./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s42if.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_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/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_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s42if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/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_f7f60821-7773-47e8-bdca-76975cd19c24/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 7a409beec5345d23de858b9cfc2d898f0f9067f3e0e10973225e4b6022343f4a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:42:35,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:42:35,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:42:35,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:42:35,944 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:42:35,950 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:42:35,953 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:42:35,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:42:35,961 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:42:35,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:42:35,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:42:35,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:42:35,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:42:35,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:42:35,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:42:35,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:42:35,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:42:35,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:42:35,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:42:35,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:42:36,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:42:36,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:42:36,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:42:36,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:42:36,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:42:36,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:42:36,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:42:36,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:42:36,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:42:36,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:42:36,018 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:42:36,019 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:42:36,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:42:36,021 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:42:36,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:42:36,022 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:42:36,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:42:36,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:42:36,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:42:36,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:42:36,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:42:36,025 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:42:36,049 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:42:36,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:42:36,050 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:42:36,050 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:42:36,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:42:36,051 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:42:36,051 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:42:36,051 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:42:36,051 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:42:36,052 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:42:36,052 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:42:36,052 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:42:36,052 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:42:36,052 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:42:36,052 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:42:36,053 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:42:36,053 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:42:36,053 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:42:36,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:42:36,054 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:42:36,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:42:36,054 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:42:36,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:42:36,055 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:42:36,055 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:42:36,055 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:42:36,055 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:42:36,055 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:42:36,056 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:42:36,056 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:42:36,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:42:36,056 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:42:36,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:42:36,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:42:36,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:42:36,057 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:42:36,057 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:42:36,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:42:36,058 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:42:36,058 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:42:36,058 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:42:36,058 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_f7f60821-7773-47e8-bdca-76975cd19c24/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a409beec5345d23de858b9cfc2d898f0f9067f3e0e10973225e4b6022343f4a [2021-11-21 00:42:36,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:42:36,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:42:36,315 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:42:36,316 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:42:36,317 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:42:36,318 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-fpi/s42if.c [2021-11-21 00:42:36,415 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/data/2804d8483/09e2d20d1507401ab8fe2e8b0b8baf31/FLAGa4c20f93c [2021-11-21 00:42:36,873 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:42:36,874 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/sv-benchmarks/c/array-fpi/s42if.c [2021-11-21 00:42:36,882 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/data/2804d8483/09e2d20d1507401ab8fe2e8b0b8baf31/FLAGa4c20f93c [2021-11-21 00:42:37,254 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/data/2804d8483/09e2d20d1507401ab8fe2e8b0b8baf31 [2021-11-21 00:42:37,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:42:37,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:42:37,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:42:37,274 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:42:37,277 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:42:37,278 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:42:37" (1/1) ... [2021-11-21 00:42:37,279 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@627332d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:37, skipping insertion in model container [2021-11-21 00:42:37,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:42:37" (1/1) ... [2021-11-21 00:42:37,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:42:37,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:42:37,476 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_f7f60821-7773-47e8-bdca-76975cd19c24/sv-benchmarks/c/array-fpi/s42if.c[588,601] [2021-11-21 00:42:37,497 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:42:37,504 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:42:37,517 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_f7f60821-7773-47e8-bdca-76975cd19c24/sv-benchmarks/c/array-fpi/s42if.c[588,601] [2021-11-21 00:42:37,527 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:42:37,541 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:42:37,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:37 WrapperNode [2021-11-21 00:42:37,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:42:37,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:42:37,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:42:37,543 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:42:37,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:37" (1/1) ... [2021-11-21 00:42:37,558 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:37" (1/1) ... [2021-11-21 00:42:37,579 INFO L137 Inliner]: procedures = 17, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 90 [2021-11-21 00:42:37,580 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:42:37,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:42:37,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:42:37,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:42:37,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:37" (1/1) ... [2021-11-21 00:42:37,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:37" (1/1) ... [2021-11-21 00:42:37,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:37" (1/1) ... [2021-11-21 00:42:37,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:37" (1/1) ... [2021-11-21 00:42:37,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:37" (1/1) ... [2021-11-21 00:42:37,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:37" (1/1) ... [2021-11-21 00:42:37,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:37" (1/1) ... [2021-11-21 00:42:37,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:42:37,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:42:37,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:42:37,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:42:37,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:37" (1/1) ... [2021-11-21 00:42:37,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:42:37,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:42:37,652 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:42:37,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:42:37,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:42:37,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:42:37,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:42:37,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:42:37,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:42:37,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:42:37,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:42:37,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:42:37,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:42:37,798 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:42:37,800 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:42:37,940 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:42:37,984 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:42:37,984 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 00:42:37,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:42:37 BoogieIcfgContainer [2021-11-21 00:42:37,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:42:37,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:42:37,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:42:37,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:42:37,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:42:37" (1/3) ... [2021-11-21 00:42:37,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14044917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:42:37, skipping insertion in model container [2021-11-21 00:42:37,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:37" (2/3) ... [2021-11-21 00:42:37,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14044917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:42:37, skipping insertion in model container [2021-11-21 00:42:37,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:42:37" (3/3) ... [2021-11-21 00:42:37,996 INFO L111 eAbstractionObserver]: Analyzing ICFG s42if.c [2021-11-21 00:42:38,001 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:42:38,002 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:42:38,066 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:42:38,073 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:42:38,074 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:42:38,092 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:38,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 00:42:38,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:38,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:42:38,099 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:42:38,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:38,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1162179950, now seen corresponding path program 1 times [2021-11-21 00:42:38,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:42:38,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243017824] [2021-11-21 00:42:38,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:38,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:42:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:38,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:42:38,297 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:42:38,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243017824] [2021-11-21 00:42:38,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243017824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:38,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:38,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:42:38,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257616412] [2021-11-21 00:42:38,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:38,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:42:38,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:42:38,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:42:38,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:42:38,334 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:38,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:38,381 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2021-11-21 00:42:38,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:42:38,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-21 00:42:38,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:38,392 INFO L225 Difference]: With dead ends: 20 [2021-11-21 00:42:38,392 INFO L226 Difference]: Without dead ends: 9 [2021-11-21 00:42:38,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:42:38,399 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:38,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:42:38,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-21 00:42:38,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-21 00:42:38,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 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) [2021-11-21 00:42:38,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2021-11-21 00:42:38,440 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2021-11-21 00:42:38,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:38,441 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-11-21 00:42:38,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:38,441 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2021-11-21 00:42:38,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 00:42:38,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:38,442 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:42:38,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:42:38,443 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:42:38,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:38,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1871859412, now seen corresponding path program 1 times [2021-11-21 00:42:38,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:42:38,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803834427] [2021-11-21 00:42:38,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:38,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:42:38,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:38,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:42:38,507 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:42:38,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803834427] [2021-11-21 00:42:38,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803834427] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:38,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:38,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:42:38,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796713278] [2021-11-21 00:42:38,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:38,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:42:38,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:42:38,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:42:38,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:42:38,511 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:38,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:38,541 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2021-11-21 00:42:38,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:42:38,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 00:42:38,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:38,542 INFO L225 Difference]: With dead ends: 15 [2021-11-21 00:42:38,542 INFO L226 Difference]: Without dead ends: 11 [2021-11-21 00:42:38,542 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 [2021-11-21 00:42:38,544 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:38,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 4 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:42:38,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-21 00:42:38,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-21 00:42:38,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:38,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-21 00:42:38,549 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-11-21 00:42:38,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:38,550 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-21 00:42:38,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:38,550 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-21 00:42:38,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 00:42:38,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:38,551 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:42:38,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:42:38,552 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:42:38,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:38,552 INFO L85 PathProgramCache]: Analyzing trace with hash 908788323, now seen corresponding path program 1 times [2021-11-21 00:42:38,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:42:38,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963666867] [2021-11-21 00:42:38,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:38,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:42:38,573 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:42:38,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112454264] [2021-11-21 00:42:38,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:38,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:42:38,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:42:38,591 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:42:38,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:42:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:38,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-21 00:42:38,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:38,800 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 [2021-11-21 00:42:38,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:38,946 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 [2021-11-21 00:42:39,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:39,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2021-11-21 00:42:39,290 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-11-21 00:42:39,293 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 41 treesize of output 28 [2021-11-21 00:42:39,465 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:42:39,465 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 61 treesize of output 41 [2021-11-21 00:42:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:42:39,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:42:41,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:42:41,494 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:42:41,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963666867] [2021-11-21 00:42:41,495 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:42:41,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112454264] [2021-11-21 00:42:41,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112454264] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:42:41,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [298621411] [2021-11-21 00:42:41,522 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 00:42:41,522 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:42:41,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:42:41,532 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:42:41,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:42:41,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:41,659 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 26 treesize of output 28 [2021-11-21 00:42:41,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:41,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:41,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:41,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:41,761 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 00:42:41,761 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 [2021-11-21 00:42:41,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:41,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:41,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 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 [2021-11-21 00:42:42,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:42,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:42,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:42,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-11-21 00:42:42,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:42,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:42:42,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:42:42,282 INFO L354 Elim1Store]: treesize reduction 112, result has 20.0 percent of original size [2021-11-21 00:42:42,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 295 treesize of output 297 [2021-11-21 00:42:42,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:42:43,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-11-21 00:42:43,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:42:43,171 INFO L354 Elim1Store]: treesize reduction 47, result has 44.0 percent of original size [2021-11-21 00:42:43,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 102 [2021-11-21 00:42:43,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2021-11-21 00:42:43,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-11-21 00:42:43,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:43,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 27 [2021-11-21 00:42:43,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:43,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 26 [2021-11-21 00:42:43,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-11-21 00:42:43,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-11-21 00:42:43,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:42:43,738 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 00:42:43,738 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 [2021-11-21 00:42:43,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:42:43,867 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 00:42:43,867 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 [2021-11-21 00:42:44,490 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 00:42:44,490 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 [2021-11-21 00:42:44,791 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 00:42:44,792 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 [2021-11-21 00:42:45,273 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:42:45,624 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:42:45,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:42:45,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-21 00:42:45,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581237212] [2021-11-21 00:42:45,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:42:45,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 00:42:45,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:42:45,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 00:42:45,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-11-21 00:42:45,627 INFO L87 Difference]: Start difference. First operand 11 states and 13 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) [2021-11-21 00:42:46,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:46,302 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-11-21 00:42:46,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 00:42:46,303 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 [2021-11-21 00:42:46,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:46,303 INFO L225 Difference]: With dead ends: 23 [2021-11-21 00:42:46,303 INFO L226 Difference]: Without dead ends: 17 [2021-11-21 00:42:46,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-11-21 00:42:46,305 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:46,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 85 Invalid, 0 Unknown, 2 Unchecked, 0.4s Time] [2021-11-21 00:42:46,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-21 00:42:46,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2021-11-21 00:42:46,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:46,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2021-11-21 00:42:46,311 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 10 [2021-11-21 00:42:46,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:46,311 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2021-11-21 00:42:46,312 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) [2021-11-21 00:42:46,312 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2021-11-21 00:42:46,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 00:42:46,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:46,313 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:42:46,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:42:46,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:42:46,527 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:42:46,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:46,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1323033207, now seen corresponding path program 2 times [2021-11-21 00:42:46,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:42:46,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686414780] [2021-11-21 00:42:46,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:46,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:42:46,554 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:42:46,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436975566] [2021-11-21 00:42:46,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:42:46,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:42:46,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:42:46,568 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:42:46,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:42:46,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 00:42:46,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:42:46,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:42:46,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:46,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:42:46,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:42:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:42:46,811 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:42:46,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686414780] [2021-11-21 00:42:46,812 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:42:46,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436975566] [2021-11-21 00:42:46,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436975566] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:42:46,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1896883541] [2021-11-21 00:42:46,815 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 00:42:46,815 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:42:46,815 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:42:46,816 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:42:46,816 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:42:46,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:46,944 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 26 treesize of output 28 [2021-11-21 00:42:46,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:46,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:47,030 INFO L354 Elim1Store]: treesize reduction 65, result has 32.3 percent of original size [2021-11-21 00:42:47,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 52 [2021-11-21 00:42:47,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:47,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:47,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:47,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:47,175 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 00:42:47,175 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 [2021-11-21 00:42:47,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:47,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:47,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-11-21 00:42:47,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:47,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:42:47,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:42:47,547 INFO L354 Elim1Store]: treesize reduction 112, result has 20.0 percent of original size [2021-11-21 00:42:47,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 295 treesize of output 297 [2021-11-21 00:42:47,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:42:48,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-11-21 00:42:48,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-11-21 00:42:48,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:48,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:42:48,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 87 [2021-11-21 00:42:48,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:48,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 27 [2021-11-21 00:42:48,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:48,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:42:48,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 43 [2021-11-21 00:42:48,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-11-21 00:42:48,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-11-21 00:42:48,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:42:48,579 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-21 00:42:48,579 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 [2021-11-21 00:42:48,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:42:48,627 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-21 00:42:48,627 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 [2021-11-21 00:42:49,288 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 00:42:49,289 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 [2021-11-21 00:42:49,670 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 00:42:49,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-11-21 00:42:50,233 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:42:50,402 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:42:50,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:42:50,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-21 00:42:50,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160832804] [2021-11-21 00:42:50,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:42:50,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:42:50,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:42:50,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:42:50,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:42:50,404 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:50,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:50,510 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-11-21 00:42:50,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:42:50,510 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) Word has length 11 [2021-11-21 00:42:50,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:50,511 INFO L225 Difference]: With dead ends: 24 [2021-11-21 00:42:50,511 INFO L226 Difference]: Without dead ends: 19 [2021-11-21 00:42:50,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:42:50,512 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:50,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 6 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:42:50,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-21 00:42:50,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2021-11-21 00:42:50,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:50,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-11-21 00:42:50,518 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 11 [2021-11-21 00:42:50,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:50,518 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-11-21 00:42:50,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:50,519 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-11-21 00:42:50,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 00:42:50,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:50,519 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:42:50,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:42:50,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:42:50,731 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:42:50,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:50,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1892164875, now seen corresponding path program 3 times [2021-11-21 00:42:50,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:42:50,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917801454] [2021-11-21 00:42:50,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:50,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:42:50,745 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:42:50,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1382841882] [2021-11-21 00:42:50,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:42:50,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:42:50,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:42:50,747 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:42:50,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:42:50,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:42:50,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:42:50,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:42:50,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:50,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:42:50,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:42:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:42:50,885 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:42:50,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917801454] [2021-11-21 00:42:50,886 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:42:50,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382841882] [2021-11-21 00:42:50,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382841882] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:42:50,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [946565962] [2021-11-21 00:42:50,888 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 00:42:50,888 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:42:50,889 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:42:50,889 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:42:50,889 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:42:50,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:50,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 00:42:51,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:51,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:51,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:51,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:51,084 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 00:42:51,084 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 [2021-11-21 00:42:51,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:51,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:51,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 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 [2021-11-21 00:42:51,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:51,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:51,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-11-21 00:42:51,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:51,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:42:51,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:42:51,526 INFO L354 Elim1Store]: treesize reduction 112, result has 20.0 percent of original size [2021-11-21 00:42:51,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 295 treesize of output 297 [2021-11-21 00:42:51,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:42:52,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-11-21 00:42:52,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-11-21 00:42:52,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:52,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:42:52,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 87 [2021-11-21 00:42:52,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:52,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 27 [2021-11-21 00:42:52,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:52,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 30 [2021-11-21 00:42:52,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:52,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 34 [2021-11-21 00:42:52,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-11-21 00:42:52,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-11-21 00:42:52,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:42:52,531 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 00:42:52,532 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 [2021-11-21 00:42:52,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:42:52,722 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 00:42:52,722 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 [2021-11-21 00:42:53,018 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 00:42:53,019 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 [2021-11-21 00:42:53,372 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 00:42:53,372 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 [2021-11-21 00:42:53,632 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:42:53,786 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:42:53,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:42:53,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-21 00:42:53,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256838229] [2021-11-21 00:42:53,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:42:53,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:42:53,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:42:53,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:42:53,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:42:53,788 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:53,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:53,844 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-11-21 00:42:53,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:42:53,845 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) Word has length 11 [2021-11-21 00:42:53,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:53,845 INFO L225 Difference]: With dead ends: 26 [2021-11-21 00:42:53,845 INFO L226 Difference]: Without dead ends: 14 [2021-11-21 00:42:53,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:42:53,847 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:53,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:42:53,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-21 00:42:53,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-21 00:42:53,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:53,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-21 00:42:53,851 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2021-11-21 00:42:53,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:53,852 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-21 00:42:53,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:53,852 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-21 00:42:53,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 00:42:53,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:53,853 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:42:53,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:42:54,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:42:54,067 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:42:54,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:54,067 INFO L85 PathProgramCache]: Analyzing trace with hash 824956914, now seen corresponding path program 4 times [2021-11-21 00:42:54,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:42:54,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105065320] [2021-11-21 00:42:54,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:54,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:42:54,084 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:42:54,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107623074] [2021-11-21 00:42:54,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:42:54,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:42:54,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:42:54,085 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:42:54,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:42:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:54,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-21 00:42:54,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:54,153 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 [2021-11-21 00:42:54,158 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 [2021-11-21 00:42:54,177 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 [2021-11-21 00:42:54,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:54,208 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 28 treesize of output 30 [2021-11-21 00:42:54,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:54,309 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 41 treesize of output 35 [2021-11-21 00:42:54,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:54,352 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 [2021-11-21 00:42:54,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:42:54,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:54,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 98 [2021-11-21 00:42:54,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:54,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 56 [2021-11-21 00:42:54,570 INFO L354 Elim1Store]: treesize reduction 76, result has 16.5 percent of original size [2021-11-21 00:42:54,570 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 [2021-11-21 00:42:54,653 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 00:42:54,653 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 63 treesize of output 43 [2021-11-21 00:42:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:42:54,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:12,195 WARN L227 SmtUtils]: Spent 46.16s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:44:40,479 WARN L227 SmtUtils]: Spent 15.37s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:45:29,712 WARN L227 SmtUtils]: Spent 30.74s on a formula simplification that was a NOOP. DAG size: 221 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:46:23,192 WARN L227 SmtUtils]: Spent 35.17s on a formula simplification that was a NOOP. DAG size: 226 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:46:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:46:23,401 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:46:23,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105065320] [2021-11-21 00:46:23,401 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:46:23,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107623074] [2021-11-21 00:46:23,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107623074] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:46:23,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [518350054] [2021-11-21 00:46:23,404 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 00:46:23,404 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:46:23,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:46:23,405 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:46:23,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:46:23,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:23,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:23,547 INFO L354 Elim1Store]: treesize reduction 65, result has 32.3 percent of original size [2021-11-21 00:46:23,548 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 52 [2021-11-21 00:46:23,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:23,600 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 26 treesize of output 28 [2021-11-21 00:46:23,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:23,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:23,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:23,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:23,700 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 00:46:23,701 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 [2021-11-21 00:46:23,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:23,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:23,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2021-11-21 00:46:24,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:24,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:24,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:46:24,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:24,096 INFO L354 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2021-11-21 00:46:24,096 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 7 case distinctions, treesize of input 297 treesize of output 293 [2021-11-21 00:46:24,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:46:24,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-11-21 00:46:24,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-11-21 00:46:24,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:24,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:46:24,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 87 [2021-11-21 00:46:24,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:24,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 27 [2021-11-21 00:46:24,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:24,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 44 [2021-11-21 00:46:24,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-11-21 00:46:24,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-11-21 00:46:25,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:46:25,067 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 00:46:25,068 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 [2021-11-21 00:46:25,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:46:25,311 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 00:46:25,311 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 [2021-11-21 00:46:25,462 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 00:46:25,462 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 [2021-11-21 00:46:25,802 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 00:46:25,803 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 [2021-11-21 00:46:26,126 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:46:28,813 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:46:28,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:46:28,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-11-21 00:46:28,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335382466] [2021-11-21 00:46:28,814 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:46:28,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-21 00:46:28,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:46:28,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-21 00:46:28,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=525, Unknown=4, NotChecked=0, Total=600 [2021-11-21 00:46:28,816 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 21 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:46:45,359 WARN L227 SmtUtils]: Spent 5.63s on a formula simplification. DAG size of input: 275 DAG size of output: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:46:51,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:46:51,066 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2021-11-21 00:46:51,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 00:46:51,066 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 00:46:51,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:46:51,067 INFO L225 Difference]: With dead ends: 30 [2021-11-21 00:46:51,067 INFO L226 Difference]: Without dead ends: 23 [2021-11-21 00:46:51,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 195.5s TimeCoverageRelationStatistics Valid=97, Invalid=710, Unknown=5, NotChecked=0, Total=812 [2021-11-21 00:46:51,068 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:46:51,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 163 Invalid, 0 Unknown, 14 Unchecked, 5.3s Time] [2021-11-21 00:46:51,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-21 00:46:51,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2021-11-21 00:46:51,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:46:51,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-21 00:46:51,074 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2021-11-21 00:46:51,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:46:51,075 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-21 00:46:51,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:46:51,075 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-21 00:46:51,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 00:46:51,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:51,076 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:46:51,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-21 00:46:51,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 00:46:51,276 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:46:51,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:51,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1276501236, now seen corresponding path program 5 times [2021-11-21 00:46:51,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:46:51,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040253363] [2021-11-21 00:46:51,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:51,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:46:51,293 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:46:51,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1840492828] [2021-11-21 00:46:51,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:46:51,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:46:51,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:46:51,299 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:46:51,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:46:51,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:46:51,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:46:51,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:46:51,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:46:51,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:46:51,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:46:51,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:46:51,571 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:46:51,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040253363] [2021-11-21 00:46:51,571 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:46:51,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840492828] [2021-11-21 00:46:51,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840492828] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:46:51,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1859384146] [2021-11-21 00:46:51,575 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 00:46:51,575 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:46:51,575 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:46:51,576 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:46:51,576 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:46:51,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:51,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:51,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:51,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:51,744 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 00:46:51,744 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 [2021-11-21 00:46:51,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:51,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:51,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-11-21 00:46:51,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:51,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 00:46:51,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:51,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:51,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:51,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2021-11-21 00:46:52,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:52,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:52,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:46:52,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:52,113 INFO L354 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2021-11-21 00:46:52,113 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 7 case distinctions, treesize of input 293 treesize of output 289 [2021-11-21 00:46:52,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:46:52,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-11-21 00:46:52,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-11-21 00:46:52,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:52,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:46:52,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 87 [2021-11-21 00:46:52,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:52,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 27 [2021-11-21 00:46:52,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:52,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 32 [2021-11-21 00:46:52,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:52,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 36 [2021-11-21 00:46:53,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-11-21 00:46:53,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-11-21 00:46:53,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:46:53,125 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-21 00:46:53,125 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 [2021-11-21 00:46:53,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:46:53,171 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-21 00:46:53,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-11-21 00:46:53,546 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 00:46:53,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-11-21 00:46:53,745 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 00:46:53,746 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 40 treesize of output 58 [2021-11-21 00:46:54,572 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:46:54,743 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:46:54,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:46:54,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-21 00:46:54,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451731924] [2021-11-21 00:46:54,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:46:54,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 00:46:54,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:46:54,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 00:46:54,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-21 00:46:54,745 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:46:54,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:46:54,900 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2021-11-21 00:46:54,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 00:46:54,901 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 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 14 [2021-11-21 00:46:54,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:46:54,902 INFO L225 Difference]: With dead ends: 31 [2021-11-21 00:46:54,902 INFO L226 Difference]: Without dead ends: 25 [2021-11-21 00:46:54,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-11-21 00:46:54,903 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:46:54,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:46:54,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-21 00:46:54,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-11-21 00:46:54,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:46:54,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-11-21 00:46:54,909 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2021-11-21 00:46:54,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:46:54,909 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-11-21 00:46:54,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:46:54,910 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-11-21 00:46:54,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 00:46:54,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:54,911 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:46:54,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:46:55,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:46:55,126 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:46:55,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:55,126 INFO L85 PathProgramCache]: Analyzing trace with hash -195971258, now seen corresponding path program 6 times [2021-11-21 00:46:55,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:46:55,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199632773] [2021-11-21 00:46:55,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:55,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:46:55,158 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:46:55,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630991442] [2021-11-21 00:46:55,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:46:55,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:46:55,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:46:55,171 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:46:55,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:46:55,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:46:55,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:46:55,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:46:55,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:46:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:46:55,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:46:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:46:55,340 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:46:55,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199632773] [2021-11-21 00:46:55,340 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:46:55,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630991442] [2021-11-21 00:46:55,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630991442] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:46:55,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [388180122] [2021-11-21 00:46:55,342 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 00:46:55,342 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:46:55,343 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:46:55,343 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:46:55,343 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:46:55,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:55,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:55,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:55,489 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 00:46:55,490 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 [2021-11-21 00:46:55,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:55,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 00:46:55,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:55,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:55,603 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 [2021-11-21 00:46:55,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:55,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:55,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2021-11-21 00:46:55,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:55,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:55,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:46:55,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:55,913 INFO L354 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2021-11-21 00:46:55,914 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 7 case distinctions, treesize of input 293 treesize of output 289 [2021-11-21 00:46:56,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:46:56,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-11-21 00:46:56,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-11-21 00:46:56,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:56,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:46:56,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 87 [2021-11-21 00:46:56,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:56,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 27 [2021-11-21 00:46:56,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:56,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 44 [2021-11-21 00:46:56,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-11-21 00:46:56,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-11-21 00:46:56,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:46:56,847 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-21 00:46:56,847 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 [2021-11-21 00:46:56,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:46:57,206 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-21 00:46:57,207 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 [2021-11-21 00:46:57,527 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 00:46:57,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-11-21 00:46:57,792 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 00:46:57,792 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 [2021-11-21 00:46:58,622 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:46:58,857 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:46:58,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:46:58,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-21 00:46:58,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472508944] [2021-11-21 00:46:58,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:46:58,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 00:46:58,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:46:58,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 00:46:58,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:46:58,858 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:46:58,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:46:58,959 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-11-21 00:46:58,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:46:58,960 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-21 00:46:58,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:46:58,961 INFO L225 Difference]: With dead ends: 33 [2021-11-21 00:46:58,961 INFO L226 Difference]: Without dead ends: 17 [2021-11-21 00:46:58,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-11-21 00:46:58,962 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:46:58,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:46:58,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-21 00:46:58,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-21 00:46:58,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:46:58,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-21 00:46:58,968 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2021-11-21 00:46:58,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:46:58,968 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-21 00:46:58,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:46:58,968 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-21 00:46:58,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 00:46:58,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:58,969 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:46:59,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:46:59,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:46:59,170 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:46:59,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:59,171 INFO L85 PathProgramCache]: Analyzing trace with hash 852757123, now seen corresponding path program 7 times [2021-11-21 00:46:59,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:46:59,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449689450] [2021-11-21 00:46:59,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:59,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:46:59,200 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:46:59,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487550061] [2021-11-21 00:46:59,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:46:59,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:46:59,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:46:59,208 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:46:59,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f60821-7773-47e8-bdca-76975cd19c24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:46:59,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:59,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-21 00:46:59,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:46:59,273 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 [2021-11-21 00:46:59,279 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 [2021-11-21 00:46:59,300 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 [2021-11-21 00:46:59,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:59,341 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 [2021-11-21 00:46:59,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:59,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:59,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:59,379 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 [2021-11-21 00:46:59,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:59,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:59,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:59,494 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 50 treesize of output 47 [2021-11-21 00:46:59,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:59,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:59,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:59,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:46:59,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:59,596 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 121 treesize of output 109 [2021-11-21 00:46:59,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:59,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:59,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:59,621 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 51 treesize of output 28 [2021-11-21 00:46:59,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:59,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:59,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:59,693 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 [2021-11-21 00:46:59,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:59,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:46:59,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:59,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:59,815 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 125 treesize of output 119 [2021-11-21 00:46:59,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:59,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:59,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:59,847 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 68 treesize of output 37 [2021-11-21 00:46:59,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:59,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:59,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:59,931 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 60 treesize of output 47 [2021-11-21 00:47:00,034 INFO L354 Elim1Store]: treesize reduction 114, result has 16.2 percent of original size [2021-11-21 00:47:00,035 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 60 treesize of output 49 [2021-11-21 00:47:00,126 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-21 00:47:00,127 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 81 treesize of output 49 [2021-11-21 00:47:00,175 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:00,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:48:02,827 WARN L227 SmtUtils]: Spent 24.81s 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) [2021-11-21 00:48:26,287 WARN L227 SmtUtils]: Spent 8.60s on a formula simplification that was a NOOP. DAG size: 96 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:50:59,594 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse52 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse53 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))) (let ((.cse47 (select .cse52 .cse53))) (let ((.cse50 (store .cse52 .cse53 (+ (- 1) .cse47))) (.cse51 (store .cse52 .cse53 (+ .cse47 4)))) (let ((.cse40 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse51)) (.cse43 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse50))) (let ((.cse44 (select .cse43 |c_ULTIMATE.start_main_~#sum~0#1.base|)) (.cse41 (select .cse40 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse6 (select .cse51 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse5 (select .cse41 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse17 (select .cse50 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse16 (select .cse44 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse48 (+ .cse17 .cse16)) (.cse46 (* .cse17 .cse16)) (.cse36 (* .cse6 .cse5)) (.cse45 (+ .cse5 .cse6)) (.cse49 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse3 (select (select (store .cse40 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse41 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse45)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse49)) (.cse29 (select (select (store .cse40 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse41 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse36)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse49)) (.cse14 (select (select (store .cse43 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse44 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse46)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse49)) (.cse21 (select (select (store .cse43 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse44 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse48)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse49)) (.cse42 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8))) (let ((.cse19 (= .cse17 5)) (.cse30 (select (select (store .cse43 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse44 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse21 .cse48))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse42)) (.cse18 (= 5 .cse14)) (.cse39 (select (select (store .cse43 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse44 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse46 .cse14))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse42)) (.cse34 (select (select (store .cse40 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse41 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse29 .cse36))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse42)) (.cse12 (= .cse47 1)) (.cse15 (select (select (store .cse43 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse44 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse14 .cse46))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse42)) (.cse4 (select (select (store .cse40 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse41 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse3 .cse45))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse42)) (.cse25 (= 5 .cse6)) (.cse31 (= .cse21 5)) (.cse20 (select (select (store .cse43 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse44 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse21 .cse17 .cse16))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse42)) (.cse28 (select (select (store .cse40 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse41 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse29 .cse36))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse42)) (.cse35 (= 5 .cse29)) (.cse10 (select (select (store .cse40 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse41 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse5 .cse3 .cse6))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse42)) (.cse8 (= .cse3 5))) (let ((.cse11 (not .cse8)) (.cse9 (= 5 .cse10)) (.cse27 (not .cse35)) (.cse26 (= .cse28 5)) (.cse23 (= .cse20 5)) (.cse24 (not .cse31)) (.cse0 (not .cse25)) (.cse7 (= .cse4 5)) (.cse13 (= .cse15 5)) (.cse1 (not .cse12)) (.cse33 (= 5 .cse34)) (.cse38 (= .cse39 5)) (.cse37 (not .cse18)) (.cse2 (* 5 c_~N~0)) (.cse32 (= .cse30 5)) (.cse22 (not .cse19))) (and (or .cse0 .cse1 (= .cse2 (+ (* .cse3 .cse4 .cse5) (* .cse3 .cse6 .cse4))) .cse7 .cse8) (or .cse0 .cse1 (not .cse9) (= .cse2 (+ .cse5 .cse3 .cse10 .cse6)) .cse11) (or .cse12 .cse13 (= .cse2 (* .cse14 .cse15 .cse16 .cse17)) .cse18 .cse19) (or .cse12 (= .cse2 (+ (* .cse20 .cse16) (* .cse20 .cse17) (* .cse20 .cse21))) .cse22 .cse23 .cse24) (or .cse25 .cse1 .cse26 .cse27 (= .cse2 (+ (* .cse28 .cse6 .cse5) (* .cse29 .cse28)))) (or (= .cse2 (+ (* .cse30 .cse21 .cse16) (* .cse30 .cse21 .cse17))) .cse12 .cse31 .cse32 .cse22) (or .cse33 .cse25 .cse1 (= .cse2 (* .cse29 .cse6 .cse34 .cse5)) .cse35) (or .cse0 .cse1 (= (+ (* .cse10 .cse6) (* .cse10 .cse5) (* .cse10 .cse3)) .cse2) .cse11 .cse9) (or .cse25 .cse1 (= (+ .cse28 .cse29 .cse36) .cse2) .cse27 (not .cse26)) (or .cse12 (= .cse2 (+ .cse20 .cse21 .cse17 .cse16)) (not .cse23) .cse22 .cse24) (or .cse0 .cse1 (= .cse2 (+ .cse4 (* .cse3 .cse6) (* .cse3 .cse5))) (not .cse7) .cse8) (or .cse12 .cse18 .cse19 (= (+ .cse15 (* .cse14 .cse16 .cse17)) .cse2) (not .cse13)) (or .cse25 .cse1 .cse35 (not .cse33) (= .cse2 (+ (* .cse29 .cse6 .cse5) .cse34))) (or .cse12 .cse37 .cse19 (not .cse38) (= .cse2 (+ (* .cse16 .cse17) .cse39 .cse14))) (or .cse12 .cse38 .cse37 (= .cse2 (+ (* .cse16 .cse17 .cse39) (* .cse14 .cse39))) .cse19) (or .cse12 .cse31 (= .cse2 (+ .cse30 (* .cse21 .cse17) (* .cse21 .cse16))) (not .cse32) .cse22)))))))))))) is different from false [2021-11-21 00:53:42,357 WARN L227 SmtUtils]: Spent 14.67s on a formula simplification that was a NOOP. DAG size: 18 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)