 02:27:52,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:52,283 INFO L93 Difference]: Finished difference Result 108 states and 123 transitions. [2021-11-23 02:27:52,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-23 02:27:52,284 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 56 states have internal predecessors, (111), 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 47 [2021-11-23 02:27:52,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:52,285 INFO L225 Difference]: With dead ends: 108 [2021-11-23 02:27:52,285 INFO L226 Difference]: Without dead ends: 106 [2021-11-23 02:27:52,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3144 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1190, Invalid=13572, Unknown=0, NotChecked=0, Total=14762 [2021-11-23 02:27:52,287 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 129 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 2156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:52,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 286 Invalid, 2156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 1829 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-23 02:27:52,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-23 02:27:52,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 54. [2021-11-23 02:27:52,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 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 02:27:52,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-11-23 02:27:52,304 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 47 [2021-11-23 02:27:52,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:52,305 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-11-23 02:27:52,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 56 states have internal predecessors, (111), 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 02:27:52,305 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-11-23 02:27:52,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 02:27:52,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:52,306 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:52,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:52,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 02:27:52,520 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:52,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:52,521 INFO L85 PathProgramCache]: Analyzing trace with hash -32974882, now seen corresponding path program 15 times [2021-11-23 02:27:52,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:52,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461560384] [2021-11-23 02:27:52,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:52,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:27:52,786 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:52,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461560384] [2021-11-23 02:27:52,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461560384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:27:52,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667709820] [2021-11-23 02:27:52,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:27:52,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:52,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:52,787 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:27:52,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 02:27:52,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:27:52,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:27:52,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:27:52,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 155 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-23 02:27:53,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:53,834 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 155 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-23 02:27:53,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667709820] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:53,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1305558726] [2021-11-23 02:27:53,836 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:27:53,836 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:27:53,836 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:27:53,836 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:27:53,837 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:27:53,884 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:27:53,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:27:53,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-23 02:27:53,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:27:53,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:53,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:53,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:53,993 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:27:53,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 250 [2021-11-23 02:27:54,043 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 25 treesize of output 21 [2021-11-23 02:27:54,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:54,077 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 19 treesize of output 1 [2021-11-23 02:27:54,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:54,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:54,088 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 31 treesize of output 24 [2021-11-23 02:27:54,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:54,122 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 37 treesize of output 1 [2021-11-23 02:27:54,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:54,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:54,136 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 54 treesize of output 44 [2021-11-23 02:27:54,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:54,170 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 37 treesize of output 1 [2021-11-23 02:27:54,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:54,179 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:54,179 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 54 treesize of output 44 [2021-11-23 02:27:54,285 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:27:54,852 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6306#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |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 02:27:54,853 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:27:54,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:27:54,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 19] total 50 [2021-11-23 02:27:54,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131076345] [2021-11-23 02:27:54,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:27:54,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-23 02:27:54,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:54,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-23 02:27:54,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=2706, Unknown=0, NotChecked=0, Total=3306 [2021-11-23 02:27:54,855 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 50 states, 50 states have (on average 2.06) internal successors, (103), 50 states have internal predecessors, (103), 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 02:27:55,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:55,505 INFO L93 Difference]: Finished difference Result 139 states and 149 transitions. [2021-11-23 02:27:55,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-23 02:27:55,506 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 50 states have internal predecessors, (103), 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 53 [2021-11-23 02:27:55,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:55,507 INFO L225 Difference]: With dead ends: 139 [2021-11-23 02:27:55,507 INFO L226 Difference]: Without dead ends: 66 [2021-11-23 02:27:55,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2261 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1263, Invalid=5379, Unknown=0, NotChecked=0, Total=6642 [2021-11-23 02:27:55,509 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 238 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:55,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 95 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:27:55,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-23 02:27:55,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2021-11-23 02:27:55,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 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 02:27:55,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-11-23 02:27:55,526 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2021-11-23 02:27:55,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:55,526 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-11-23 02:27:55,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 50 states have internal predecessors, (103), 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 02:27:55,526 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-11-23 02:27:55,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 02:27:55,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:55,528 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:55,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:55,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:55,741 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:55,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:55,741 INFO L85 PathProgramCache]: Analyzing trace with hash 957537411, now seen corresponding path program 16 times [2021-11-23 02:27:55,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:55,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993980516] [2021-11-23 02:27:55,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:55,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 16 proven. 71 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-23 02:27:56,206 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:56,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993980516] [2021-11-23 02:27:56,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993980516] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:27:56,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916001030] [2021-11-23 02:27:56,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:27:56,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:56,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:56,207 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:27:56,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 02:27:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:56,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 02:27:56,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:56,698 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 21 proven. 66 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-23 02:27:56,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 21 proven. 66 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-23 02:27:57,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916001030] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:57,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1907212865] [2021-11-23 02:27:57,381 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:27:57,381 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:27:57,382 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:27:57,382 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:27:57,382 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:27:57,424 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:27:57,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:27:57,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-23 02:27:57,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:27:57,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:57,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:57,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:57,506 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:27:57,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 250 [2021-11-23 02:27:57,547 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 25 treesize of output 21 [2021-11-23 02:27:57,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-23 02:27:57,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:57,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:57,582 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 30 treesize of output 23 [2021-11-23 02:27:57,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:57,620 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 37 treesize of output 1 [2021-11-23 02:27:57,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:57,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:57,631 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 54 treesize of output 44 [2021-11-23 02:27:57,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:57,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 1 [2021-11-23 02:27:57,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:57,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:57,680 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 54 treesize of output 44 [2021-11-23 02:27:57,820 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:27:58,356 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7045#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |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 02:27:58,356 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:27:58,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:27:58,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 59 [2021-11-23 02:27:58,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794489773] [2021-11-23 02:27:58,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:27:58,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-23 02:27:58,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:58,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-23 02:27:58,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=734, Invalid=3688, Unknown=0, NotChecked=0, Total=4422 [2021-11-23 02:27:58,358 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 59 states have internal predecessors, (67), 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 02:27:58,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:58,721 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2021-11-23 02:27:58,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-23 02:27:58,722 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 59 states have internal predecessors, (67), 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 55 [2021-11-23 02:27:58,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:58,722 INFO L225 Difference]: With dead ends: 106 [2021-11-23 02:27:58,722 INFO L226 Difference]: Without dead ends: 64 [2021-11-23 02:27:58,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2407 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1024, Invalid=4378, Unknown=0, NotChecked=0, Total=5402 [2021-11-23 02:27:58,724 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 63 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:58,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 61 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:27:58,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-23 02:27:58,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2021-11-23 02:27:58,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 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 02:27:58,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2021-11-23 02:27:58,739 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 55 [2021-11-23 02:27:58,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:58,739 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2021-11-23 02:27:58,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 59 states have internal predecessors, (67), 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 02:27:58,740 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2021-11-23 02:27:58,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 02:27:58,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:58,741 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 10, 10, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:58,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:58,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:58,941 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:58,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:58,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1770653754, now seen corresponding path program 17 times [2021-11-23 02:27:58,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:58,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726368161] [2021-11-23 02:27:58,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:58,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:28:00,405 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:00,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726368161] [2021-11-23 02:28:00,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726368161] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:28:00,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000486837] [2021-11-23 02:28:00,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:28:00,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:28:00,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:28:00,422 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:28:00,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 02:28:01,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-23 02:28:01,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:28:01,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-23 02:28:01,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:28:01,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-23 02:28:01,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:01,846 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 0 case distinctions, treesize of input 32 treesize of output 25 [2021-11-23 02:28:02,605 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 02:28:02,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 28 [2021-11-23 02:28:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-23 02:28:02,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:28:03,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:28:03,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 25 [2021-11-23 02:28:03,387 INFO L354 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2021-11-23 02:28:03,387 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 26 treesize of output 16 [2021-11-23 02:28:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-23 02:28:03,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000486837] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:28:03,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [124080794] [2021-11-23 02:28:03,446 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:28:03,446 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:28:03,447 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:28:03,447 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:28:03,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:28:03,495 INFO L354 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2021-11-23 02:28:03,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 44 [2021-11-23 02:28:03,534 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:28:03,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:28:03,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:28:03,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:03,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:03,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:03,631 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:28:03,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 250 [2021-11-23 02:28:03,677 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 25 treesize of output 21 [2021-11-23 02:28:03,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-23 02:28:03,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:03,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:28:03,715 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 30 treesize of output 23 [2021-11-23 02:28:03,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-11-23 02:28:03,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:03,764 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 0 case distinctions, treesize of input 53 treesize of output 43 [2021-11-23 02:28:03,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-11-23 02:28:03,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:03,819 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 0 case distinctions, treesize of input 53 treesize of output 43 [2021-11-23 02:28:03,952 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:28:04,934 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7707#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |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 02:28:04,934 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:28:04,934 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:28:04,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 21, 21] total 65 [2021-11-23 02:28:04,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620929253] [2021-11-23 02:28:04,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:28:04,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-23 02:28:04,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:04,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-23 02:28:04,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=5015, Unknown=0, NotChecked=0, Total=5256 [2021-11-23 02:28:04,937 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 65 states, 65 states have (on average 2.0307692307692307) internal successors, (132), 65 states have internal predecessors, (132), 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 02:28:14,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:14,945 INFO L93 Difference]: Finished difference Result 164 states and 180 transitions. [2021-11-23 02:28:14,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-11-23 02:28:14,946 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0307692307692307) internal successors, (132), 65 states have internal predecessors, (132), 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 56 [2021-11-23 02:28:14,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:14,946 INFO L225 Difference]: With dead ends: 164 [2021-11-23 02:28:14,947 INFO L226 Difference]: Without dead ends: 162 [2021-11-23 02:28:14,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7013 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=2141, Invalid=27271, Unknown=0, NotChecked=0, Total=29412 [2021-11-23 02:28:14,950 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 266 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 822 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 3301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 822 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:14,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 362 Invalid, 3301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [822 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 02:28:14,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-23 02:28:14,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 63. [2021-11-23 02:28:14,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 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 02:28:14,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-11-23 02:28:14,970 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 56 [2021-11-23 02:28:14,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:14,970 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-11-23 02:28:14,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0307692307692307) internal successors, (132), 65 states have internal predecessors, (132), 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 02:28:14,970 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-11-23 02:28:14,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-23 02:28:14,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:14,971 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:28:14,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 02:28:15,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-23 02:28:15,171 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:15,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:15,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1648062778, now seen corresponding path program 18 times [2021-11-23 02:28:15,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:15,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552185977] [2021-11-23 02:28:15,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:15,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:28:15,473 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:15,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552185977] [2021-11-23 02:28:15,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552185977] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:28:15,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084791] [2021-11-23 02:28:15,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:28:15,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:28:15,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:28:15,482 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:28:15,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 02:28:15,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:28:15,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:28:15,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 02:28:15,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:28:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 222 proven. 21 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-23 02:28:16,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:28:16,672 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 222 proven. 21 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-23 02:28:16,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084791] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:28:16,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1496741190] [2021-11-23 02:28:16,674 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:28:16,674 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:28:16,674 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:28:16,675 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:28:16,675 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:28:16,717 INFO L354 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2021-11-23 02:28:16,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 44 [2021-11-23 02:28:16,767 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:28:16,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:28:16,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:28:16,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:16,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:16,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:16,848 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:28:16,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 250 [2021-11-23 02:28:16,882 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 25 treesize of output 21 [2021-11-23 02:28:16,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:16,917 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 19 treesize of output 1 [2021-11-23 02:28:16,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:16,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:28:16,926 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 31 treesize of output 24 [2021-11-23 02:28:16,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-11-23 02:28:16,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:16,968 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 0 case distinctions, treesize of input 53 treesize of output 43 [2021-11-23 02:28:16,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:16,993 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 37 treesize of output 1 [2021-11-23 02:28:17,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:17,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:28:17,002 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 54 treesize of output 44 [2021-11-23 02:28:17,132 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:28:17,831 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8674#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |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 02:28:17,831 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:28:17,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:28:17,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23, 22] total 58 [2021-11-23 02:28:17,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779019617] [2021-11-23 02:28:17,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:28:17,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-23 02:28:17,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:17,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-23 02:28:17,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=790, Invalid=3500, Unknown=0, NotChecked=0, Total=4290 [2021-11-23 02:28:17,833 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 58 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 58 states have internal predecessors, (119), 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 02:28:18,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:18,551 INFO L93 Difference]: Finished difference Result 162 states and 173 transitions. [2021-11-23 02:28:18,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-23 02:28:18,552 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 58 states have internal predecessors, (119), 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 62 [2021-11-23 02:28:18,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:18,552 INFO L225 Difference]: With dead ends: 162 [2021-11-23 02:28:18,553 INFO L226 Difference]: Without dead ends: 76 [2021-11-23 02:28:18,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3016 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1678, Invalid=7064, Unknown=0, NotChecked=0, Total=8742 [2021-11-23 02:28:18,554 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 300 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:18,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 125 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:28:18,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-23 02:28:18,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 65. [2021-11-23 02:28:18,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 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 02:28:18,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2021-11-23 02:28:18,570 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2021-11-23 02:28:18,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:18,570 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2021-11-23 02:28:18,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 58 states have internal predecessors, (119), 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 02:28:18,571 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2021-11-23 02:28:18,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 02:28:18,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:18,571 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:28:18,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 02:28:18,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:28:18,777 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:18,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:18,777 INFO L85 PathProgramCache]: Analyzing trace with hash 602508929, now seen corresponding path program 19 times [2021-11-23 02:28:18,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:18,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184800084] [2021-11-23 02:28:18,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:18,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 22 proven. 97 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-23 02:28:19,372 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:19,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184800084] [2021-11-23 02:28:19,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184800084] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:28:19,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981958827] [2021-11-23 02:28:19,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:28:19,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:28:19,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:28:19,375 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:28:19,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 02:28:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:19,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 02:28:19,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:28:19,941 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 28 proven. 91 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-23 02:28:19,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:28:20,794 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 28 proven. 91 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-23 02:28:20,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981958827] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:28:20,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1719903603] [2021-11-23 02:28:20,795 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:28:20,796 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:28:20,796 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:28:20,796 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:28:20,796 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:28:20,859 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:28:20,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:28:20,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-23 02:28:20,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:28:20,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:20,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:28:20,960 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:28:20,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 252 treesize of output 251 [2021-11-23 02:28:21,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:28:21,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-11-23 02:28:21,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:21,057 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 0 case distinctions, treesize of input 53 treesize of output 43 [2021-11-23 02:28:21,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-11-23 02:28:21,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:21,103 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 0 case distinctions, treesize of input 53 treesize of output 43 [2021-11-23 02:28:21,222 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:28:21,683 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9534#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |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 02:28:21,683 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:28:21,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:28:21,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 68 [2021-11-23 02:28:21,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746290750] [2021-11-23 02:28:21,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:28:21,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-23 02:28:21,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:21,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-23 02:28:21,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=927, Invalid=4773, Unknown=0, NotChecked=0, Total=5700 [2021-11-23 02:28:21,686 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 68 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 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 02:28:22,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:22,103 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2021-11-23 02:28:22,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-23 02:28:22,103 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 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 64 [2021-11-23 02:28:22,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:22,104 INFO L225 Difference]: With dead ends: 122 [2021-11-23 02:28:22,104 INFO L226 Difference]: Without dead ends: 73 [2021-11-23 02:28:22,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3192 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1353, Invalid=5787, Unknown=0, NotChecked=0, Total=7140 [2021-11-23 02:28:22,105 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 63 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:22,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 54 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:28:22,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-23 02:28:22,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2021-11-23 02:28:22,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 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 02:28:22,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-11-23 02:28:22,119 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 64 [2021-11-23 02:28:22,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:22,120 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-11-23 02:28:22,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 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 02:28:22,120 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-11-23 02:28:22,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 02:28:22,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:22,120 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 12, 12, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:28:22,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-23 02:28:22,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:28:22,321 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:22,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:22,321 INFO L85 PathProgramCache]: Analyzing trace with hash -737317218, now seen corresponding path program 20 times [2021-11-23 02:28:22,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:22,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798713222] [2021-11-23 02:28:22,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:22,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:22,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 78 proven. 277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:28:24,020 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:24,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798713222] [2021-11-23 02:28:24,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798713222] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:28:24,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537804057] [2021-11-23 02:28:24,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:28:24,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:28:24,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:28:24,028 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:28:24,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 02:28:26,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-23 02:28:26,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:28:26,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-23 02:28:26,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:28:27,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:27,589 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 23 treesize of output 1 [2021-11-23 02:28:27,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:27,687 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 0 case distinctions, treesize of input 32 treesize of output 25 [2021-11-23 02:28:27,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:27,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:27,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:27,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:28:27,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 37 [2021-11-23 02:28:28,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:28:28,803 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 3 case distinctions, treesize of input 47 treesize of output 31 [2021-11-23 02:28:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 355 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:28:28,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:28:29,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:28:29,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 25 [2021-11-23 02:28:29,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 47 treesize of output 43 [2021-11-23 02:28:29,977 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-23 02:28:29,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 203 [2021-11-23 02:28:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 250 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 02:28:30,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537804057] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:28:30,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [113896191] [2021-11-23 02:28:30,686 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:28:30,686 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:28:30,686 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:28:30,687 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:28:30,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:28:30,739 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:28:30,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:28:30,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-23 02:28:30,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:28:30,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:30,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:28:30,819 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:28:30,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 252 treesize of output 251 [2021-11-23 02:28:30,876 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 25 treesize of output 21 [2021-11-23 02:28:30,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:30,900 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 37 treesize of output 1 [2021-11-23 02:28:30,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:30,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:28:30,922 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 54 treesize of output 44 [2021-11-23 02:28:30,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:30,957 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 37 treesize of output 1 [2021-11-23 02:28:30,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:30,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:28:30,969 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 54 treesize of output 44 [2021-11-23 02:28:31,100 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:28:31,917 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10325#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |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 02:28:31,917 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:28:31,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:28:31,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 24] total 98 [2021-11-23 02:28:31,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011270474] [2021-11-23 02:28:31,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:28:31,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-23 02:28:31,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:31,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-23 02:28:31,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=10343, Unknown=0, NotChecked=0, Total=11130 [2021-11-23 02:28:31,919 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 98 states, 98 states have (on average 1.8061224489795917) internal successors, (177), 98 states have internal predecessors, (177), 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 02:28:51,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:51,160 INFO L93 Difference]: Finished difference Result 347 states and 376 transitions. [2021-11-23 02:28:51,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2021-11-23 02:28:51,161 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.8061224489795917) internal successors, (177), 98 states have internal predecessors, (177), 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 65 [2021-11-23 02:28:51,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:51,163 INFO L225 Difference]: With dead ends: 347 [2021-11-23 02:28:51,163 INFO L226 Difference]: Without dead ends: 306 [2021-11-23 02:28:51,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28013 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=6702, Invalid=80618, Unknown=0, NotChecked=0, Total=87320 [2021-11-23 02:28:51,168 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 563 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 3673 mSolverCounterSat, 1485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 5158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1485 IncrementalHoareTripleChecker+Valid, 3673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:51,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [563 Valid, 643 Invalid, 5158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1485 Valid, 3673 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-23 02:28:51,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-23 02:28:51,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 89. [2021-11-23 02:28:51,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.125) internal successors, (99), 88 states have internal predecessors, (99), 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 02:28:51,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2021-11-23 02:28:51,197 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 65 [2021-11-23 02:28:51,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:51,197 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2021-11-23 02:28:51,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.8061224489795917) internal successors, (177), 98 states have internal predecessors, (177), 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 02:28:51,197 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2021-11-23 02:28:51,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 02:28:51,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:51,198 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:28:51,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-23 02:28:51,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-23 02:28:51,398 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:51,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:51,399 INFO L85 PathProgramCache]: Analyzing trace with hash -810712162, now seen corresponding path program 21 times [2021-11-23 02:28:51,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:51,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366702280] [2021-11-23 02:28:51,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:51,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:51,810 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:28:51,810 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:51,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366702280] [2021-11-23 02:28:51,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366702280] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:28:51,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870245849] [2021-11-23 02:28:51,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:28:51,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:28:51,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:28:51,811 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:28:51,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-23 02:28:51,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:28:51,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:28:51,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 02:28:51,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:28:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 301 proven. 28 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 02:28:52,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:28:53,293 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 301 proven. 28 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 02:28:53,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870245849] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:28:53,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [966740447] [2021-11-23 02:28:53,295 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:28:53,295 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:28:53,296 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:28:53,296 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:28:53,296 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:28:53,350 INFO L354 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2021-11-23 02:28:53,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 44 [2021-11-23 02:28:53,390 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:28:53,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:28:53,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:28:53,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:53,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:53,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:53,465 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:28:53,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 250 [2021-11-23 02:28:53,498 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 25 treesize of output 21 [2021-11-23 02:28:53,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-23 02:28:53,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:53,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:28:53,527 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 30 treesize of output 23 [2021-11-23 02:28:53,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-11-23 02:28:53,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:53,569 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 0 case distinctions, treesize of input 53 treesize of output 43 [2021-11-23 02:28:53,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:53,602 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 37 treesize of output 1 [2021-11-23 02:28:53,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:53,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:28:53,630 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 54 treesize of output 44 [2021-11-23 02:28:53,734 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:28:54,365 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11838#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |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 02:28:54,365 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:28:54,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:28:54,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 26, 25] total 66 [2021-11-23 02:28:54,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398858624] [2021-11-23 02:28:54,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:28:54,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-23 02:28:54,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:54,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-23 02:28:54,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1007, Invalid=4395, Unknown=0, NotChecked=0, Total=5402 [2021-11-23 02:28:54,368 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 66 states have internal predecessors, (135), 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 02:28:55,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:55,287 INFO L93 Difference]: Finished difference Result 226 states and 236 transitions. [2021-11-23 02:28:55,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-23 02:28:55,287 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 66 states have internal predecessors, (135), 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 71 [2021-11-23 02:28:55,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:55,288 INFO L225 Difference]: With dead ends: 226 [2021-11-23 02:28:55,288 INFO L226 Difference]: Without dead ends: 169 [2021-11-23 02:28:55,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3877 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2153, Invalid=8977, Unknown=0, NotChecked=0, Total=11130 [2021-11-23 02:28:55,290 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 342 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:55,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 178 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:28:55,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-23 02:28:55,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 80. [2021-11-23 02:28:55,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.1139240506329113) internal successors, (88), 79 states have internal predecessors, (88), 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 02:28:55,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2021-11-23 02:28:55,334 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 71 [2021-11-23 02:28:55,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:55,334 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2021-11-23 02:28:55,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 66 states have internal predecessors, (135), 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 02:28:55,335 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2021-11-23 02:28:55,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 02:28:55,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:55,336 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 8, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:28:55,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-23 02:28:55,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-23 02:28:55,545 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:55,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:55,545 INFO L85 PathProgramCache]: Analyzing trace with hash 904450947, now seen corresponding path program 22 times [2021-11-23 02:28:55,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:55,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333172142] [2021-11-23 02:28:55,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:55,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 29 proven. 127 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-23 02:28:56,243 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:56,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333172142] [2021-11-23 02:28:56,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333172142] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:28:56,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391849171] [2021-11-23 02:28:56,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:28:56,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:28:56,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:28:56,245 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:28:56,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-23 02:28:56,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:56,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 02:28:56,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:28:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 36 proven. 120 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-23 02:28:56,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:28:57,943 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 36 proven. 120 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-23 02:28:57,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391849171] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:28:57,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [203556210] [2021-11-23 02:28:57,944 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:28:57,945 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:28:57,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:28:57,945 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:28:57,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:28:57,996 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:28:57,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:28:58,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-23 02:28:58,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:28:58,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:58,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:58,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:58,068 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:28:58,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 250 [2021-11-23 02:28:58,114 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 25 treesize of output 21 [2021-11-23 02:28:58,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:58,136 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 19 treesize of output 1 [2021-11-23 02:28:58,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:58,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:28:58,145 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 31 treesize of output 24 [2021-11-23 02:28:58,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-11-23 02:28:58,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:58,221 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 0 case distinctions, treesize of input 53 treesize of output 43 [2021-11-23 02:28:58,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:58,254 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 37 treesize of output 1 [2021-11-23 02:28:58,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:58,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:28:58,263 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 54 treesize of output 44 [2021-11-23 02:28:58,392 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:28:58,993 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12884#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |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 02:28:58,993 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:28:58,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:28:58,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 77 [2021-11-23 02:28:58,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707606058] [2021-11-23 02:28:58,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:28:58,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-23 02:28:58,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:58,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-23 02:28:58,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1183, Invalid=5957, Unknown=0, NotChecked=0, Total=7140 [2021-11-23 02:28:58,996 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 77 states, 77 states have (on average 1.103896103896104) internal successors, (85), 77 states have internal predecessors, (85), 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 02:28:59,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:59,503 INFO L93 Difference]: Finished difference Result 233 states and 249 transitions. [2021-11-23 02:28:59,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-23 02:28:59,503 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.103896103896104) internal successors, (85), 77 states have internal predecessors, (85), 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 73 [2021-11-23 02:28:59,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:59,504 INFO L225 Difference]: With dead ends: 233 [2021-11-23 02:28:59,504 INFO L226 Difference]: Without dead ends: 171 [2021-11-23 02:28:59,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4034 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1720, Invalid=7210, Unknown=0, NotChecked=0, Total=8930 [2021-11-23 02:28:59,506 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 118 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:59,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 74 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:28:59,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-23 02:28:59,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 81. [2021-11-23 02:28:59,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1125) internal successors, (89), 80 states have internal predecessors, (89), 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 02:28:59,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2021-11-23 02:28:59,561 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 73 [2021-11-23 02:28:59,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:59,562 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2021-11-23 02:28:59,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.103896103896104) internal successors, (85), 77 states have internal predecessors, (85), 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 02:28:59,562 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2021-11-23 02:28:59,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 02:28:59,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:59,563 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 14, 14, 8, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:28:59,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-23 02:28:59,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:28:59,764 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:59,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:59,764 INFO L85 PathProgramCache]: Analyzing trace with hash -328023034, now seen corresponding path program 23 times [2021-11-23 02:28:59,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:59,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650922282] [2021-11-23 02:28:59,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:59,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 473 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:29:01,886 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:01,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650922282] [2021-11-23 02:29:01,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650922282] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:29:01,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968283906] [2021-11-23 02:29:01,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:29:01,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:01,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:01,887 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:29:01,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 02:29:14,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-23 02:29:14,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:29:14,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 94 conjunts are in the unsatisfiable core [2021-11-23 02:29:14,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:15,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:15,655 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 23 treesize of output 1 [2021-11-23 02:29:15,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:15,743 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 0 case distinctions, treesize of input 32 treesize of output 25 [2021-11-23 02:29:15,768 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-11-23 02:29:15,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 37 [2021-11-23 02:29:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 8 proven. 437 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:29:17,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:29:17,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:29:17,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 25 [2021-11-23 02:29:17,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 47 treesize of output 43 [2021-11-23 02:29:17,825 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-23 02:29:17,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 203 [2021-11-23 02:29:18,744 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 337 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-23 02:29:18,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968283906] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:29:18,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [381120966] [2021-11-23 02:29:18,745 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:29:18,746 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:29:18,746 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:29:18,746 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:29:18,746 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:29:18,797 INFO L354 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2021-11-23 02:29:18,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 44 [2021-11-23 02:29:18,834 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:29:18,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:29:18,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:29:18,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:18,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:29:18,910 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:29:18,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 252 treesize of output 251 [2021-11-23 02:29:19,002 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 25 treesize of output 21 [2021-11-23 02:29:19,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-11-23 02:29:19,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:19,056 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 0 case distinctions, treesize of input 53 treesize of output 43 [2021-11-23 02:29:19,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:19,090 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 37 treesize of output 1 [2021-11-23 02:29:19,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:19,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:29:19,100 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 54 treesize of output 44 [2021-11-23 02:29:19,210 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:29:20,070 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13906#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |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 02:29:20,070 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:29:20,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:29:20,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 37, 27] total 89 [2021-11-23 02:29:20,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943963761] [2021-11-23 02:29:20,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:29:20,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-11-23 02:29:20,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:20,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-11-23 02:29:20,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=482, Invalid=8830, Unknown=0, NotChecked=0, Total=9312 [2021-11-23 02:29:20,072 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 89 states, 89 states have (on average 1.7640449438202248) internal successors, (157), 89 states have internal predecessors, (157), 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 02:29:48,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:48,778 INFO L93 Difference]: Finished difference Result 376 states and 400 transitions. [2021-11-23 02:29:48,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 279 states. [2021-11-23 02:29:48,779 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.7640449438202248) internal successors, (157), 89 states have internal predecessors, (157), 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 74 [2021-11-23 02:29:48,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:48,781 INFO L225 Difference]: With dead ends: 376 [2021-11-23 02:29:48,781 INFO L226 Difference]: Without dead ends: 374 [2021-11-23 02:29:48,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 368 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48814 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=5963, Invalid=130567, Unknown=0, NotChecked=0, Total=136530 [2021-11-23 02:29:48,786 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 631 mSDsluCounter, 1226 mSDsCounter, 0 mSdLazyCounter, 4652 mSolverCounterSat, 1549 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 6201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1549 IncrementalHoareTripleChecker+Valid, 4652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:48,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 1244 Invalid, 6201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1549 Valid, 4652 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-23 02:29:48,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-11-23 02:29:48,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 130. [2021-11-23 02:29:48,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.1007751937984496) internal successors, (142), 129 states have internal predecessors, (142), 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 02:29:48,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 142 transitions. [2021-11-23 02:29:48,853 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 142 transitions. Word has length 74 [2021-11-23 02:29:48,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:48,853 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 142 transitions. [2021-11-23 02:29:48,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.7640449438202248) internal successors, (157), 89 states have internal predecessors, (157), 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 02:29:48,854 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 142 transitions. [2021-11-23 02:29:48,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 02:29:48,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:48,855 INFO L514 BasicCegarLoop]: trace histogram [16, 14, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:48,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-23 02:29:49,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-23 02:29:49,068 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:49,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:49,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1072498170, now seen corresponding path program 24 times [2021-11-23 02:29:49,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:49,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975209824] [2021-11-23 02:29:49,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:49,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:49,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 92 proven. 149 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-23 02:29:50,214 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:50,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975209824] [2021-11-23 02:29:50,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975209824] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:29:50,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879364347] [2021-11-23 02:29:50,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:29:50,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:50,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:50,216 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:29:50,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_469575de-01fc-4167-8e49-92fc462585ca/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-23 02:29:50,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:29:50,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:29:50,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-23 02:29:50,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:50,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-23 02:29:50,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:50,658 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 0 case distinctions, treesize of input 32 treesize of output 25 [2021-11-23 02:29:50,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:50,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:50,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:50,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 55 treesize of output 48 [2021-11-23 02:29:50,811 INFO L354 Elim1Store]: treesize reduction 207, result has 13.0 percent of original size [2021-11-23 02:29:50,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 71 treesize of output 67 [2021-11-23 02:29:51,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 164 [2021-11-23 02:29:51,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,406 INFO L354 Elim1Store]: treesize reduction 858, result has 11.6 percent of original size [2021-11-23 02:29:51,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 26 case distinctions, treesize of input 183 treesize of output 238 [2021-11-23 02:29:51,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 64 [2021-11-23 02:29:51,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 70 [2021-11-23 02:29:51,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:51,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 105 [2021-11-23 02:29:52,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 192 [2021-11-23 02:29:52,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,502 INFO L354 Elim1Store]: treesize reduction 1374, result has 10.5 percent of original size [2021-11-23 02:29:52,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 43 case distinctions, treesize of input 211 treesize of output 300 [2021-11-23 02:29:52,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 98 [2021-11-23 02:29:52,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 98 [2021-11-23 02:29:52,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:52,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 143 [2021-11-23 02:29:53,779 INFO L354 Elim1Store]: treesize reduction 1143, result has 8.3 percent of original size [2021-11-23 02:29:53,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 54 case distinctions, treesize of input 167 treesize of output 181 [2021-11-23 02:29:53,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 168 [2021-11-23 02:29:53,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 46 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 185 [2021-11-23 02:29:53,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:53,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 162 [2021-11-23 02:29:54,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 248 [2021-11-23 02:29:54,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,733 INFO L354 Elim1Store]: treesize reduction 2622, result has 8.9 percent of original size [2021-11-23 02:29:55,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 89 case distinctions, treesize of input 267 treesize of output 424 [2021-11-23 02:29:55,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:55,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 66 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 304 treesize of output 160 [2021-11-23 02:29:56,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 66 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 304 treesize of output 160 [2021-11-23 02:29:56,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:56,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 66 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 219 [2021-11-23 02:29:57,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 224 [2021-11-23 02:29:57,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,040 INFO L354 Elim1Store]: treesize reduction 2787, result has 5.3 percent of original size [2021-11-23 02:29:58,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 14 select indices, 14 select index equivalence classes, 1 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 226 treesize of output 275 [2021-11-23 02:29:58,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 91 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 257 [2021-11-23 02:29:58,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:58,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 78 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 215 treesize of output 238 [2021-11-23 02:30:00,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 338 treesize of output 304 [2021-11-23 02:30:00,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,791 INFO L354 Elim1Store]: treesize reduction 4158, result has 7.8 percent of original size [2021-11-23 02:30:01,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 16 select indices, 16 select index equivalence classes, 1 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 151 case distinctions, treesize of input 323 treesize of output 548 [2021-11-23 02:30:01,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:01,979 INFO L244 Elim1Store]: Index analysis took 116 ms [2021-11-23 02:30:01,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 120 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 420 treesize of output 222 [2021-11-23 02:30:02,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 120 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 420 treesize of output 222 [2021-11-23 02:30:02,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:02,667 INFO L244 Elim1Store]: Index analysis took 105 ms [2021-11-23 02:30:02,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 120 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 263 treesize of output 295 [2021-11-23 02:31:02,019 INFO L354 Elim1Store]: treesize reduction 2070, result has 0.0 percent of original size [2021-11-23 02:31:02,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 303 treesize of output 159 [2021-11-23 02:31:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 21 proven. 306 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-23 02:31:02,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:33:42,385 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_1108| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_1108| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (<= (select (let ((.cse0 (* |v_ULTIMATE.start_main_~i~0#1_1108| 8)) (.cse1 (* |v_ULTIMATE.start_main_~i~0#1_1108| 2))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 8) (- 8)) (+ (- 2) (* |c_ULTIMATE.start_main_~i~0#1| 2))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse0 (- 8)) (+ (- 2) .cse1)) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse0 (- 4)) (+ (- 1) .cse1))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 48)) 12))) is different from false [2021-11-23 02:37:58,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:37:58,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 25 [2021-11-23 02:37:58,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:37:58,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:37:58,333 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 3 case distinctions, treesize of input 54 treesize of output 45 [2021-11-23 02:37:58,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 114 treesize of output 108 [2021-11-23 02:37:58,395 INFO L354 Elim1Store]: treesize reduction 44, result has 10.2 percent of original size [2021-11-23 02:37:58,396 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 237828 treesize of output 237307 [2021-11-23 02:38:06,156 WARN L227 SmtUtils]: Spent 5.71s on a formula simplification. DAG size of input: 691 DAG size of output: 691 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:38:29,096 WARN L227 SmtUtils]: Spent 5.45s on a formula simplification. DAG size of input: 669 DAG size of output: 666 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:38:35,051 WARN L227 SmtUtils]: Spent 5.39s on a formula simplification. DAG size of input: 667 DAG size of output: 667 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:38:42,027 WARN L227 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 652 DAG size of output: 652 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:38:55,050 WARN L227 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 641 DAG size of output: 641 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:39:51,711 WARN L227 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 628 DAG size of output: 628 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:40:00,029 WARN L227 SmtUtils]: Spent 5.41s on a formula simplification. DAG size of input: 628 DAG size of output: 628 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:40:25,451 WARN L227 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 628 DAG size of output: 628 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)