./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/nr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/nr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P --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 2a5d4c3d8db636946363c81d25b5c2e381fc236cdcde6b4765d7ce6e059d8a21 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:12:56,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:12:56,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:12:56,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:12:56,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:12:56,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:12:56,063 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:12:56,067 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:12:56,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:12:56,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:12:56,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:12:56,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:12:56,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:12:56,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:12:56,084 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:12:56,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:12:56,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:12:56,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:12:56,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:12:56,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:12:56,101 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:12:56,103 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:12:56,106 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:12:56,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:12:56,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:12:56,120 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:12:56,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:12:56,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:12:56,123 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:12:56,125 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:12:56,126 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:12:56,127 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:12:56,129 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:12:56,131 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:12:56,132 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:12:56,132 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:12:56,133 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:12:56,133 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:12:56,134 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:12:56,135 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:12:56,135 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:12:56,136 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:12:56,183 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:12:56,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:12:56,186 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:12:56,186 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:12:56,193 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:12:56,194 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:12:56,194 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:12:56,194 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:12:56,195 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:12:56,195 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:12:56,196 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:12:56,196 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:12:56,197 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:12:56,197 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:12:56,197 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:12:56,197 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:12:56,197 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:12:56,198 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:12:56,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:12:56,199 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:12:56,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:12:56,199 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:12:56,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:12:56,200 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:12:56,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:12:56,200 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:12:56,200 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:12:56,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:12:56,201 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:12:56,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:12:56,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:12:56,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:12:56,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:12:56,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:12:56,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:12:56,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:12:56,203 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:12:56,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:12:56,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:12:56,203 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:12:56,204 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:12:56,204 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_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a5d4c3d8db636946363c81d25b5c2e381fc236cdcde6b4765d7ce6e059d8a21 [2021-11-21 00:12:56,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:12:56,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:12:56,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:12:56,511 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:12:56,512 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:12:56,513 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-tiling/nr2.c [2021-11-21 00:12:56,602 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/data/3c7ab73fa/1d84decbfd9e4202b39a428402fa9687/FLAGebcc39531 [2021-11-21 00:12:57,134 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:12:57,135 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/sv-benchmarks/c/array-tiling/nr2.c [2021-11-21 00:12:57,147 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/data/3c7ab73fa/1d84decbfd9e4202b39a428402fa9687/FLAGebcc39531 [2021-11-21 00:12:57,512 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/data/3c7ab73fa/1d84decbfd9e4202b39a428402fa9687 [2021-11-21 00:12:57,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:12:57,516 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:12:57,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:12:57,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:12:57,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:12:57,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:12:57" (1/1) ... [2021-11-21 00:12:57,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e5b87fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:12:57, skipping insertion in model container [2021-11-21 00:12:57,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:12:57" (1/1) ... [2021-11-21 00:12:57,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:12:57,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:12:57,707 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_86a0b2dd-7932-476e-9d88-dd81d860a10d/sv-benchmarks/c/array-tiling/nr2.c[394,407] [2021-11-21 00:12:57,730 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:12:57,741 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:12:57,753 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_86a0b2dd-7932-476e-9d88-dd81d860a10d/sv-benchmarks/c/array-tiling/nr2.c[394,407] [2021-11-21 00:12:57,761 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:12:57,774 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:12:57,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:12:57 WrapperNode [2021-11-21 00:12:57,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:12:57,775 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:12:57,775 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:12:57,775 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:12:57,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:12:57" (1/1) ... [2021-11-21 00:12:57,790 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:12:57" (1/1) ... [2021-11-21 00:12:57,811 INFO L137 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 80 [2021-11-21 00:12:57,812 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:12:57,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:12:57,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:12:57,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:12:57,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:12:57" (1/1) ... [2021-11-21 00:12:57,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:12:57" (1/1) ... [2021-11-21 00:12:57,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:12:57" (1/1) ... [2021-11-21 00:12:57,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:12:57" (1/1) ... [2021-11-21 00:12:57,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:12:57" (1/1) ... [2021-11-21 00:12:57,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:12:57" (1/1) ... [2021-11-21 00:12:57,836 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:12:57" (1/1) ... [2021-11-21 00:12:57,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:12:57,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:12:57,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:12:57,840 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:12:57,841 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:12:57" (1/1) ... [2021-11-21 00:12:57,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:12:57,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:12:57,879 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:12:57,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:12:57,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:12:57,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:12:57,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:12:57,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:12:57,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:12:57,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:12:57,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:12:57,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:12:57,989 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:12:57,991 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:12:58,207 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:12:58,305 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:12:58,305 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 00:12:58,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:12:58 BoogieIcfgContainer [2021-11-21 00:12:58,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:12:58,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:12:58,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:12:58,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:12:58,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:12:57" (1/3) ... [2021-11-21 00:12:58,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a2fd93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:12:58, skipping insertion in model container [2021-11-21 00:12:58,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:12:57" (2/3) ... [2021-11-21 00:12:58,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a2fd93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:12:58, skipping insertion in model container [2021-11-21 00:12:58,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:12:58" (3/3) ... [2021-11-21 00:12:58,331 INFO L111 eAbstractionObserver]: Analyzing ICFG nr2.c [2021-11-21 00:12:58,341 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:12:58,342 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:12:58,387 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:12:58,395 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 [2021-11-21 00:12:58,396 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:12:58,410 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) [2021-11-21 00:12:58,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 00:12:58,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:12:58,416 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:12:58,417 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:12:58,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:12:58,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1530238989, now seen corresponding path program 1 times [2021-11-21 00:12:58,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:12:58,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407528043] [2021-11-21 00:12:58,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:58,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:12:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:58,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:12:58,784 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:12:58,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407528043] [2021-11-21 00:12:58,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407528043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:12:58,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:12:58,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:12:58,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088709195] [2021-11-21 00:12:58,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:12:58,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:12:58,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:12:58,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:12:58,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:12:58,822 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 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:12:58,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:12:58,883 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2021-11-21 00:12:58,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:12:58,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-21 00:12:58,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:12:58,893 INFO L225 Difference]: With dead ends: 26 [2021-11-21 00:12:58,894 INFO L226 Difference]: Without dead ends: 12 [2021-11-21 00:12:58,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:12:58,901 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:12:58,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 12 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:12:58,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-21 00:12:58,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-11-21 00:12:58,933 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) [2021-11-21 00:12:58,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-21 00:12:58,935 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2021-11-21 00:12:58,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:12:58,935 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-21 00:12:58,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:12:58,936 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-21 00:12:58,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 00:12:58,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:12:58,937 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:12:58,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:12:58,937 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:12:58,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:12:58,938 INFO L85 PathProgramCache]: Analyzing trace with hash 646031458, now seen corresponding path program 1 times [2021-11-21 00:12:58,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:12:58,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804414017] [2021-11-21 00:12:58,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:58,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:12:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:12:59,000 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:12:59,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804414017] [2021-11-21 00:12:59,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804414017] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:12:59,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:12:59,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:12:59,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137523226] [2021-11-21 00:12:59,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:12:59,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:12:59,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:12:59,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:12:59,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:12:59,005 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2021-11-21 00:12:59,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:12:59,061 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2021-11-21 00:12:59,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:12:59,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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 [2021-11-21 00:12:59,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:12:59,062 INFO L225 Difference]: With dead ends: 19 [2021-11-21 00:12:59,062 INFO L226 Difference]: Without dead ends: 12 [2021-11-21 00:12:59,062 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 [2021-11-21 00:12:59,064 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:12:59,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:12:59,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-21 00:12:59,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-21 00:12:59,069 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) [2021-11-21 00:12:59,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-11-21 00:12:59,072 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2021-11-21 00:12:59,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:12:59,073 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-11-21 00:12:59,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2021-11-21 00:12:59,073 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-11-21 00:12:59,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 00:12:59,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:12:59,074 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:12:59,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:12:59,076 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:12:59,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:12:59,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1553202252, now seen corresponding path program 1 times [2021-11-21 00:12:59,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:12:59,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535347543] [2021-11-21 00:12:59,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:59,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:12:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:59,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:12:59,164 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:12:59,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535347543] [2021-11-21 00:12:59,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535347543] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:12:59,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853410066] [2021-11-21 00:12:59,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:59,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:12:59,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:12:59,169 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:12:59,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:12:59,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:59,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:12:59,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:12:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:12:59,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:12:59,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:12:59,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853410066] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:12:59,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [885959164] [2021-11-21 00:12:59,419 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:12:59,419 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:12:59,425 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:12:59,430 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:12:59,431 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:12:59,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:59,660 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-21 00:12:59,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-21 00:12:59,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:59,751 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:12:59,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 00:13:00,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:00,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:00,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:00,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 188 [2021-11-21 00:13:00,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:00,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:00,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 17 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 46 [2021-11-21 00:13:00,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:00,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:00,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:00,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:00,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:00,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:00,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:00,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:00,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:00,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:00,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:00,970 INFO L354 Elim1Store]: treesize reduction 286, result has 13.1 percent of original size [2021-11-21 00:13:00,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 26 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 362 treesize of output 426 [2021-11-21 00:13:01,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:01,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:13:01,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:01,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:01,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:01,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:01,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:01,483 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-21 00:13:01,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 16 case distinctions, treesize of input 439 treesize of output 351 [2021-11-21 00:13:02,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:02,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:02,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:02,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 18 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 94 [2021-11-21 00:13:03,056 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 19 treesize of output 15 [2021-11-21 00:13:03,073 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 21 treesize of output 17 [2021-11-21 00:13:03,382 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 21 treesize of output 17 [2021-11-21 00:13:03,396 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 19 treesize of output 15 [2021-11-21 00:13:03,606 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 21 treesize of output 17 [2021-11-21 00:13:03,620 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 19 treesize of output 15 [2021-11-21 00:13:04,638 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:13:05,390 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:13:05,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:13:05,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2021-11-21 00:13:05,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742846497] [2021-11-21 00:13:05,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:13:05,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:13:05,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:05,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:13:05,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:13:05,393 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:13:05,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:05,417 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2021-11-21 00:13:05,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:13:05,418 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-21 00:13:05,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:05,419 INFO L225 Difference]: With dead ends: 21 [2021-11-21 00:13:05,419 INFO L226 Difference]: Without dead ends: 13 [2021-11-21 00:13:05,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:13:05,421 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:05,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:13:05,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-21 00:13:05,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-21 00:13:05,425 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) [2021-11-21 00:13:05,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-21 00:13:05,426 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2021-11-21 00:13:05,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:05,427 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-21 00:13:05,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:13:05,427 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-21 00:13:05,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 00:13:05,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:05,428 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:13:05,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:13:05,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:05,652 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:05,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:05,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1009970526, now seen corresponding path program 2 times [2021-11-21 00:13:05,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:05,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402131987] [2021-11-21 00:13:05,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:05,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:05,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:13:05,935 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:05,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402131987] [2021-11-21 00:13:05,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402131987] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:13:05,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432111569] [2021-11-21 00:13:05,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:13:05,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:05,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:05,944 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:13:05,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:13:05,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:13:05,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:13:05,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 00:13:05,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:06,050 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 16 treesize of output 12 [2021-11-21 00:13:06,091 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 60 treesize of output 58 [2021-11-21 00:13:06,109 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-21 00:13:06,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 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 59 treesize of output 69 [2021-11-21 00:13:06,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:06,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2021-11-21 00:13:06,322 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:13:06,323 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 86 treesize of output 66 [2021-11-21 00:13:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:13:06,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:13:06,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:13:06,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 87 [2021-11-21 00:13:06,544 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 15 treesize of output 4 [2021-11-21 00:13:06,574 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 15 treesize of output 4 [2021-11-21 00:13:06,603 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 74 treesize of output 66 [2021-11-21 00:13:06,617 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-21 00:13:06,618 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 94 treesize of output 79 [2021-11-21 00:13:06,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:13:06,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432111569] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:13:06,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [215905687] [2021-11-21 00:13:06,665 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:13:06,665 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:13:06,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:13:06,666 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:13:06,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:13:06,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:06,793 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:13:06,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 00:13:06,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:06,845 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 [2021-11-21 00:13:07,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:07,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:07,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:07,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 188 [2021-11-21 00:13:07,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:07,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:07,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 17 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 54 [2021-11-21 00:13:07,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:07,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:07,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:07,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:07,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:07,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:07,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:07,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:07,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:07,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:07,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:07,677 INFO L354 Elim1Store]: treesize reduction 286, result has 13.1 percent of original size [2021-11-21 00:13:07,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 26 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 362 treesize of output 426 [2021-11-21 00:13:07,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:07,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:07,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:07,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 18 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 78 [2021-11-21 00:13:08,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:13:08,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:08,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:08,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:08,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 18 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 103 [2021-11-21 00:13:09,385 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 21 treesize of output 17 [2021-11-21 00:13:09,400 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 19 treesize of output 15 [2021-11-21 00:13:09,712 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 19 treesize of output 15 [2021-11-21 00:13:09,732 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 21 treesize of output 17 [2021-11-21 00:13:10,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-21 00:13:10,026 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 19 treesize of output 15 [2021-11-21 00:13:11,506 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:13:12,326 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:13:12,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:13:12,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 18 [2021-11-21 00:13:12,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118306537] [2021-11-21 00:13:12,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:13:12,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-21 00:13:12,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:12,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-21 00:13:12,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-11-21 00:13:12,329 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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) [2021-11-21 00:13:12,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:12,430 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-11-21 00:13:12,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 00:13:12,431 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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) Word has length 11 [2021-11-21 00:13:12,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:12,432 INFO L225 Difference]: With dead ends: 25 [2021-11-21 00:13:12,432 INFO L226 Difference]: Without dead ends: 23 [2021-11-21 00:13:12,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-11-21 00:13:12,434 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:12,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 20 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 58 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2021-11-21 00:13:12,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-21 00:13:12,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2021-11-21 00:13:12,439 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) [2021-11-21 00:13:12,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-21 00:13:12,439 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-11-21 00:13:12,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:12,440 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-21 00:13:12,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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) [2021-11-21 00:13:12,440 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-21 00:13:12,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 00:13:12,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:12,441 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:13:12,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:13:12,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:12,642 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:12,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:12,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1780752621, now seen corresponding path program 1 times [2021-11-21 00:13:12,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:12,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401518680] [2021-11-21 00:13:12,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:12,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:12,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:13:12,842 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:12,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401518680] [2021-11-21 00:13:12,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401518680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:13:12,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221694147] [2021-11-21 00:13:12,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:12,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:12,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:12,844 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:13:12,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:13:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:12,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 00:13:12,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:12,972 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 13 treesize of output 9 [2021-11-21 00:13:13,037 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 29 [2021-11-21 00:13:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:13:13,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:13:13,162 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:13:13,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 57 [2021-11-21 00:13:13,177 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 15 treesize of output 4 [2021-11-21 00:13:13,213 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 15 treesize of output 4 [2021-11-21 00:13:13,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:13:13,233 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 49 treesize of output 38 [2021-11-21 00:13:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:13:13,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221694147] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:13:13,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1101917344] [2021-11-21 00:13:13,336 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 00:13:13,336 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:13:13,336 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:13:13,336 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:13:13,337 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:13:13,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:13,430 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:13:13,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 00:13:13,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:13,472 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 [2021-11-21 00:13:13,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:13,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:13,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2021-11-21 00:13:13,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:14,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:14,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:14,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:14,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:14,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:13:14,082 INFO L354 Elim1Store]: treesize reduction 346, result has 18.6 percent of original size [2021-11-21 00:13:14,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 357 treesize of output 430 [2021-11-21 00:13:14,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:13:14,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:13:14,686 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-21 00:13:14,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 16 case distinctions, treesize of input 362 treesize of output 285 [2021-11-21 00:13:15,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:15,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:15,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:15,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 18 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 80 [2021-11-21 00:13:15,644 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 19 treesize of output 15 [2021-11-21 00:13:15,655 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 21 treesize of output 17 [2021-11-21 00:13:15,962 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 21 treesize of output 17 [2021-11-21 00:13:15,972 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 19 treesize of output 15 [2021-11-21 00:13:16,177 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 19 treesize of output 15 [2021-11-21 00:13:16,194 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 21 treesize of output 17 [2021-11-21 00:13:18,284 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:13:19,334 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:13:19,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:13:19,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-11-21 00:13:19,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062832661] [2021-11-21 00:13:19,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:13:19,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-21 00:13:19,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:19,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-21 00:13:19,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-11-21 00:13:19,340 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 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) [2021-11-21 00:13:19,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:19,642 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-11-21 00:13:19,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-21 00:13:19,643 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 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 [2021-11-21 00:13:19,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:19,643 INFO L225 Difference]: With dead ends: 34 [2021-11-21 00:13:19,644 INFO L226 Difference]: Without dead ends: 32 [2021-11-21 00:13:19,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=247, Invalid=1313, Unknown=0, NotChecked=0, Total=1560 [2021-11-21 00:13:19,646 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 60 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:19,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 39 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:13:19,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-21 00:13:19,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2021-11-21 00:13:19,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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) [2021-11-21 00:13:19,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-21 00:13:19,652 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2021-11-21 00:13:19,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:19,653 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-21 00:13:19,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 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) [2021-11-21 00:13:19,653 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-21 00:13:19,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 00:13:19,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:19,654 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:13:19,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:13:19,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:19,872 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:19,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:19,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1039986946, now seen corresponding path program 2 times [2021-11-21 00:13:19,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:19,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192484426] [2021-11-21 00:13:19,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:19,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:19,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:13:20,090 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:20,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192484426] [2021-11-21 00:13:20,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192484426] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:13:20,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484209945] [2021-11-21 00:13:20,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:13:20,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:20,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:20,092 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:13:20,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:13:20,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:13:20,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:13:20,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:13:20,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:20,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:13:20,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:13:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:13:20,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484209945] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:13:20,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2131842821] [2021-11-21 00:13:20,492 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 00:13:20,493 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:13:20,493 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:13:20,493 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:13:20,493 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:13:20,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:20,602 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:13:20,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 00:13:20,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:20,634 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 [2021-11-21 00:13:20,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:20,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:20,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2021-11-21 00:13:21,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:21,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:21,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:21,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:21,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:21,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:13:21,251 INFO L354 Elim1Store]: treesize reduction 346, result has 18.6 percent of original size [2021-11-21 00:13:21,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 357 treesize of output 430 [2021-11-21 00:13:21,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:21,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:21,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:13:21,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 90 [2021-11-21 00:13:22,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:22,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:22,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 17 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 75 [2021-11-21 00:13:22,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:22,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:22,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:22,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 18 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 83 [2021-11-21 00:13:23,288 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 19 treesize of output 15 [2021-11-21 00:13:23,307 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 21 treesize of output 17 [2021-11-21 00:13:23,619 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 21 treesize of output 17 [2021-11-21 00:13:23,631 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 19 treesize of output 15 [2021-11-21 00:13:23,836 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 19 treesize of output 15 [2021-11-21 00:13:23,848 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 21 treesize of output 17 [2021-11-21 00:13:25,437 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:13:26,445 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:13:26,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:13:26,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2021-11-21 00:13:26,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978784376] [2021-11-21 00:13:26,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:13:26,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-21 00:13:26,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:26,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-21 00:13:26,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-11-21 00:13:26,447 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-11-21 00:13:26,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:26,650 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-11-21 00:13:26,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 00:13:26,655 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 17 [2021-11-21 00:13:26,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:26,656 INFO L225 Difference]: With dead ends: 40 [2021-11-21 00:13:26,656 INFO L226 Difference]: Without dead ends: 28 [2021-11-21 00:13:26,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2021-11-21 00:13:26,657 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 39 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:26,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 34 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:13:26,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-21 00:13:26,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-11-21 00:13:26,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 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) [2021-11-21 00:13:26,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-11-21 00:13:26,672 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 17 [2021-11-21 00:13:26,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:26,672 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-11-21 00:13:26,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-11-21 00:13:26,673 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-11-21 00:13:26,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 00:13:26,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:26,674 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:13:26,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:13:26,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 00:13:26,896 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:26,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:26,896 INFO L85 PathProgramCache]: Analyzing trace with hash 2069078404, now seen corresponding path program 3 times [2021-11-21 00:13:26,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:26,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777958182] [2021-11-21 00:13:26,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:26,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:27,194 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:13:27,194 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:27,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777958182] [2021-11-21 00:13:27,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777958182] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:13:27,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276196251] [2021-11-21 00:13:27,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:13:27,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:27,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:27,196 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:13:27,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:13:27,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:13:27,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:13:27,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-21 00:13:27,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:27,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 50 [2021-11-21 00:13:27,330 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 14 treesize of output 3 [2021-11-21 00:13:27,472 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-21 00:13:27,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-21 00:13:27,568 INFO L354 Elim1Store]: treesize reduction 198, result has 19.8 percent of original size [2021-11-21 00:13:27,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 82 treesize of output 110 [2021-11-21 00:13:27,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:27,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:27,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:27,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 34 [2021-11-21 00:13:28,070 INFO L354 Elim1Store]: treesize reduction 103, result has 2.8 percent of original size [2021-11-21 00:13:28,071 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 119 treesize of output 81 [2021-11-21 00:13:28,110 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:13:28,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:14:20,261 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_104| Int)) (or (forall ((|v_ULTIMATE.start_main_~j~0#1_76| Int)) (or (let ((.cse4 (* |v_ULTIMATE.start_main_~i~0#1_104| 8))) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse4 (- 8))) (.cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse4 (* |v_ULTIMATE.start_main_~j~0#1_76| (- 4)))) (.cse3 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4))) (and (= (select (store (store .cse0 .cse1 0) .cse2 0) .cse3) 0) (or (= (select (store (store .cse0 .cse1 2) .cse2 |v_ULTIMATE.start_main_~j~0#1_76|) .cse3) 0) (< |v_ULTIMATE.start_main_~j~0#1_76| |c_ULTIMATE.start_main_~MINVAL~0#1|))))) (< 1 |v_ULTIMATE.start_main_~j~0#1_76|))) (< |v_ULTIMATE.start_main_~i~0#1_104| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-11-21 00:14:20,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:14:20,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:14:20,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 115 treesize of output 115 [2021-11-21 00:14:20,333 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 15 treesize of output 4 [2021-11-21 00:14:20,363 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 15 treesize of output 4 [2021-11-21 00:14:20,463 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 99 treesize of output 91 [2021-11-21 00:14:20,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:14:20,474 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 277 treesize of output 264 [2021-11-21 00:14:22,749 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-21 00:14:22,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276196251] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:14:22,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1804869571] [2021-11-21 00:14:22,751 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 00:14:22,751 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:14:22,751 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:14:22,752 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:14:22,752 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:14:22,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:22,838 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:14:22,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 00:14:22,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:22,896 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 [2021-11-21 00:14:23,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:23,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:23,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:23,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 188 [2021-11-21 00:14:23,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:23,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:23,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 17 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 53 [2021-11-21 00:14:23,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:23,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:23,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:23,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:23,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:23,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:23,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:23,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:23,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:23,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:23,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:23,658 INFO L354 Elim1Store]: treesize reduction 286, result has 13.1 percent of original size [2021-11-21 00:14:23,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 26 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 362 treesize of output 426 [2021-11-21 00:14:23,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:23,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:23,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:14:23,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:23,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:23,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:23,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:23,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:14:23,709 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 00:14:23,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 19 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 16 case distinctions, treesize of input 441 treesize of output 361 [2021-11-21 00:14:24,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:24,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:24,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:24,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 18 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 90 [2021-11-21 00:14:25,252 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 21 treesize of output 17 [2021-11-21 00:14:25,265 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 19 treesize of output 15 [2021-11-21 00:14:25,495 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 19 treesize of output 15 [2021-11-21 00:14:25,505 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 21 treesize of output 17 [2021-11-21 00:14:25,715 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 21 treesize of output 17 [2021-11-21 00:14:25,728 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 19 treesize of output 15 [2021-11-21 00:14:27,462 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:14:28,606 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:14:28,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:14:28,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2021-11-21 00:14:28,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525396019] [2021-11-21 00:14:28,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:14:28,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-21 00:14:28,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:14:28,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-21 00:14:28,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1587, Unknown=43, NotChecked=84, Total=1980 [2021-11-21 00:14:28,609 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 37 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 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) [2021-11-21 00:14:30,632 WARN L838 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_main_~j~0#1| 1) (= |c_ULTIMATE.start_main_~i~0#1| 1) (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (= 0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) 4)) (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_104| Int)) (or (forall ((|v_ULTIMATE.start_main_~j~0#1_76| Int)) (or (let ((.cse4 (* |v_ULTIMATE.start_main_~i~0#1_104| 8))) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse4 (- 8))) (.cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse4 (* |v_ULTIMATE.start_main_~j~0#1_76| (- 4)))) (.cse3 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4))) (and (= (select (store (store .cse0 .cse1 0) .cse2 0) .cse3) 0) (or (= (select (store (store .cse0 .cse1 2) .cse2 |v_ULTIMATE.start_main_~j~0#1_76|) .cse3) 0) (< |v_ULTIMATE.start_main_~j~0#1_76| |c_ULTIMATE.start_main_~MINVAL~0#1|))))) (< 1 |v_ULTIMATE.start_main_~j~0#1_76|))) (< |v_ULTIMATE.start_main_~i~0#1_104| (+ |c_ULTIMATE.start_main_~i~0#1| 1))))) is different from false [2021-11-21 00:14:32,644 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~i~0#1| 1) (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_104| Int)) (or (forall ((|v_ULTIMATE.start_main_~j~0#1_76| Int)) (or (let ((.cse4 (* |v_ULTIMATE.start_main_~i~0#1_104| 8))) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse4 (- 8))) (.cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse4 (* |v_ULTIMATE.start_main_~j~0#1_76| (- 4)))) (.cse3 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4))) (and (= (select (store (store .cse0 .cse1 0) .cse2 0) .cse3) 0) (or (= (select (store (store .cse0 .cse1 2) .cse2 |v_ULTIMATE.start_main_~j~0#1_76|) .cse3) 0) (< |v_ULTIMATE.start_main_~j~0#1_76| |c_ULTIMATE.start_main_~MINVAL~0#1|))))) (< 1 |v_ULTIMATE.start_main_~j~0#1_76|))) (< |v_ULTIMATE.start_main_~i~0#1_104| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (exists ((|v_ULTIMATE.start_main_~j~0#1_72| Int)) (and (<= |v_ULTIMATE.start_main_~j~0#1_72| 1) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 8) (* |v_ULTIMATE.start_main_~j~0#1_72| (- 4)))) 0) (<= 1 |v_ULTIMATE.start_main_~j~0#1_72|)))) is different from false [2021-11-21 00:14:35,936 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 8) (* |c_ULTIMATE.start_main_~j~0#1| (- 4)))) (.cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse3 (< |c_ULTIMATE.start_main_~j~0#1| |c_ULTIMATE.start_main_~MINVAL~0#1|))) (and (= (select (store .cse0 .cse1 0) .cse2) 0) (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (or .cse3 (= (select (store .cse0 .cse1 |c_ULTIMATE.start_main_~j~0#1|) .cse2) 0)) (= 0 (select .cse0 4)) (or (and .cse3 (= (* 8 |c_ULTIMATE.start_main_~i~0#1|) (+ 4 (* 4 |c_ULTIMATE.start_main_~j~0#1|)))) (< |c_ULTIMATE.start_main_~j~0#1| 1)) (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_104| Int)) (or (forall ((|v_ULTIMATE.start_main_~j~0#1_76| Int)) (or (let ((.cse8 (* |v_ULTIMATE.start_main_~i~0#1_104| 8))) (let ((.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse5 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse8 (- 8))) (.cse6 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse8 (* |v_ULTIMATE.start_main_~j~0#1_76| (- 4)))) (.cse7 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4))) (and (= (select (store (store .cse4 .cse5 0) .cse6 0) .cse7) 0) (or (= (select (store (store .cse4 .cse5 2) .cse6 |v_ULTIMATE.start_main_~j~0#1_76|) .cse7) 0) (< |v_ULTIMATE.start_main_~j~0#1_76| |c_ULTIMATE.start_main_~MINVAL~0#1|))))) (< 1 |v_ULTIMATE.start_main_~j~0#1_76|))) (< |v_ULTIMATE.start_main_~i~0#1_104| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))))) is different from false [2021-11-21 00:14:38,812 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 8) (* |c_ULTIMATE.start_main_~j~0#1| (- 4)))) (.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) (.cse3 (< |c_ULTIMATE.start_main_~j~0#1| |c_ULTIMATE.start_main_~MINVAL~0#1|))) (and (= (select .cse0 .cse1) 0) (= (select (store .cse0 .cse2 0) .cse1) 0) (or .cse3 (= (select (store .cse0 .cse2 |c_ULTIMATE.start_main_~j~0#1|) .cse1) 0)) (or (and .cse3 (= (* 8 |c_ULTIMATE.start_main_~i~0#1|) (+ 4 (* 4 |c_ULTIMATE.start_main_~j~0#1|)))) (< |c_ULTIMATE.start_main_~j~0#1| 1)) (forall ((|v_ULTIMATE.start_main_~i~0#1_104| Int)) (or (forall ((|v_ULTIMATE.start_main_~j~0#1_76| Int)) (or (let ((.cse8 (* |v_ULTIMATE.start_main_~i~0#1_104| 8))) (let ((.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse5 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse8 (- 8))) (.cse6 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse8 (* |v_ULTIMATE.start_main_~j~0#1_76| (- 4)))) (.cse7 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4))) (and (= (select (store (store .cse4 .cse5 0) .cse6 0) .cse7) 0) (or (= (select (store (store .cse4 .cse5 2) .cse6 |v_ULTIMATE.start_main_~j~0#1_76|) .cse7) 0) (< |v_ULTIMATE.start_main_~j~0#1_76| |c_ULTIMATE.start_main_~MINVAL~0#1|))))) (< 1 |v_ULTIMATE.start_main_~j~0#1_76|))) (< |v_ULTIMATE.start_main_~i~0#1_104| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))))) is different from false [2021-11-21 00:14:40,815 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_104| Int)) (or (forall ((|v_ULTIMATE.start_main_~j~0#1_76| Int)) (or (let ((.cse4 (* |v_ULTIMATE.start_main_~i~0#1_104| 8))) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse4 (- 8))) (.cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse4 (* |v_ULTIMATE.start_main_~j~0#1_76| (- 4)))) (.cse3 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4))) (and (= (select (store (store .cse0 .cse1 0) .cse2 0) .cse3) 0) (or (= (select (store (store .cse0 .cse1 2) .cse2 |v_ULTIMATE.start_main_~j~0#1_76|) .cse3) 0) (< |v_ULTIMATE.start_main_~j~0#1_76| |c_ULTIMATE.start_main_~MINVAL~0#1|))))) (< 1 |v_ULTIMATE.start_main_~j~0#1_76|))) (< |v_ULTIMATE.start_main_~i~0#1_104| (+ |c_ULTIMATE.start_main_~i~0#1| 1))))) is different from false [2021-11-21 00:15:29,701 WARN L227 SmtUtils]: Spent 16.27s on a formula simplification. DAG size of input: 68 DAG size of output: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:15:33,339 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~j~0#1_72| Int)) (and (<= |v_ULTIMATE.start_main_~j~0#1_72| 1) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 8 (* |v_ULTIMATE.start_main_~j~0#1_72| (- 4)))) 0) (<= 1 |v_ULTIMATE.start_main_~j~0#1_72|))) (forall ((|v_ULTIMATE.start_main_~j~0#1_76| Int)) (or (let ((.cse5 (* |c_ULTIMATE.start_main_~i~0#1| 8))) (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse4 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse5 (* |c_ULTIMATE.start_main_~j~0#1| (- 4)))) (.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse5 (* |v_ULTIMATE.start_main_~j~0#1_76| (- 4)))) (.cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4))) (and (or (< |c_ULTIMATE.start_main_~j~0#1| |c_ULTIMATE.start_main_~MINVAL~0#1|) (let ((.cse0 (store .cse3 .cse4 |c_ULTIMATE.start_main_~j~0#1|))) (and (= (select (store .cse0 .cse1 0) .cse2) 0) (or (= (select (store .cse0 .cse1 |v_ULTIMATE.start_main_~j~0#1_76|) .cse2) 0) (< |v_ULTIMATE.start_main_~j~0#1_76| |c_ULTIMATE.start_main_~MINVAL~0#1|))))) (= (select (store (store .cse3 .cse4 0) .cse1 0) .cse2) 0)))) (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_76| 1)))) (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (exists ((|ULTIMATE.start_main_~i~0#1| Int) (|v_ULTIMATE.start_main_~j~0#1_74| Int)) (let ((.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse7 (* |ULTIMATE.start_main_~i~0#1| 8))) (and (= 2 (select .cse6 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse7 (- 8)))) (<= 2 |ULTIMATE.start_main_~i~0#1|) (= (select .cse6 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse7 (* |v_ULTIMATE.start_main_~j~0#1_74| (- 4)))) 0) (<= |v_ULTIMATE.start_main_~j~0#1_74| 1))))) is different from false [2021-11-21 00:15:57,267 WARN L227 SmtUtils]: Spent 7.43s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:15:59,865 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~j~0#1_76| Int)) (or (let ((.cse5 (* |c_ULTIMATE.start_main_~i~0#1| 8))) (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse4 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse5 (* |c_ULTIMATE.start_main_~j~0#1| (- 4)))) (.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse5 (* |v_ULTIMATE.start_main_~j~0#1_76| (- 4)))) (.cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4))) (and (or (< |c_ULTIMATE.start_main_~j~0#1| |c_ULTIMATE.start_main_~MINVAL~0#1|) (let ((.cse0 (store .cse3 .cse4 |c_ULTIMATE.start_main_~j~0#1|))) (and (= (select (store .cse0 .cse1 0) .cse2) 0) (or (= (select (store .cse0 .cse1 |v_ULTIMATE.start_main_~j~0#1_76|) .cse2) 0) (< |v_ULTIMATE.start_main_~j~0#1_76| |c_ULTIMATE.start_main_~MINVAL~0#1|))))) (= (select (store (store .cse3 .cse4 0) .cse1 0) .cse2) 0)))) (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_76| 1)))) (forall ((|v_ULTIMATE.start_main_~j~0#1_76| Int)) (or (let ((.cse10 (* |c_ULTIMATE.start_main_~i~0#1| 8))) (let ((.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse7 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse10 (- 8))) (.cse8 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse10 (* |v_ULTIMATE.start_main_~j~0#1_76| (- 4)))) (.cse9 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4))) (and (or (= (select (store (store .cse6 .cse7 2) .cse8 |v_ULTIMATE.start_main_~j~0#1_76|) .cse9) 0) (< |v_ULTIMATE.start_main_~j~0#1_76| |c_ULTIMATE.start_main_~MINVAL~0#1|)) (= (select (store (store .cse6 .cse7 0) .cse8 0) .cse9) 0)))) (< 1 |v_ULTIMATE.start_main_~j~0#1_76|)))) is different from false [2021-11-21 00:16:01,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:16:01,905 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2021-11-21 00:16:01,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-21 00:16:01,906 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 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 18 [2021-11-21 00:16:01,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:16:01,908 INFO L225 Difference]: With dead ends: 64 [2021-11-21 00:16:01,908 INFO L226 Difference]: Without dead ends: 62 [2021-11-21 00:16:01,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 148.4s TimeCoverageRelationStatistics Valid=418, Invalid=2266, Unknown=104, NotChecked=872, Total=3660 [2021-11-21 00:16:01,911 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 36 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:16:01,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 57 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 131 Unchecked, 0.1s Time] [2021-11-21 00:16:01,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-21 00:16:01,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 35. [2021-11-21 00:16:01,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 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) [2021-11-21 00:16:01,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-11-21 00:16:01,924 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 18 [2021-11-21 00:16:01,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:16:01,924 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-11-21 00:16:01,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 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) [2021-11-21 00:16:01,925 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-11-21 00:16:01,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-21 00:16:01,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:16:01,926 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:16:01,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:16:02,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:16:02,128 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:16:02,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:16:02,128 INFO L85 PathProgramCache]: Analyzing trace with hash 496746308, now seen corresponding path program 4 times [2021-11-21 00:16:02,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:16:02,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699870045] [2021-11-21 00:16:02,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:16:02,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:16:02,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:16:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 00:16:02,198 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:16:02,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699870045] [2021-11-21 00:16:02,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699870045] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:16:02,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569576185] [2021-11-21 00:16:02,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:16:02,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:16:02,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:16:02,200 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:16:02,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:16:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:16:02,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:16:02,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:16:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 00:16:02,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:16:02,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569576185] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:16:02,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:16:02,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2021-11-21 00:16:02,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901366295] [2021-11-21 00:16:02,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:16:02,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:16:02,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:16:02,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:16:02,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:16:02,284 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-11-21 00:16:02,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:16:02,314 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2021-11-21 00:16:02,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:16:02,314 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 [2021-11-21 00:16:02,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:16:02,315 INFO L225 Difference]: With dead ends: 58 [2021-11-21 00:16:02,315 INFO L226 Difference]: Without dead ends: 30 [2021-11-21 00:16:02,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:16:02,316 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:16:02,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 6 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:16:02,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-21 00:16:02,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-21 00:16:02,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 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) [2021-11-21 00:16:02,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-11-21 00:16:02,325 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 20 [2021-11-21 00:16:02,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:16:02,325 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-11-21 00:16:02,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-11-21 00:16:02,325 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-11-21 00:16:02,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 00:16:02,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:16:02,326 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 00:16:02,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:16:02,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:16:02,526 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:16:02,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:16:02,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1450619663, now seen corresponding path program 5 times [2021-11-21 00:16:02,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:16:02,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96439822] [2021-11-21 00:16:02,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:16:02,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:16:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:16:02,725 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:16:02,726 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:16:02,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96439822] [2021-11-21 00:16:02,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96439822] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:16:02,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168548528] [2021-11-21 00:16:02,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:16:02,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:16:02,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:16:02,728 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:16:02,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:16:02,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-21 00:16:02,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:16:02,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-21 00:16:02,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:16:02,837 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 21 treesize of output 17 [2021-11-21 00:16:02,844 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 19 treesize of output 15 [2021-11-21 00:16:02,918 INFO L354 Elim1Store]: treesize reduction 108, result has 22.3 percent of original size [2021-11-21 00:16:02,918 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 2 case distinctions, treesize of input 105 treesize of output 109 [2021-11-21 00:16:02,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:02,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 19 [2021-11-21 00:16:02,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:02,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 24 [2021-11-21 00:16:03,557 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 79 treesize of output 63 [2021-11-21 00:16:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:16:03,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:16:03,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:16:03,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 98 [2021-11-21 00:16:03,927 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 15 treesize of output 4 [2021-11-21 00:16:03,967 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 15 treesize of output 4 [2021-11-21 00:16:03,990 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 84 treesize of output 76 [2021-11-21 00:16:03,999 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-21 00:16:03,999 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 118 treesize of output 101 [2021-11-21 00:16:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:16:04,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168548528] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:16:04,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [195409928] [2021-11-21 00:16:04,104 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 00:16:04,105 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:16:04,105 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:16:04,105 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:16:04,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:16:04,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:04,222 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:16:04,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 00:16:04,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:04,245 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 [2021-11-21 00:16:04,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:04,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:04,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:04,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 188 [2021-11-21 00:16:04,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:04,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:04,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 17 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 54 [2021-11-21 00:16:04,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:04,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:04,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:04,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:04,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:04,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:04,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:04,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:04,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:04,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:04,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:04,912 INFO L354 Elim1Store]: treesize reduction 286, result has 13.1 percent of original size [2021-11-21 00:16:04,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 26 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 362 treesize of output 426 [2021-11-21 00:16:04,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:04,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:04,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:16:04,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:04,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:04,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:04,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:04,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:16:04,960 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 00:16:04,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 19 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 16 case distinctions, treesize of input 441 treesize of output 345 [2021-11-21 00:16:05,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:05,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:05,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:05,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 18 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 84 [2021-11-21 00:16:06,350 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 21 treesize of output 17 [2021-11-21 00:16:06,360 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 19 treesize of output 15 [2021-11-21 00:16:06,575 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 19 treesize of output 15 [2021-11-21 00:16:06,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-21 00:16:06,828 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 19 treesize of output 15 [2021-11-21 00:16:06,848 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 21 treesize of output 17 [2021-11-21 00:16:08,154 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:16:09,214 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:16:09,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:16:09,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 11] total 26 [2021-11-21 00:16:09,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163491720] [2021-11-21 00:16:09,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:16:09,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-21 00:16:09,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:16:09,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-21 00:16:09,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-11-21 00:16:09,217 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 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) [2021-11-21 00:16:09,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:16:09,831 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-11-21 00:16:09,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 00:16:09,831 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 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 [2021-11-21 00:16:09,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:16:09,832 INFO L225 Difference]: With dead ends: 45 [2021-11-21 00:16:09,832 INFO L226 Difference]: Without dead ends: 0 [2021-11-21 00:16:09,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=298, Invalid=1864, Unknown=0, NotChecked=0, Total=2162 [2021-11-21 00:16:09,833 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:16:09,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 6 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 231 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2021-11-21 00:16:09,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-21 00:16:09,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-21 00:16:09,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-11-21 00:16:09,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-21 00:16:09,835 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2021-11-21 00:16:09,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:16:09,835 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-21 00:16:09,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 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) [2021-11-21 00:16:09,836 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-21 00:16:09,836 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-21 00:16:09,838 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-21 00:16:09,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 00:16:10,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:16:10,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-21 00:16:11,276 INFO L861 garLoopResultBuilder]: At program point L48(lines 13 49) the Hoare annotation is: true [2021-11-21 00:16:11,277 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-21 00:16:11,277 INFO L854 garLoopResultBuilder]: At program point L28-3(lines 28 41) the Hoare annotation is: (let ((.cse0 (<= 2 ~CELLCOUNT~0)) (.cse1 (= 2 |ULTIMATE.start_main_~MINVAL~0#1|)) (.cse2 (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0))) (or (and .cse0 (= |ULTIMATE.start_main_~i~0#1| 1) .cse1 .cse2 (= ~CELLCOUNT~0 (* 2 (div ~CELLCOUNT~0 2)))) (and .cse0 .cse1 .cse2 (let ((.cse3 (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) |ULTIMATE.start_main_~#volArray~0#1.offset|))) (or (<= |ULTIMATE.start_main_~MINVAL~0#1| .cse3) (= .cse3 0))) (<= |ULTIMATE.start_main_~j~0#1| 0)))) [2021-11-21 00:16:11,277 INFO L858 garLoopResultBuilder]: For program point L24(line 24) no Hoare annotation was computed. [2021-11-21 00:16:11,277 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2021-11-21 00:16:11,277 INFO L858 garLoopResultBuilder]: For program point L16(lines 16 47) no Hoare annotation was computed. [2021-11-21 00:16:11,277 INFO L858 garLoopResultBuilder]: For program point L16-2(lines 16 47) no Hoare annotation was computed. [2021-11-21 00:16:11,277 INFO L858 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-11-21 00:16:11,277 INFO L858 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2021-11-21 00:16:11,278 INFO L858 garLoopResultBuilder]: For program point L8-3(line 8) no Hoare annotation was computed. [2021-11-21 00:16:11,278 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-21 00:16:11,278 INFO L854 garLoopResultBuilder]: At program point L30-3(lines 30 40) the Hoare annotation is: (let ((.cse1 (= 2 |ULTIMATE.start_main_~MINVAL~0#1|)) (.cse2 (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0)) (.cse3 (or (<= |ULTIMATE.start_main_~i~0#1| (div ~CELLCOUNT~0 2)) (<= ~CELLCOUNT~0 2))) (.cse4 (let ((.cse6 (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) |ULTIMATE.start_main_~#volArray~0#1.offset|))) (or (<= |ULTIMATE.start_main_~MINVAL~0#1| .cse6) (= .cse6 0)))) (.cse0 (<= 2 ~CELLCOUNT~0))) (or (and (<= |ULTIMATE.start_main_~j~0#1| 1) .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse1 .cse2 .cse3 (let ((.cse5 (= 2 |ULTIMATE.start_main_~j~0#1|))) (or (and .cse5 .cse0 .cse4) (and .cse5 .cse0 (= |ULTIMATE.start_main_~i~0#1| 1))))))) [2021-11-21 00:16:11,278 INFO L854 garLoopResultBuilder]: At program point L43-3(lines 43 46) the Hoare annotation is: (let ((.cse8 (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|))) (let ((.cse11 (div ~CELLCOUNT~0 2)) (.cse12 (select .cse8 (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (let ((.cse10 (= .cse12 0)) (.cse9 (* 2 .cse11))) (let ((.cse5 (< .cse11 2)) (.cse7 (= ~CELLCOUNT~0 .cse9)) (.cse3 (not (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0))) (.cse0 (<= 2 ~CELLCOUNT~0)) (.cse1 (= 2 |ULTIMATE.start_main_~MINVAL~0#1|)) (.cse2 (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0)) (.cse6 (or (<= |ULTIMATE.start_main_~MINVAL~0#1| .cse12) .cse10)) (.cse4 (<= |ULTIMATE.start_main_~j~0#1| 0))) (or (and .cse0 .cse1 (< 0 |ULTIMATE.start___VERIFIER_assert_~cond#1|) .cse2 .cse3 .cse4) (and .cse0 .cse5 (<= |ULTIMATE.start_main_~i~0#1| 2) .cse1 (<= (mod ~CELLCOUNT~0 2) 0) .cse2 .cse3 (<= 2 |ULTIMATE.start_main_~i~0#1|)) (and .cse0 .cse5 (= |ULTIMATE.start_main_~i~0#1| 1) .cse1 .cse2 .cse6 .cse7) (and (= |ULTIMATE.start_main_~i~0#1| 0) .cse0 .cse1 (= 0 (select .cse8 4)) .cse2 .cse6 .cse7 (<= .cse9 2)) (and (or (and .cse0 .cse1 .cse2 .cse3 .cse10) (and .cse0 .cse1 .cse2 .cse6 (or (<= ~CELLCOUNT~0 2) (<= (+ |ULTIMATE.start_main_~i~0#1| 1) .cse11)))) .cse4)))))) [2021-11-21 00:16:11,281 INFO L732 BasicCegarLoop]: Path program histogram: [5, 2, 1, 1] [2021-11-21 00:16:11,283 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 00:16:11,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 12:16:11 BoogieIcfgContainer [2021-11-21 00:16:11,303 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 00:16:11,303 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 00:16:11,303 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 00:16:11,303 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 00:16:11,304 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:12:58" (3/4) ... [2021-11-21 00:16:11,306 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-21 00:16:11,316 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 23 nodes and edges [2021-11-21 00:16:11,316 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-11-21 00:16:11,316 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-21 00:16:11,317 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-21 00:16:11,317 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-21 00:16:11,357 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-21 00:16:11,357 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 00:16:11,358 INFO L158 Benchmark]: Toolchain (without parser) took 193841.64ms. Allocated memory was 109.1MB in the beginning and 192.9MB in the end (delta: 83.9MB). Free memory was 73.8MB in the beginning and 117.5MB in the end (delta: -43.8MB). Peak memory consumption was 41.5MB. Max. memory is 16.1GB. [2021-11-21 00:16:11,358 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 109.1MB. Free memory was 82.3MB in the beginning and 82.2MB in the end (delta: 29.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:16:11,358 INFO L158 Benchmark]: CACSL2BoogieTranslator took 256.51ms. Allocated memory is still 109.1MB. Free memory was 73.4MB in the beginning and 83.9MB in the end (delta: -10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-21 00:16:11,359 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.84ms. Allocated memory is still 109.1MB. Free memory was 83.9MB in the beginning and 82.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:16:11,359 INFO L158 Benchmark]: Boogie Preprocessor took 26.25ms. Allocated memory is still 109.1MB. Free memory was 82.3MB in the beginning and 80.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:16:11,359 INFO L158 Benchmark]: RCFGBuilder took 467.85ms. Allocated memory is still 109.1MB. Free memory was 80.9MB in the beginning and 68.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-21 00:16:11,359 INFO L158 Benchmark]: TraceAbstraction took 192993.36ms. Allocated memory was 109.1MB in the beginning and 192.9MB in the end (delta: 83.9MB). Free memory was 67.8MB in the beginning and 121.7MB in the end (delta: -53.9MB). Peak memory consumption was 101.6MB. Max. memory is 16.1GB. [2021-11-21 00:16:11,360 INFO L158 Benchmark]: Witness Printer took 54.04ms. Allocated memory is still 192.9MB. Free memory was 120.7MB in the beginning and 117.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:16:11,361 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 109.1MB. Free memory was 82.3MB in the beginning and 82.2MB in the end (delta: 29.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 256.51ms. Allocated memory is still 109.1MB. Free memory was 73.4MB in the beginning and 83.9MB in the end (delta: -10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.84ms. Allocated memory is still 109.1MB. Free memory was 83.9MB in the beginning and 82.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 26.25ms. Allocated memory is still 109.1MB. Free memory was 82.3MB in the beginning and 80.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 467.85ms. Allocated memory is still 109.1MB. Free memory was 80.9MB in the beginning and 68.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 192993.36ms. Allocated memory was 109.1MB in the beginning and 192.9MB in the end (delta: 83.9MB). Free memory was 67.8MB in the beginning and 121.7MB in the end (delta: -53.9MB). Peak memory consumption was 101.6MB. Max. memory is 16.1GB. * Witness Printer took 54.04ms. Allocated memory is still 192.9MB. Free memory was 120.7MB in the beginning and 117.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 8]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 192.9s, OverallIterations: 9, TraceHistogramMax: 6, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 94.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 208 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 208 mSDsluCounter, 190 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 190 IncrementalHoareTripleChecker+Unchecked, 184 mSDsCounter, 137 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 674 IncrementalHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 137 mSolverCounterUnsat, 44 mSDtfsCounter, 674 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 402 GetRequests, 180 SyntacticMatches, 9 SemanticMatches, 213 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 2527 ImplicationChecksByTransitivity, 154.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=7, InterpolantAutomatonStates: 117, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 55 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 34 NumberOfFragments, 367 HoareAnnotationTreeSize, 4 FomulaSimplifications, 2321 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 4 FomulaSimplificationsInter, 12544 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 59.8s InterpolantComputationTime, 238 NumberOfCodeBlocks, 237 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 307 ConstructedInterpolants, 18 QuantifiedInterpolants, 3384 SizeOfPredicates, 54 NumberOfNonLiveVariables, 723 ConjunctsInSsa, 102 ConjunctsInUnsatCore, 22 InterpolantComputations, 3 PerfectInterpolantSequences, 106/271 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: ((((2 <= CELLCOUNT && i == 1) && 2 == MINVAL) && volArray == 0) && CELLCOUNT == 2 * (CELLCOUNT / 2)) || ((((2 <= CELLCOUNT && 2 == MINVAL) && volArray == 0) && (MINVAL <= unknown-#memory_int-unknown[volArray][volArray] || unknown-#memory_int-unknown[volArray][volArray] == 0)) && j <= 0) - InvariantResult [Line: 43]: Loop Invariant Derived loop invariant: ((((((((2 <= CELLCOUNT && 2 == MINVAL) && 0 < cond) && volArray == 0) && !(cond == 0)) && j <= 0) || (((((((2 <= CELLCOUNT && CELLCOUNT / 2 < 2) && i <= 2) && 2 == MINVAL) && CELLCOUNT % 2 <= 0) && volArray == 0) && !(cond == 0)) && 2 <= i)) || ((((((2 <= CELLCOUNT && CELLCOUNT / 2 < 2) && i == 1) && 2 == MINVAL) && volArray == 0) && (MINVAL <= unknown-#memory_int-unknown[volArray][volArray + i * 4] || unknown-#memory_int-unknown[volArray][volArray + i * 4] == 0)) && CELLCOUNT == 2 * (CELLCOUNT / 2))) || (((((((i == 0 && 2 <= CELLCOUNT) && 2 == MINVAL) && 0 == unknown-#memory_int-unknown[volArray][4]) && volArray == 0) && (MINVAL <= unknown-#memory_int-unknown[volArray][volArray + i * 4] || unknown-#memory_int-unknown[volArray][volArray + i * 4] == 0)) && CELLCOUNT == 2 * (CELLCOUNT / 2)) && 2 * (CELLCOUNT / 2) <= 2)) || ((((((2 <= CELLCOUNT && 2 == MINVAL) && volArray == 0) && !(cond == 0)) && unknown-#memory_int-unknown[volArray][volArray + i * 4] == 0) || ((((2 <= CELLCOUNT && 2 == MINVAL) && volArray == 0) && (MINVAL <= unknown-#memory_int-unknown[volArray][volArray + i * 4] || unknown-#memory_int-unknown[volArray][volArray + i * 4] == 0)) && (CELLCOUNT <= 2 || i + 1 <= CELLCOUNT / 2))) && j <= 0) - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: (((((j <= 1 && 2 <= CELLCOUNT) && 2 == MINVAL) && volArray == 0) && (i <= CELLCOUNT / 2 || CELLCOUNT <= 2)) && (MINVAL <= unknown-#memory_int-unknown[volArray][volArray] || unknown-#memory_int-unknown[volArray][volArray] == 0)) || (((2 == MINVAL && volArray == 0) && (i <= CELLCOUNT / 2 || CELLCOUNT <= 2)) && (((2 == j && 2 <= CELLCOUNT) && (MINVAL <= unknown-#memory_int-unknown[volArray][volArray] || unknown-#memory_int-unknown[volArray][volArray] == 0)) || ((2 == j && 2 <= CELLCOUNT) && i == 1))) RESULT: Ultimate proved your program to be correct! [2021-11-21 00:16:11,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a0b2dd-7932-476e-9d88-dd81d860a10d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE