./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s1if.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_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/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_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s1if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/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_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/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 1a3387bc5e2da462b89ff029159e07dcc81e24b9a3389e54a743d70d22e0e9eb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:12:34,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:12:34,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:12:34,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:12:34,639 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:12:34,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:12:34,646 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:12:34,650 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:12:34,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:12:34,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:12:34,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:12:34,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:12:34,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:12:34,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:12:34,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:12:34,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:12:34,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:12:34,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:12:34,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:12:34,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:12:34,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:12:34,690 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:12:34,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:12:34,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:12:34,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:12:34,703 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:12:34,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:12:34,706 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:12:34,706 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:12:34,708 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:12:34,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:12:34,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:12:34,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:12:34,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:12:34,714 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:12:34,714 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:12:34,715 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:12:34,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:12:34,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:12:34,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:12:34,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:12:34,718 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:12:34,766 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:12:34,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:12:34,766 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:12:34,766 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:12:34,767 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:12:34,767 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:12:34,767 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:12:34,768 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:12:34,768 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:12:34,768 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:12:34,768 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:12:34,768 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:12:34,768 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:12:34,769 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:12:34,769 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:12:34,769 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:12:34,769 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:12:34,771 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:12:34,772 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:12:34,772 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:12:34,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:12:34,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:12:34,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:12:34,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:12:34,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:12:34,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:12:34,775 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:12:34,775 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:12:34,776 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:12:34,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:12:34,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:12:34,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:12:34,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:12:34,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:12:34,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:12:34,778 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:12:34,779 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:12:34,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:12:34,779 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:12:34,779 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:12:34,779 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:12:34,779 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_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a3387bc5e2da462b89ff029159e07dcc81e24b9a3389e54a743d70d22e0e9eb [2021-11-20 23:12:35,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:12:35,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:12:35,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:12:35,083 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:12:35,083 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:12:35,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-fpi/s1if.c [2021-11-20 23:12:35,156 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/data/10b6e4859/f676761b92d2465a8eb379fe476c0b98/FLAGb50bd3d75 [2021-11-20 23:12:35,677 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:12:35,677 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/sv-benchmarks/c/array-fpi/s1if.c [2021-11-20 23:12:35,689 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/data/10b6e4859/f676761b92d2465a8eb379fe476c0b98/FLAGb50bd3d75 [2021-11-20 23:12:36,027 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/data/10b6e4859/f676761b92d2465a8eb379fe476c0b98 [2021-11-20 23:12:36,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:12:36,031 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:12:36,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:12:36,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:12:36,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:12:36,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:12:36" (1/1) ... [2021-11-20 23:12:36,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6adf0517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:36, skipping insertion in model container [2021-11-20 23:12:36,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:12:36" (1/1) ... [2021-11-20 23:12:36,057 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:12:36,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:12:36,244 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_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/sv-benchmarks/c/array-fpi/s1if.c[587,600] [2021-11-20 23:12:36,263 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:12:36,271 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:12:36,284 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_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/sv-benchmarks/c/array-fpi/s1if.c[587,600] [2021-11-20 23:12:36,291 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:12:36,305 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:12:36,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:36 WrapperNode [2021-11-20 23:12:36,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:12:36,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:12:36,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:12:36,307 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:12:36,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:36" (1/1) ... [2021-11-20 23:12:36,321 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:36" (1/1) ... [2021-11-20 23:12:36,342 INFO L137 Inliner]: procedures = 17, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2021-11-20 23:12:36,342 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:12:36,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:12:36,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:12:36,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:12:36,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:36" (1/1) ... [2021-11-20 23:12:36,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:36" (1/1) ... [2021-11-20 23:12:36,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:36" (1/1) ... [2021-11-20 23:12:36,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:36" (1/1) ... [2021-11-20 23:12:36,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:36" (1/1) ... [2021-11-20 23:12:36,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:36" (1/1) ... [2021-11-20 23:12:36,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:36" (1/1) ... [2021-11-20 23:12:36,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:12:36,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:12:36,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:12:36,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:12:36,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:36" (1/1) ... [2021-11-20 23:12:36,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:12:36,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:12:36,396 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:12:36,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:12:36,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:12:36,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:12:36,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:12:36,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:12:36,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:12:36,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:12:36,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:12:36,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:12:36,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:12:36,528 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:12:36,530 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:12:36,767 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:12:36,872 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:12:36,872 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 23:12:36,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:12:36 BoogieIcfgContainer [2021-11-20 23:12:36,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:12:36,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:12:36,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:12:36,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:12:36,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:12:36" (1/3) ... [2021-11-20 23:12:36,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7764120a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:12:36, skipping insertion in model container [2021-11-20 23:12:36,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:36" (2/3) ... [2021-11-20 23:12:36,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7764120a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:12:36, skipping insertion in model container [2021-11-20 23:12:36,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:12:36" (3/3) ... [2021-11-20 23:12:36,899 INFO L111 eAbstractionObserver]: Analyzing ICFG s1if.c [2021-11-20 23:12:36,904 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:12:36,904 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:12:36,992 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:12:37,000 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 [2021-11-20 23:12:37,001 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:12:37,028 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 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) [2021-11-20 23:12:37,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 23:12:37,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:37,036 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 23:12:37,036 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:37,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:37,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1569409207, now seen corresponding path program 1 times [2021-11-20 23:12:37,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:37,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007663497] [2021-11-20 23:12:37,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:37,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:37,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:37,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:12:37,271 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:37,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007663497] [2021-11-20 23:12:37,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007663497] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:12:37,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:12:37,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:12:37,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880145413] [2021-11-20 23:12:37,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:12:37,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:12:37,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:37,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:12:37,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:12:37,320 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 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) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-20 23:12:37,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:37,375 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-11-20 23:12:37,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:12:37,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-11-20 23:12:37,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:37,390 INFO L225 Difference]: With dead ends: 18 [2021-11-20 23:12:37,391 INFO L226 Difference]: Without dead ends: 8 [2021-11-20 23:12:37,393 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 [2021-11-20 23:12:37,397 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:37,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:12:37,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-20 23:12:37,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-20 23:12:37,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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) [2021-11-20 23:12:37,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-11-20 23:12:37,422 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-11-20 23:12:37,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:37,423 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-11-20 23:12:37,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-20 23:12:37,423 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-11-20 23:12:37,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 23:12:37,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:37,424 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:12:37,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:12:37,425 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:37,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:37,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1413550180, now seen corresponding path program 1 times [2021-11-20 23:12:37,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:37,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079690312] [2021-11-20 23:12:37,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:37,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:37,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:12:37,489 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:37,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079690312] [2021-11-20 23:12:37,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079690312] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:12:37,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:12:37,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:12:37,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475294742] [2021-11-20 23:12:37,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:12:37,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:12:37,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:37,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:12:37,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:12:37,493 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. 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) [2021-11-20 23:12:37,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:37,545 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-11-20 23:12:37,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:12:37,546 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 [2021-11-20 23:12:37,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:37,547 INFO L225 Difference]: With dead ends: 12 [2021-11-20 23:12:37,547 INFO L226 Difference]: Without dead ends: 9 [2021-11-20 23:12:37,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:12:37,550 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:37,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 4 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:12:37,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-20 23:12:37,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-20 23:12:37,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:12:37,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-20 23:12:37,565 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2021-11-20 23:12:37,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:37,566 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-20 23:12:37,567 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) [2021-11-20 23:12:37,568 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-20 23:12:37,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 23:12:37,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:37,569 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:12:37,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:12:37,570 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:37,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:37,582 INFO L85 PathProgramCache]: Analyzing trace with hash -870274037, now seen corresponding path program 1 times [2021-11-20 23:12:37,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:37,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160685999] [2021-11-20 23:12:37,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:37,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:37,600 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:12:37,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794383538] [2021-11-20 23:12:37,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:37,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:12:37,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:12:37,603 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:12:37,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:12:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:37,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 23:12:37,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:12:37,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 23:12:37,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:12:37,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-20 23:12:37,977 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-11-20 23:12:37,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 27 [2021-11-20 23:12:38,068 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:12:38,069 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 56 treesize of output 36 [2021-11-20 23:12:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:12:38,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:12:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:12:38,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:38,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160685999] [2021-11-20 23:12:38,566 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:12:38,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794383538] [2021-11-20 23:12:38,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794383538] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:12:38,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1036025762] [2021-11-20 23:12:38,594 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:12:38,594 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:12:38,599 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:12:38,605 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:12:38,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:12:38,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:38,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:38,831 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-20 23:12:38,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-20 23:12:38,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:38,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:38,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:38,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:39,012 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-20 23:12:39,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-20 23:12:39,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:39,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-20 23:12:39,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:39,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:39,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:39,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 27 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2021-11-20 23:12:39,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:39,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:39,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:39,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:39,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:39,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:39,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:12:39,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:39,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:39,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:39,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:39,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:39,742 INFO L354 Elim1Store]: treesize reduction 220, result has 11.6 percent of original size [2021-11-20 23:12:39,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 32 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 387 treesize of output 376 [2021-11-20 23:12:40,348 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 [2021-11-20 23:12:40,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:12:40,505 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:12:40,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-20 23:12:40,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:12:40,557 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:12:40,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-20 23:12:40,848 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:12:40,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-20 23:12:41,051 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:12:41,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-20 23:12:41,370 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:12:41,650 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:12:41,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:12:41,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-20 23:12:41,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853256341] [2021-11-20 23:12:41,651 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:12:41,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 23:12:41,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:41,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 23:12:41,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:12:41,653 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 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) [2021-11-20 23:12:41,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:41,723 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-11-20 23:12:41,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:12:41,725 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 23:12:41,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:41,725 INFO L225 Difference]: With dead ends: 15 [2021-11-20 23:12:41,725 INFO L226 Difference]: Without dead ends: 12 [2021-11-20 23:12:41,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:12:41,727 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:41,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2021-11-20 23:12:41,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-20 23:12:41,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-11-20 23:12:41,731 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) [2021-11-20 23:12:41,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-20 23:12:41,732 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-11-20 23:12:41,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:41,732 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-20 23:12:41,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 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) [2021-11-20 23:12:41,732 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-20 23:12:41,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 23:12:41,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:41,733 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:12:41,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:12:41,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:12:41,946 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:41,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:41,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1208582788, now seen corresponding path program 2 times [2021-11-20 23:12:41,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:41,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609129433] [2021-11-20 23:12:41,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:41,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:41,963 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:12:41,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606375893] [2021-11-20 23:12:41,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:12:41,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:12:41,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:12:41,964 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:12:41,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:12:42,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 23:12:42,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:12:42,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:12:42,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:12:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:12:42,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:12:42,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:12:42,128 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:42,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609129433] [2021-11-20 23:12:42,129 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:12:42,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606375893] [2021-11-20 23:12:42,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606375893] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:12:42,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1369551293] [2021-11-20 23:12:42,145 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:12:42,146 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:12:42,146 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:12:42,147 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:12:42,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:12:42,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:42,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:42,306 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-20 23:12:42,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-20 23:12:42,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:42,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:42,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:42,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:42,438 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-20 23:12:42,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-20 23:12:42,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:42,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-20 23:12:42,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:42,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:42,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:42,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-20 23:12:42,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:42,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:42,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:42,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:42,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:42,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:12:42,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:12:43,046 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-20 23:12:43,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 385 treesize of output 380 [2021-11-20 23:12:43,777 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 [2021-11-20 23:12:43,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:12:43,956 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:12:43,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-20 23:12:44,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:12:44,129 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:12:44,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-20 23:12:44,265 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:12:44,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-20 23:12:44,334 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:12:44,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-20 23:12:44,788 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:12:45,005 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:12:45,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:12:45,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-20 23:12:45,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842337784] [2021-11-20 23:12:45,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:12:45,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:12:45,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:45,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:12:45,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-20 23:12:45,008 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 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) [2021-11-20 23:12:45,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:45,074 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-11-20 23:12:45,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:12:45,075 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 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 9 [2021-11-20 23:12:45,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:45,075 INFO L225 Difference]: With dead ends: 20 [2021-11-20 23:12:45,075 INFO L226 Difference]: Without dead ends: 14 [2021-11-20 23:12:45,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:12:45,080 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:45,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 10 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:12:45,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-20 23:12:45,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2021-11-20 23:12:45,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:12:45,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-20 23:12:45,085 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 9 [2021-11-20 23:12:45,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:45,085 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-20 23:12:45,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 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) [2021-11-20 23:12:45,085 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-20 23:12:45,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 23:12:45,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:45,085 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:12:45,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-20 23:12:45,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-20 23:12:45,286 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:45,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:45,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1413604450, now seen corresponding path program 3 times [2021-11-20 23:12:45,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:45,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541192106] [2021-11-20 23:12:45,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:45,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:45,299 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:12:45,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282148494] [2021-11-20 23:12:45,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:12:45,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:12:45,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:12:45,300 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:12:45,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:12:45,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:12:45,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:12:45,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:12:45,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:12:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:12:45,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:12:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:12:45,460 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:45,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541192106] [2021-11-20 23:12:45,460 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:12:45,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282148494] [2021-11-20 23:12:45,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282148494] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:12:45,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [527535757] [2021-11-20 23:12:45,467 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:12:45,467 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:12:45,467 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:12:45,467 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:12:45,468 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:12:45,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:45,601 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 23:12:45,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-20 23:12:45,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:45,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:45,742 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-20 23:12:45,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-20 23:12:45,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:45,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:45,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:45,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:45,899 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-20 23:12:45,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-20 23:12:45,986 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 [2021-11-20 23:12:46,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:46,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 39 [2021-11-20 23:12:46,166 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 [2021-11-20 23:12:46,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:12:46,269 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:12:46,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-20 23:12:46,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:12:46,308 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:12:46,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-20 23:12:46,607 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:12:46,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-20 23:12:46,746 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:12:46,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-20 23:12:47,018 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:12:47,217 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:12:47,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:12:47,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-20 23:12:47,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185300431] [2021-11-20 23:12:47,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:12:47,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 23:12:47,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:47,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 23:12:47,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-20 23:12:47,219 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:12:47,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:47,299 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-11-20 23:12:47,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:12:47,300 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-20 23:12:47,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:47,300 INFO L225 Difference]: With dead ends: 14 [2021-11-20 23:12:47,300 INFO L226 Difference]: Without dead ends: 11 [2021-11-20 23:12:47,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-20 23:12:47,301 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:47,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 10 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:12:47,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-20 23:12:47,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-20 23:12:47,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 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) [2021-11-20 23:12:47,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-20 23:12:47,304 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2021-11-20 23:12:47,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:47,305 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-20 23:12:47,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:12:47,305 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-20 23:12:47,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 23:12:47,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:47,306 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-20 23:12:47,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-20 23:12:47,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:12:47,506 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:47,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:47,507 INFO L85 PathProgramCache]: Analyzing trace with hash -871956407, now seen corresponding path program 4 times [2021-11-20 23:12:47,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:47,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399748802] [2021-11-20 23:12:47,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:47,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:47,519 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:12:47,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465713393] [2021-11-20 23:12:47,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 23:12:47,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:12:47,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:12:47,529 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:12:47,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:12:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:47,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 23:12:47,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:12:47,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 23:12:47,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:12:47,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-11-20 23:12:47,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:47,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-20 23:12:47,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:47,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-11-20 23:12:47,853 INFO L354 Elim1Store]: treesize reduction 76, result has 16.5 percent of original size [2021-11-20 23:12:47,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 37 [2021-11-20 23:12:47,938 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:12:47,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 41 [2021-11-20 23:12:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:12:47,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:12:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:12:52,047 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:52,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399748802] [2021-11-20 23:12:52,047 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:12:52,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465713393] [2021-11-20 23:12:52,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465713393] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:12:52,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1900113581] [2021-11-20 23:12:52,050 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:12:52,050 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:12:52,050 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:12:52,051 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:12:52,051 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:12:52,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:52,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:52,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:52,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:52,204 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-20 23:12:52,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-20 23:12:52,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:52,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:52,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-20 23:12:52,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:52,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-20 23:12:52,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:52,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:52,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:52,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 27 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-20 23:12:52,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:52,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:52,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:52,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:52,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:52,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:12:52,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:12:52,716 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-20 23:12:52,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 381 treesize of output 376 [2021-11-20 23:12:53,301 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 [2021-11-20 23:12:53,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:12:53,435 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:12:53,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-20 23:12:53,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:12:53,628 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:12:53,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-20 23:12:53,732 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:12:53,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-20 23:12:53,793 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:12:53,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-20 23:12:54,215 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:12:54,518 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:12:54,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:12:54,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-20 23:12:54,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356694698] [2021-11-20 23:12:54,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:12:54,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 23:12:54,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:54,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 23:12:54,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-11-20 23:12:54,520 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 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) [2021-11-20 23:12:56,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:56,197 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-11-20 23:12:56,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 23:12:56,197 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 23:12:56,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:56,198 INFO L225 Difference]: With dead ends: 18 [2021-11-20 23:12:56,198 INFO L226 Difference]: Without dead ends: 15 [2021-11-20 23:12:56,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-11-20 23:12:56,199 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:56,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 76 Invalid, 0 Unknown, 9 Unchecked, 0.3s Time] [2021-11-20 23:12:56,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-20 23:12:56,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2021-11-20 23:12:56,204 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) [2021-11-20 23:12:56,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-20 23:12:56,204 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2021-11-20 23:12:56,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:56,205 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-20 23:12:56,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 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) [2021-11-20 23:12:56,205 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-20 23:12:56,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 23:12:56,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:56,206 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2021-11-20 23:12:56,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:12:56,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:12:56,410 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:56,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:56,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1260736258, now seen corresponding path program 5 times [2021-11-20 23:12:56,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:56,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493485812] [2021-11-20 23:12:56,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:56,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:56,426 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:12:56,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420228259] [2021-11-20 23:12:56,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:12:56,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:12:56,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:12:56,427 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:12:56,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 23:12:56,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 23:12:56,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:12:56,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 23:12:56,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:12:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:12:56,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:12:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:12:56,594 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:56,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493485812] [2021-11-20 23:12:56,595 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:12:56,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420228259] [2021-11-20 23:12:56,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420228259] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:12:56,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1410318389] [2021-11-20 23:12:56,600 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:12:56,600 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:12:56,600 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:12:56,600 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:12:56,601 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:12:56,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:56,705 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 23:12:56,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-20 23:12:56,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:56,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:56,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:56,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:56,849 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-20 23:12:56,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-20 23:12:56,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:56,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:56,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-20 23:12:57,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:57,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:57,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:57,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 27 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2021-11-20 23:12:57,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:57,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:57,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:57,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:57,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:57,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:57,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:12:57,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:57,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:57,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:57,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:57,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:57,368 INFO L354 Elim1Store]: treesize reduction 220, result has 11.6 percent of original size [2021-11-20 23:12:57,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 32 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 383 treesize of output 372 [2021-11-20 23:12:57,888 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 [2021-11-20 23:12:58,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:12:58,025 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-20 23:12:58,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 38 [2021-11-20 23:12:58,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:12:58,180 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-20 23:12:58,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 37 [2021-11-20 23:12:58,299 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:12:58,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-20 23:12:58,594 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:12:58,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-20 23:12:58,875 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:12:59,074 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:12:59,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:12:59,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-20 23:12:59,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879401662] [2021-11-20 23:12:59,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:12:59,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 23:12:59,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:59,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 23:12:59,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:12:59,076 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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) [2021-11-20 23:12:59,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:59,160 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-11-20 23:12:59,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 23:12:59,161 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 23:12:59,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:59,161 INFO L225 Difference]: With dead ends: 23 [2021-11-20 23:12:59,161 INFO L226 Difference]: Without dead ends: 16 [2021-11-20 23:12:59,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-11-20 23:12:59,162 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:59,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 10 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:12:59,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-20 23:12:59,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2021-11-20 23:12:59,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 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) [2021-11-20 23:12:59,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-20 23:12:59,167 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 11 [2021-11-20 23:12:59,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:59,167 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-20 23:12:59,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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) [2021-11-20 23:12:59,168 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-20 23:12:59,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 23:12:59,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:59,168 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2021-11-20 23:12:59,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 23:12:59,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:12:59,377 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:59,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:59,377 INFO L85 PathProgramCache]: Analyzing trace with hash 973526812, now seen corresponding path program 6 times [2021-11-20 23:12:59,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:59,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300846882] [2021-11-20 23:12:59,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:59,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:59,391 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:12:59,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078062705] [2021-11-20 23:12:59,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:12:59,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:12:59,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:12:59,392 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:12:59,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 23:12:59,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:12:59,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:12:59,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 23:12:59,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:12:59,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:12:59,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:12:59,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:12:59,578 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:59,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300846882] [2021-11-20 23:12:59,579 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:12:59,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078062705] [2021-11-20 23:12:59,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078062705] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:12:59,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [56347973] [2021-11-20 23:12:59,582 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:12:59,582 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:12:59,582 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:12:59,583 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:12:59,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:12:59,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:59,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:59,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:59,733 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-20 23:12:59,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-20 23:12:59,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:59,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-20 23:12:59,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:59,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:59,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-20 23:12:59,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:59,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:59,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:12:59,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 27 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-20 23:13:00,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:13:00,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:13:00,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:13:00,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:13:00,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:13:00,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:13:00,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:13:00,223 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-20 23:13:00,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 381 treesize of output 376 [2021-11-20 23:13:00,703 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 [2021-11-20 23:13:00,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:13:00,837 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-20 23:13:00,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 38 [2021-11-20 23:13:01,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:13:01,034 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-20 23:13:01,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 37 [2021-11-20 23:13:01,164 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:13:01,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-20 23:13:01,388 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:13:01,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-20 23:13:01,622 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:13:01,800 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:13:01,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:13:01,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-20 23:13:01,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035039302] [2021-11-20 23:13:01,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:13:01,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 23:13:01,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:01,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 23:13:01,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-20 23:13:01,802 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 12 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) [2021-11-20 23:13:01,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:01,891 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2021-11-20 23:13:01,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 23:13:01,892 INFO L78 Accepts]: Start accepts. Automaton has has 12 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) Word has length 11 [2021-11-20 23:13:01,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:01,892 INFO L225 Difference]: With dead ends: 16 [2021-11-20 23:13:01,892 INFO L226 Difference]: Without dead ends: 13 [2021-11-20 23:13:01,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-11-20 23:13:01,893 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:01,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 8 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:13:01,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-20 23:13:01,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-20 23:13:01,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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) [2021-11-20 23:13:01,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-20 23:13:01,897 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-11-20 23:13:01,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:01,897 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-20 23:13:01,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 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) [2021-11-20 23:13:01,898 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-20 23:13:01,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 23:13:01,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:01,898 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:01,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 23:13:02,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:13:02,099 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:02,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:02,099 INFO L85 PathProgramCache]: Analyzing trace with hash 114668683, now seen corresponding path program 7 times [2021-11-20 23:13:02,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:02,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033846051] [2021-11-20 23:13:02,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:02,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:02,111 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:13:02,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128461874] [2021-11-20 23:13:02,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 23:13:02,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:13:02,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:13:02,126 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:13:02,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 23:13:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:02,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-20 23:13:02,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:13:02,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 23:13:02,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:13:02,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-11-20 23:13:02,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:13:02,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-11-20 23:13:02,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:13:02,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:13:02,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:13:02,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-20 23:13:02,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:13:02,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:13:02,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:13:02,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2021-11-20 23:13:02,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:13:02,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:13:02,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:13:02,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:13:02,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:13:02,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 115 [2021-11-20 23:13:02,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:13:02,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:13:02,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:13:02,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 76 [2021-11-20 23:13:02,605 INFO L354 Elim1Store]: treesize reduction 114, result has 16.2 percent of original size [2021-11-20 23:13:02,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 70 treesize of output 51 [2021-11-20 23:13:02,700 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-20 23:13:02,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 44 [2021-11-20 23:13:02,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:02,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:13:26,891 WARN L227 SmtUtils]: Spent 10.57s on a formula simplification that was a NOOP. DAG size: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:13:38,299 WARN L227 SmtUtils]: Spent 5.47s on a formula simplification that was a NOOP. DAG size: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:14:09,229 WARN L227 SmtUtils]: Spent 10.14s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:14:45,789 WARN L227 SmtUtils]: Spent 19.83s on a formula simplification that was a NOOP. DAG size: 119 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:15:46,831 WARN L227 SmtUtils]: Spent 33.66s on a formula simplification that was a NOOP. DAG size: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:15:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:15:46,934 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:15:46,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033846051] [2021-11-20 23:15:46,935 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:15:46,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128461874] [2021-11-20 23:15:46,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128461874] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:15:46,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [572024885] [2021-11-20 23:15:46,937 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:15:46,937 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:15:46,938 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:15:46,938 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:15:46,938 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:15:47,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:47,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:47,086 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-20 23:15:47,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-20 23:15:47,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:47,173 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 23:15:47,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 22 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-20 23:15:47,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:47,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:47,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:47,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:47,333 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-20 23:15:47,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-20 23:15:47,418 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 [2021-11-20 23:15:47,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:47,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 39 [2021-11-20 23:15:47,548 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 [2021-11-20 23:15:47,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:47,680 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:15:47,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-20 23:15:47,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:47,746 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:15:47,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-20 23:15:48,056 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:15:48,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-20 23:15:48,214 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:15:48,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-20 23:15:48,434 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:15:50,604 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:15:50,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:15:50,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-20 23:15:50,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138527900] [2021-11-20 23:15:50,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:15:50,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 23:15:50,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:15:50,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 23:15:50,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=440, Unknown=4, NotChecked=0, Total=506 [2021-11-20 23:15:50,606 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:26,388 WARN L227 SmtUtils]: Spent 22.49s on a formula simplification that was a NOOP. DAG size: 139 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:16:26,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:26,392 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-11-20 23:16:26,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 23:16:26,392 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-20 23:16:26,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:26,393 INFO L225 Difference]: With dead ends: 21 [2021-11-20 23:16:26,393 INFO L226 Difference]: Without dead ends: 18 [2021-11-20 23:16:26,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 158.2s TimeCoverageRelationStatistics Valid=73, Invalid=522, Unknown=5, NotChecked=0, Total=600 [2021-11-20 23:16:26,394 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:26,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 111 Invalid, 0 Unknown, 2 Unchecked, 1.6s Time] [2021-11-20 23:16:26,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-20 23:16:26,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2021-11-20 23:16:26,400 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) [2021-11-20 23:16:26,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-20 23:16:26,401 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2021-11-20 23:16:26,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:26,401 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-20 23:16:26,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:26,401 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-20 23:16:26,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 23:16:26,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:26,402 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:26,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-20 23:16:26,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 23:16:26,603 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:26,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:26,604 INFO L85 PathProgramCache]: Analyzing trace with hash -740129540, now seen corresponding path program 8 times [2021-11-20 23:16:26,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:26,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386201796] [2021-11-20 23:16:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:26,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:26,615 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:16:26,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [630653557] [2021-11-20 23:16:26,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:16:26,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:26,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:26,641 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:26,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 23:16:26,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 23:16:26,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:16:26,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 23:16:26,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:26,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:26,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:26,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:26,870 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:26,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386201796] [2021-11-20 23:16:26,871 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:16:26,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630653557] [2021-11-20 23:16:26,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630653557] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:16:26,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [279867790] [2021-11-20 23:16:26,873 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:16:26,873 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:16:26,873 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:16:26,873 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:16:26,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:16:26,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:26,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:26,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:27,047 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-20 23:16:27,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-20 23:16:27,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:27,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-20 23:16:27,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:27,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:27,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-20 23:16:27,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:27,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:27,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:27,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 27 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-20 23:16:27,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:27,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:27,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:27,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:27,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:27,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:16:27,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:16:27,550 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-20 23:16:27,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 381 treesize of output 376 [2021-11-20 23:16:28,020 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 [2021-11-20 23:16:28,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:16:28,157 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:16:28,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-20 23:16:28,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:16:28,194 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:16:28,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-20 23:16:28,491 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:16:28,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-20 23:16:28,772 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:16:28,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-20 23:16:29,047 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:16:29,245 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:16:29,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:16:29,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-11-20 23:16:29,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320373606] [2021-11-20 23:16:29,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:16:29,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 23:16:29,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:29,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 23:16:29,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-11-20 23:16:29,247 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 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) [2021-11-20 23:16:29,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:29,356 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-11-20 23:16:29,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 23:16:29,357 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-20 23:16:29,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:29,358 INFO L225 Difference]: With dead ends: 26 [2021-11-20 23:16:29,358 INFO L226 Difference]: Without dead ends: 18 [2021-11-20 23:16:29,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-11-20 23:16:29,359 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:29,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 14 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:16:29,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-20 23:16:29,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2021-11-20 23:16:29,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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) [2021-11-20 23:16:29,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-11-20 23:16:29,364 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 13 [2021-11-20 23:16:29,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:29,364 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-11-20 23:16:29,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 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) [2021-11-20 23:16:29,365 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-11-20 23:16:29,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 23:16:29,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:29,365 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:29,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-20 23:16:29,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 23:16:29,570 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:29,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:29,570 INFO L85 PathProgramCache]: Analyzing trace with hash -197451106, now seen corresponding path program 9 times [2021-11-20 23:16:29,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:29,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710892281] [2021-11-20 23:16:29,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:29,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:29,585 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:16:29,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934672001] [2021-11-20 23:16:29,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:16:29,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:29,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:29,587 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:29,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 23:16:29,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:16:29,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:16:29,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 23:16:29,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:29,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:29,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:29,808 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:29,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710892281] [2021-11-20 23:16:29,808 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:16:29,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934672001] [2021-11-20 23:16:29,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934672001] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:16:29,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1734567042] [2021-11-20 23:16:29,811 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:16:29,811 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:16:29,811 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:16:29,811 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:16:29,811 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:16:29,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:29,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:29,954 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-20 23:16:29,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-20 23:16:30,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:30,056 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 23:16:30,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 22 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-20 23:16:30,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:30,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:30,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:30,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:30,235 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-20 23:16:30,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-20 23:16:30,337 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 [2021-11-20 23:16:30,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:30,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 39 [2021-11-20 23:16:30,474 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 [2021-11-20 23:16:30,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:16:30,616 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:16:30,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-20 23:16:30,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:16:30,824 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:16:30,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-20 23:16:30,919 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:16:30,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-20 23:16:31,237 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:16:31,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-20 23:16:31,491 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:16:31,686 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:16:31,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:16:31,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-20 23:16:31,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136554969] [2021-11-20 23:16:31,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:16:31,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 23:16:31,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:31,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 23:16:31,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-20 23:16:31,688 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 15 states, 15 states have (on average 1.2) internal successors, (18), 15 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) [2021-11-20 23:16:31,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:31,832 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-11-20 23:16:31,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 23:16:31,833 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-20 23:16:31,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:31,834 INFO L225 Difference]: With dead ends: 18 [2021-11-20 23:16:31,834 INFO L226 Difference]: Without dead ends: 15 [2021-11-20 23:16:31,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2021-11-20 23:16:31,835 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:31,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 8 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:16:31,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-20 23:16:31,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-20 23:16:31,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 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) [2021-11-20 23:16:31,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-20 23:16:31,840 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2021-11-20 23:16:31,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:31,841 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-20 23:16:31,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 15 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) [2021-11-20 23:16:31,841 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-20 23:16:31,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 23:16:31,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:31,841 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:31,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:32,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:32,042 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:32,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:32,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1825908407, now seen corresponding path program 10 times [2021-11-20 23:16:32,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:32,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898304024] [2021-11-20 23:16:32,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:32,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:32,055 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:16:32,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506938776] [2021-11-20 23:16:32,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 23:16:32,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:32,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:32,082 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:32,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d14e796-22ad-4ed0-a4b0-f7edd2ce6199/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 23:16:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:32,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-20 23:16:32,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:32,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:16:32,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 23:16:32,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-20 23:16:32,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-20 23:16:32,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 48 [2021-11-20 23:16:32,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 54 [2021-11-20 23:16:32,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:16:32,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 140 [2021-11-20 23:16:32,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 50 [2021-11-20 23:16:32,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:16:32,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 146 [2021-11-20 23:16:32,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 57 [2021-11-20 23:16:32,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:16:32,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 156 [2021-11-20 23:16:32,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:32,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 56 [2021-11-20 23:16:32,865 INFO L354 Elim1Store]: treesize reduction 152, result has 16.0 percent of original size [2021-11-20 23:16:32,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 78 treesize of output 62 [2021-11-20 23:16:32,933 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-20 23:16:32,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 100 treesize of output 52 [2021-11-20 23:16:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:32,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:41,338 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse22 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse11 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|)) (.cse4 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse22)))) (let ((.cse0 (= .cse4 1)) (.cse12 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse22)) (.cse13 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse22 4)) (.cse6 (select .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (and (or .cse0 (let ((.cse10 (* .cse4 .cse6))) (let ((.cse5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse10)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13))) (let ((.cse1 (= .cse5 1)) (.cse9 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse10 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse12)) (.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse5 .cse10))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse12))) (let ((.cse2 (= .cse3 1)) (.cse8 (= .cse9 1)) (.cse7 (not .cse1))) (and (or .cse1 .cse2 (= c_~N~0 (* .cse3 .cse4 .cse5 .cse6))) (or .cse7 .cse8 (= (+ (* .cse4 .cse9 .cse6) (* .cse5 .cse9)) c_~N~0)) (or .cse1 (not .cse2) (= (+ .cse3 (* .cse4 .cse5 .cse6)) c_~N~0)) (or (= (+ .cse10 .cse9 .cse5) c_~N~0) (not .cse8) .cse7))))))) (or (not .cse0) (let ((.cse21 (+ .cse4 .cse6))) (let ((.cse14 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse21)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13))) (let ((.cse15 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse14 .cse21))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse12)) (.cse17 (= .cse14 1)) (.cse18 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse4 .cse6 .cse14))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse12))) (let ((.cse20 (= .cse18 1)) (.cse19 (not .cse17)) (.cse16 (= .cse15 1))) (and (or (= c_~N~0 (+ (* .cse14 .cse6 .cse15) (* .cse4 .cse14 .cse15))) .cse16 .cse17) (or (= (+ (* .cse4 .cse18) (* .cse18 .cse6) (* .cse18 .cse14)) c_~N~0) .cse19 .cse20) (or (not .cse20) .cse19 (= c_~N~0 (+ .cse4 .cse18 .cse6 .cse14))) (or (= (+ (* .cse4 .cse14) .cse15 (* .cse14 .cse6)) c_~N~0) (not .cse16) .cse17))))))))))) is different from true [2021-11-20 23:19:57,591 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse39 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|)) (.cse45 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse12 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse45))) (.cse15 (select .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse4 (* .cse12 .cse15)) (.cse47 (+ .cse12 .cse15)) (.cse48 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse45 4))) (let ((.cse16 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse47)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse48)) (.cse6 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse4)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse48))) (let ((.cse44 (+ .cse4 .cse6)) (.cse40 (* .cse6 .cse4)) (.cse42 (* .cse16 .cse47)) (.cse43 (+ .cse12 .cse15 .cse16)) (.cse46 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse45))) (let ((.cse13 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse43)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse46)) (.cse28 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse42)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse46)) (.cse20 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse40)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse46)) (.cse5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse44)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse46)) (.cse41 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 .cse45))) (let ((.cse36 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse5 .cse44))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse41)) (.cse17 (= .cse6 1)) (.cse23 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse40 .cse20))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse41)) (.cse18 (= .cse20 1)) (.cse0 (= .cse12 1)) (.cse33 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse28 .cse42))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse41)) (.cse14 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse13 .cse43))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse41)) (.cse27 (= .cse16 1)) (.cse30 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse12 .cse13 .cse15 .cse16))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse41)) (.cse11 (= .cse13 1)) (.cse29 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse42 .cse28))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse41)) (.cse34 (= .cse28 1)) (.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse4 .cse5 .cse6))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse41)) (.cse38 (= .cse5 1)) (.cse21 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse20 .cse40))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse41))) (let ((.cse19 (= .cse21 1)) (.cse1 (not .cse38)) (.cse7 (= .cse3 1)) (.cse25 (not .cse34)) (.cse26 (= .cse29 1)) (.cse31 (not .cse11)) (.cse32 (= .cse30 1)) (.cse10 (not .cse27)) (.cse9 (= 1 .cse14)) (.cse35 (= .cse33 1)) (.cse8 (not .cse0)) (.cse24 (not .cse18)) (.cse22 (= 1 .cse23)) (.cse2 (not .cse17)) (.cse37 (= .cse36 1))) (and (or .cse0 .cse1 .cse2 (= c_~N~0 (+ .cse3 .cse4 .cse5 .cse6)) (not .cse7)) (or .cse8 .cse9 .cse10 .cse11 (= (+ (* .cse12 .cse13 .cse14) (* .cse13 .cse14 .cse15) (* .cse13 .cse14 .cse16)) c_~N~0)) (or .cse17 .cse0 .cse18 .cse19 (= c_~N~0 (* .cse12 .cse20 .cse6 .cse21 .cse15))) (or .cse17 .cse0 .cse22 (= (+ (* .cse20 .cse23) (* .cse12 .cse6 .cse15 .cse23)) c_~N~0) .cse24) (or .cse17 .cse0 .cse18 (= c_~N~0 (+ .cse21 (* .cse12 .cse20 .cse6 .cse15))) (not .cse19)) (or .cse25 .cse8 (not .cse26) .cse27 (= (+ (* .cse12 .cse16) .cse28 (* .cse16 .cse15) .cse29) c_~N~0)) (or .cse0 .cse1 .cse2 (= (+ (* .cse3 .cse6) (* .cse3 .cse5) (* .cse12 .cse3 .cse15)) c_~N~0) .cse7) (or .cse25 .cse8 .cse26 .cse27 (= (+ (* .cse12 .cse29 .cse16) (* .cse29 .cse28) (* .cse29 .cse16 .cse15)) c_~N~0)) (or (= (+ (* .cse30 .cse16) (* .cse12 .cse30) (* .cse30 .cse15) (* .cse13 .cse30)) c_~N~0) .cse31 .cse8 .cse10 .cse32) (or .cse31 .cse8 .cse10 (= (+ .cse12 .cse30 .cse13 .cse15 .cse16) c_~N~0) (not .cse32)) (or .cse8 (= c_~N~0 (+ (* .cse16 .cse15 .cse28 .cse33) (* .cse12 .cse16 .cse28 .cse33))) .cse34 .cse27 .cse35) (or .cse8 .cse10 (not .cse9) .cse11 (= (+ (* .cse12 .cse13) (* .cse13 .cse15) (* .cse13 .cse16) .cse14) c_~N~0)) (or (not .cse35) .cse8 (= (+ (* .cse16 .cse15 .cse28) .cse33 (* .cse12 .cse16 .cse28)) c_~N~0) .cse34 .cse27) (or .cse0 .cse2 (= (+ (* .cse12 .cse5 .cse15 .cse36) (* .cse6 .cse5 .cse36)) c_~N~0) .cse37 .cse38) (or .cse17 .cse0 .cse24 (= (+ .cse20 (* .cse12 .cse6 .cse15) .cse23) c_~N~0) (not .cse22)) (or .cse0 .cse2 (not .cse37) .cse38 (= (+ .cse36 (* .cse12 .cse5 .cse15) (* .cse6 .cse5)) c_~N~0))))))))))) is different from false [2021-11-20 23:19:59,603 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse39 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|)) (.cse45 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse12 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse45))) (.cse15 (select .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse4 (* .cse12 .cse15)) (.cse47 (+ .cse12 .cse15)) (.cse48 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse45 4))) (let ((.cse16 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse47)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse48)) (.cse6 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse4)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse48))) (let ((.cse44 (+ .cse4 .cse6)) (.cse40 (* .cse6 .cse4)) (.cse42 (* .cse16 .cse47)) (.cse43 (+ .cse12 .cse15 .cse16)) (.cse46 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse45))) (let ((.cse13 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse43)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse46)) (.cse28 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse42)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse46)) (.cse20 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse40)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse46)) (.cse5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse44)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse46)) (.cse41 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 .cse45))) (let ((.cse36 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse5 .cse44))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse41)) (.cse17 (= .cse6 1)) (.cse23 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse40 .cse20))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse41)) (.cse18 (= .cse20 1)) (.cse0 (= .cse12 1)) (.cse33 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse28 .cse42))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse41)) (.cse14 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse13 .cse43))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse41)) (.cse27 (= .cse16 1)) (.cse30 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse12 .cse13 .cse15 .cse16))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse41)) (.cse11 (= .cse13 1)) (.cse29 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse42 .cse28))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse41)) (.cse34 (= .cse28 1)) (.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse4 .cse5 .cse6))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse41)) (.cse38 (= .cse5 1)) (.cse21 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse20 .cse40))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse41))) (let ((.cse19 (= .cse21 1)) (.cse1 (not .cse38)) (.cse7 (= .cse3 1)) (.cse25 (not .cse34)) (.cse26 (= .cse29 1)) (.cse31 (not .cse11)) (.cse32 (= .cse30 1)) (.cse10 (not .cse27)) (.cse9 (= 1 .cse14)) (.cse35 (= .cse33 1)) (.cse8 (not .cse0)) (.cse24 (not .cse18)) (.cse22 (= 1 .cse23)) (.cse2 (not .cse17)) (.cse37 (= .cse36 1))) (and (or .cse0 .cse1 .cse2 (= c_~N~0 (+ .cse3 .cse4 .cse5 .cse6)) (not .cse7)) (or .cse8 .cse9 .cse10 .cse11 (= (+ (* .cse12 .cse13 .cse14) (* .cse13 .cse14 .cse15) (* .cse13 .cse14 .cse16)) c_~N~0)) (or .cse17 .cse0 .cse18 .cse19 (= c_~N~0 (* .cse12 .cse20 .cse6 .cse21 .cse15))) (or .cse17 .cse0 .cse22 (= (+ (* .cse20 .cse23) (* .cse12 .cse6 .cse15 .cse23)) c_~N~0) .cse24) (or .cse17 .cse0 .cse18 (= c_~N~0 (+ .cse21 (* .cse12 .cse20 .cse6 .cse15))) (not .cse19)) (or .cse25 .cse8 (not .cse26) .cse27 (= (+ (* .cse12 .cse16) .cse28 (* .cse16 .cse15) .cse29) c_~N~0)) (or .cse0 .cse1 .cse2 (= (+ (* .cse3 .cse6) (* .cse3 .cse5) (* .cse12 .cse3 .cse15)) c_~N~0) .cse7) (or .cse25 .cse8 .cse26 .cse27 (= (+ (* .cse12 .cse29 .cse16) (* .cse29 .cse28) (* .cse29 .cse16 .cse15)) c_~N~0)) (or (= (+ (* .cse30 .cse16) (* .cse12 .cse30) (* .cse30 .cse15) (* .cse13 .cse30)) c_~N~0) .cse31 .cse8 .cse10 .cse32) (or .cse31 .cse8 .cse10 (= (+ .cse12 .cse30 .cse13 .cse15 .cse16) c_~N~0) (not .cse32)) (or .cse8 (= c_~N~0 (+ (* .cse16 .cse15 .cse28 .cse33) (* .cse12 .cse16 .cse28 .cse33))) .cse34 .cse27 .cse35) (or .cse8 .cse10 (not .cse9) .cse11 (= (+ (* .cse12 .cse13) (* .cse13 .cse15) (* .cse13 .cse16) .cse14) c_~N~0)) (or (not .cse35) .cse8 (= (+ (* .cse16 .cse15 .cse28) .cse33 (* .cse12 .cse16 .cse28)) c_~N~0) .cse34 .cse27) (or .cse0 .cse2 (= (+ (* .cse12 .cse5 .cse15 .cse36) (* .cse6 .cse5 .cse36)) c_~N~0) .cse37 .cse38) (or .cse17 .cse0 .cse24 (= (+ .cse20 (* .cse12 .cse6 .cse15) .cse23) c_~N~0) (not .cse22)) (or .cse0 .cse2 (not .cse37) .cse38 (= (+ .cse36 (* .cse12 .cse5 .cse15) (* .cse6 .cse5)) c_~N~0))))))))))) is different from true [2021-11-20 23:24:13,274 WARN L227 SmtUtils]: Spent 3.13m on a formula simplification that was a NOOP. DAG size: 200 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:25:55,543 WARN L227 SmtUtils]: Spent 5.12s on a formula simplification that was a NOOP. DAG size: 38 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)