./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_tiling_poly6.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_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/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_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_tiling_poly6.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/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_b60d3d14-2769-455f-8a23-fbbe54ab24d8/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 26ad3956041b2e839611ff318d272e1f932670752c1f7180f45920516dc03b70 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:33:35,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:33:35,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:33:35,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:33:35,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:33:35,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:33:35,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:33:35,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:33:35,180 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:33:35,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:33:35,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:33:35,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:33:35,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:33:35,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:33:35,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:33:35,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:33:35,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:33:35,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:33:35,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:33:35,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:33:35,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:33:35,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:33:35,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:33:35,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:33:35,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:33:35,237 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:33:35,237 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:33:35,239 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:33:35,240 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:33:35,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:33:35,243 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:33:35,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:33:35,246 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:33:35,247 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:33:35,249 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:33:35,249 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:33:35,250 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:33:35,250 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:33:35,250 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:33:35,251 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:33:35,252 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:33:35,253 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:33:35,301 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:33:35,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:33:35,302 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:33:35,302 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:33:35,309 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:33:35,309 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:33:35,310 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:33:35,310 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:33:35,310 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:33:35,310 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:33:35,312 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:33:35,312 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:33:35,312 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:33:35,312 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:33:35,313 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:33:35,313 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:33:35,313 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:33:35,313 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:33:35,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:33:35,314 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:33:35,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:33:35,315 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:33:35,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:33:35,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:33:35,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:33:35,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:33:35,317 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:33:35,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:33:35,318 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:33:35,318 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:33:35,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:33:35,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:33:35,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:33:35,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:33:35,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:33:35,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:33:35,320 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:33:35,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:33:35,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:33:35,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:33:35,321 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:33:35,321 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_b60d3d14-2769-455f-8a23-fbbe54ab24d8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26ad3956041b2e839611ff318d272e1f932670752c1f7180f45920516dc03b70 [2021-11-21 01:33:35,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:33:35,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:33:35,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:33:35,606 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:33:35,607 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:33:35,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-cav19/array_tiling_poly6.c [2021-11-21 01:33:35,707 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/data/fd932ab61/26fd2b3187414b5aa86f2e33476c27b9/FLAG61072695e [2021-11-21 01:33:36,140 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:33:36,141 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/sv-benchmarks/c/array-cav19/array_tiling_poly6.c [2021-11-21 01:33:36,151 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/data/fd932ab61/26fd2b3187414b5aa86f2e33476c27b9/FLAG61072695e [2021-11-21 01:33:36,526 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/data/fd932ab61/26fd2b3187414b5aa86f2e33476c27b9 [2021-11-21 01:33:36,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:33:36,533 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:33:36,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:33:36,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:33:36,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:33:36,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:33:36" (1/1) ... [2021-11-21 01:33:36,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f9676b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:36, skipping insertion in model container [2021-11-21 01:33:36,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:33:36" (1/1) ... [2021-11-21 01:33:36,556 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:33:36,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:33:36,792 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_b60d3d14-2769-455f-8a23-fbbe54ab24d8/sv-benchmarks/c/array-cav19/array_tiling_poly6.c[409,422] [2021-11-21 01:33:36,815 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:33:36,824 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:33:36,839 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_b60d3d14-2769-455f-8a23-fbbe54ab24d8/sv-benchmarks/c/array-cav19/array_tiling_poly6.c[409,422] [2021-11-21 01:33:36,857 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:33:36,875 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:33:36,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:36 WrapperNode [2021-11-21 01:33:36,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:33:36,877 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:33:36,878 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:33:36,878 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:33:36,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:36" (1/1) ... [2021-11-21 01:33:36,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:36" (1/1) ... [2021-11-21 01:33:36,919 INFO L137 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 61 [2021-11-21 01:33:36,920 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:33:36,921 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:33:36,921 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:33:36,922 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:33:36,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:36" (1/1) ... [2021-11-21 01:33:36,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:36" (1/1) ... [2021-11-21 01:33:36,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:36" (1/1) ... [2021-11-21 01:33:36,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:36" (1/1) ... [2021-11-21 01:33:36,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:36" (1/1) ... [2021-11-21 01:33:36,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:36" (1/1) ... [2021-11-21 01:33:36,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:36" (1/1) ... [2021-11-21 01:33:36,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:33:36,970 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:33:36,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:33:36,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:33:36,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:36" (1/1) ... [2021-11-21 01:33:36,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:33:36,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:37,006 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:33:37,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:33:37,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:33:37,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:33:37,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:33:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:33:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:33:37,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:33:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:33:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:33:37,127 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:33:37,128 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:33:37,261 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:33:37,295 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:33:37,296 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 01:33:37,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:33:37 BoogieIcfgContainer [2021-11-21 01:33:37,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:33:37,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:33:37,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:33:37,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:33:37,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:33:36" (1/3) ... [2021-11-21 01:33:37,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad9b7db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:33:37, skipping insertion in model container [2021-11-21 01:33:37,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:36" (2/3) ... [2021-11-21 01:33:37,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad9b7db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:33:37, skipping insertion in model container [2021-11-21 01:33:37,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:33:37" (3/3) ... [2021-11-21 01:33:37,307 INFO L111 eAbstractionObserver]: Analyzing ICFG array_tiling_poly6.c [2021-11-21 01:33:37,313 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:33:37,313 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:33:37,360 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:33:37,368 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 01:33:37,368 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:33:37,382 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:37,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:33:37,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:37,387 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:33:37,388 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:37,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:37,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1242298325, now seen corresponding path program 1 times [2021-11-21 01:33:37,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:37,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205830664] [2021-11-21 01:33:37,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:37,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:37,647 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 01:33:37,655 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:37,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205830664] [2021-11-21 01:33:37,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205830664] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:37,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:37,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:33:37,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11316996] [2021-11-21 01:33:37,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:37,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:33:37,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:37,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:33:37,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:33:37,704 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:37,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:37,816 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2021-11-21 01:33:37,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:33:37,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-21 01:33:37,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:37,826 INFO L225 Difference]: With dead ends: 26 [2021-11-21 01:33:37,827 INFO L226 Difference]: Without dead ends: 15 [2021-11-21 01:33:37,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:33:37,854 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:37,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 9 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:33:37,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-21 01:33:37,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2021-11-21 01:33:37,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:37,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-11-21 01:33:37,904 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2021-11-21 01:33:37,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:37,905 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-11-21 01:33:37,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:37,905 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-11-21 01:33:37,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:33:37,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:37,906 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:37,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:33:37,907 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:37,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:37,908 INFO L85 PathProgramCache]: Analyzing trace with hash 747703473, now seen corresponding path program 1 times [2021-11-21 01:33:37,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:37,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941021065] [2021-11-21 01:33:37,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:37,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:37,923 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:33:37,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846658560] [2021-11-21 01:33:37,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:37,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:37,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:37,926 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:37,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:33:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:37,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:33:37,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:33:38,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:33:38,123 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:38,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941021065] [2021-11-21 01:33:38,124 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:33:38,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846658560] [2021-11-21 01:33:38,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846658560] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:38,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1585195018] [2021-11-21 01:33:38,145 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:33:38,145 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:38,150 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:38,155 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:38,156 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:38,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:38,280 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-21 01:33:38,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-21 01:33:38,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:38,359 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:33:38,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:33:38,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:38,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:38,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 97 [2021-11-21 01:33:38,687 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:38,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:38,743 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 46 treesize of output 21 [2021-11-21 01:33:38,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:38,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:38,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:38,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:38,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:38,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:38,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:38,992 INFO L354 Elim1Store]: treesize reduction 65, result has 9.7 percent of original size [2021-11-21 01:33:38,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 275 treesize of output 303 [2021-11-21 01:33:39,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:39,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:39,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 37 [2021-11-21 01:33:39,521 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:39,535 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 23 treesize of output 19 [2021-11-21 01:33:39,678 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 15 treesize of output 7 [2021-11-21 01:33:39,760 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 25 [2021-11-21 01:33:39,855 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 25 [2021-11-21 01:33:40,161 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:40,367 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:40,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:33:40,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-11-21 01:33:40,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073524852] [2021-11-21 01:33:40,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:40,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:33:40,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:40,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:33:40,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:33:40,371 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 01:33:40,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:40,406 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2021-11-21 01:33:40,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:33:40,408 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 01:33:40,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:40,408 INFO L225 Difference]: With dead ends: 18 [2021-11-21 01:33:40,409 INFO L226 Difference]: Without dead ends: 11 [2021-11-21 01:33:40,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:33:40,411 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:40,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:33:40,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-21 01:33:40,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-21 01:33:40,414 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 01:33:40,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-21 01:33:40,415 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-11-21 01:33:40,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:40,415 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-21 01:33:40,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 01:33:40,416 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-21 01:33:40,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 01:33:40,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:40,417 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:40,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:40,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:40,630 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:40,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:40,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1794093280, now seen corresponding path program 2 times [2021-11-21 01:33:40,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:40,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339425987] [2021-11-21 01:33:40,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:40,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:40,640 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:33:40,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513992842] [2021-11-21 01:33:40,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:33:40,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:40,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:40,646 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:40,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:33:40,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 01:33:40,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:33:40,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:33:40,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:40,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:40,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:40,788 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:40,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339425987] [2021-11-21 01:33:40,788 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:33:40,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513992842] [2021-11-21 01:33:40,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513992842] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:40,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [664581529] [2021-11-21 01:33:40,804 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:33:40,804 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:40,804 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:40,804 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:40,804 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:40,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:40,888 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:33:40,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:33:40,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:40,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-21 01:33:41,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:41,024 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 01:33:41,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:41,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:41,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:41,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:41,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:41,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:41,170 INFO L354 Elim1Store]: treesize reduction 78, result has 24.3 percent of original size [2021-11-21 01:33:41,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 261 treesize of output 291 [2021-11-21 01:33:41,307 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:41,365 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:41,602 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:41,659 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:41,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:41,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:41,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:41,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:41,955 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:33:41,955 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 4 case distinctions, treesize of input 269 treesize of output 224 [2021-11-21 01:33:42,225 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 23 treesize of output 19 [2021-11-21 01:33:42,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:42,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-11-21 01:33:42,426 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:42,433 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 25 [2021-11-21 01:33:42,489 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:42,496 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 25 [2021-11-21 01:33:42,782 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:42,992 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:42,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:33:42,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-21 01:33:42,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080827746] [2021-11-21 01:33:42,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:42,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:33:42,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:42,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:33:42,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:33:42,995 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:43,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:43,108 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-11-21 01:33:43,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:33:43,109 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-21 01:33:43,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:43,109 INFO L225 Difference]: With dead ends: 27 [2021-11-21 01:33:43,110 INFO L226 Difference]: Without dead ends: 22 [2021-11-21 01:33:43,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:33:43,111 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 39 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:43,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 18 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:33:43,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-21 01:33:43,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 12. [2021-11-21 01:33:43,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:43,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-11-21 01:33:43,116 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2021-11-21 01:33:43,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:43,116 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-11-21 01:33:43,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:43,117 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-11-21 01:33:43,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:33:43,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:43,117 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:43,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:43,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-21 01:33:43,330 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:43,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:43,330 INFO L85 PathProgramCache]: Analyzing trace with hash 211185835, now seen corresponding path program 3 times [2021-11-21 01:33:43,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:43,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590807840] [2021-11-21 01:33:43,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:43,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:43,339 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:33:43,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828671236] [2021-11-21 01:33:43,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:33:43,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:43,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:43,348 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:43,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:33:43,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:33:43,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:33:43,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 01:33:43,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:43,466 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 23 treesize of output 19 [2021-11-21 01:33:43,472 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:43,500 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-21 01:33:43,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-21 01:33:43,628 INFO L354 Elim1Store]: treesize reduction 445, result has 9.2 percent of original size [2021-11-21 01:33:43,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 120 treesize of output 127 [2021-11-21 01:33:43,668 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:43,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:43,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:43,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:43,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 60 [2021-11-21 01:33:43,736 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-21 01:33:43,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 27 [2021-11-21 01:33:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:43,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:44,193 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:33:44,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 87 [2021-11-21 01:33:44,218 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 21 treesize of output 10 [2021-11-21 01:33:44,263 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 20 treesize of output 10 [2021-11-21 01:33:44,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 73 [2021-11-21 01:33:44,343 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-11-21 01:33:44,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 85 [2021-11-21 01:33:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:51,874 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:51,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590807840] [2021-11-21 01:33:51,874 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:33:51,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828671236] [2021-11-21 01:33:51,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828671236] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:51,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [867403417] [2021-11-21 01:33:51,877 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:33:51,877 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:51,878 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:51,878 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:51,878 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:51,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:51,942 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:33:51,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:33:51,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:51,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-21 01:33:52,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 97 [2021-11-21 01:33:52,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 22 [2021-11-21 01:33:52,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,279 INFO L354 Elim1Store]: treesize reduction 65, result has 9.7 percent of original size [2021-11-21 01:33:52,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 275 treesize of output 303 [2021-11-21 01:33:52,403 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:52,583 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:52,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,923 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-21 01:33:52,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 326 treesize of output 253 [2021-11-21 01:33:53,215 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 23 treesize of output 19 [2021-11-21 01:33:53,226 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:53,321 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 25 [2021-11-21 01:33:53,402 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 25 [2021-11-21 01:33:53,445 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 25 [2021-11-21 01:33:53,714 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:53,997 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:53,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:33:53,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-11-21 01:33:53,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286085005] [2021-11-21 01:33:53,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:53,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 01:33:53,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:53,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 01:33:53,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:33:53,999 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 16 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:56,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:56,473 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2021-11-21 01:33:56,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 01:33:56,474 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-21 01:33:56,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:56,476 INFO L225 Difference]: With dead ends: 74 [2021-11-21 01:33:56,476 INFO L226 Difference]: Without dead ends: 72 [2021-11-21 01:33:56,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:33:56,478 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 103 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:56,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 64 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-21 01:33:56,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-21 01:33:56,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 28. [2021-11-21 01:33:56,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 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 01:33:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2021-11-21 01:33:56,488 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2021-11-21 01:33:56,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:56,488 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2021-11-21 01:33:56,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:56,489 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2021-11-21 01:33:56,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:33:56,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:56,489 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:56,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:56,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:56,705 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:56,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:56,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2093824378, now seen corresponding path program 4 times [2021-11-21 01:33:56,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:56,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927541611] [2021-11-21 01:33:56,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:56,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:56,716 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:33:56,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416742761] [2021-11-21 01:33:56,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:33:56,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:56,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:56,736 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:56,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:33:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:56,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:33:56,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:56,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:56,969 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:56,969 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:56,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927541611] [2021-11-21 01:33:56,970 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:33:56,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416742761] [2021-11-21 01:33:56,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416742761] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:56,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [171797439] [2021-11-21 01:33:56,974 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:33:56,975 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:56,975 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:56,976 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:56,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:57,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:57,046 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:33:57,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:33:57,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:57,092 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 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-21 01:33:57,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:57,184 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 01:33:57,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:57,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:57,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:57,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:57,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:57,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:57,307 INFO L354 Elim1Store]: treesize reduction 78, result has 24.3 percent of original size [2021-11-21 01:33:57,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 261 treesize of output 291 [2021-11-21 01:33:57,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:57,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:57,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:57,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:57,382 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:33:57,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 239 treesize of output 214 [2021-11-21 01:33:57,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:57,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:57,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:57,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:57,821 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:33:57,822 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 4 case distinctions, treesize of input 250 treesize of output 221 [2021-11-21 01:33:58,661 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 23 treesize of output 19 [2021-11-21 01:33:58,675 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:58,769 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 25 [2021-11-21 01:33:58,818 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:58,828 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 25 [2021-11-21 01:33:58,913 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:58,924 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 25 [2021-11-21 01:33:59,186 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:59,360 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:59,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:33:59,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-11-21 01:33:59,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406276436] [2021-11-21 01:33:59,362 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:59,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-21 01:33:59,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:59,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-21 01:33:59,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-11-21 01:33:59,364 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:59,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:59,757 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2021-11-21 01:33:59,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 01:33:59,757 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 01:33:59,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:59,758 INFO L225 Difference]: With dead ends: 80 [2021-11-21 01:33:59,758 INFO L226 Difference]: Without dead ends: 73 [2021-11-21 01:33:59,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=306, Invalid=1026, Unknown=0, NotChecked=0, Total=1332 [2021-11-21 01:33:59,760 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 77 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:59,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 142 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:33:59,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-21 01:33:59,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 31. [2021-11-21 01:33:59,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 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 01:33:59,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2021-11-21 01:33:59,769 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 13 [2021-11-21 01:33:59,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:59,770 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2021-11-21 01:33:59,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:59,770 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2021-11-21 01:33:59,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:33:59,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:59,771 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:59,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:59,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:59,993 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:59,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:59,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1448204768, now seen corresponding path program 5 times [2021-11-21 01:33:59,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:59,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338264412] [2021-11-21 01:33:59,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:59,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:00,002 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:34:00,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1021202184] [2021-11-21 01:34:00,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:34:00,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:00,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:00,017 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:00,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:34:00,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 01:34:00,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:34:00,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:34:00,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:00,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:34:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:00,300 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:00,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338264412] [2021-11-21 01:34:00,300 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:34:00,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021202184] [2021-11-21 01:34:00,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021202184] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:34:00,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [729210672] [2021-11-21 01:34:00,302 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:34:00,302 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:34:00,302 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:34:00,302 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:34:00,302 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:34:00,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:00,358 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:34:00,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:34:00,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:00,406 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 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-21 01:34:00,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:00,456 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 01:34:00,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:00,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:00,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:00,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:00,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:00,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:00,596 INFO L354 Elim1Store]: treesize reduction 78, result has 24.3 percent of original size [2021-11-21 01:34:00,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 261 treesize of output 291 [2021-11-21 01:34:00,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:00,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:00,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:00,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:00,805 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:34:00,805 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 4 case distinctions, treesize of input 260 treesize of output 223 [2021-11-21 01:34:01,545 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:01,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:34:01,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-21 01:34:01,715 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:01,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-11-21 01:34:01,800 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 25 [2021-11-21 01:34:02,010 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:34:02,190 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:34:02,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:34:02,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-21 01:34:02,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574316575] [2021-11-21 01:34:02,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:34:02,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-21 01:34:02,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:02,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-21 01:34:02,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-11-21 01:34:02,192 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:02,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:02,458 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2021-11-21 01:34:02,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-21 01:34:02,458 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 01:34:02,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:02,459 INFO L225 Difference]: With dead ends: 105 [2021-11-21 01:34:02,459 INFO L226 Difference]: Without dead ends: 81 [2021-11-21 01:34:02,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2021-11-21 01:34:02,461 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 176 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:02,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 46 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:34:02,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-21 01:34:02,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 40. [2021-11-21 01:34:02,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2021-11-21 01:34:02,472 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 13 [2021-11-21 01:34:02,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:02,472 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2021-11-21 01:34:02,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:02,472 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2021-11-21 01:34:02,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 01:34:02,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:02,473 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:34:02,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:34:02,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:02,675 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:34:02,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:02,675 INFO L85 PathProgramCache]: Analyzing trace with hash 213749011, now seen corresponding path program 1 times [2021-11-21 01:34:02,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:02,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137828728] [2021-11-21 01:34:02,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:02,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:02,682 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:34:02,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494809848] [2021-11-21 01:34:02,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:02,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:02,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:02,684 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:02,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:34:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:02,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-21 01:34:02,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:02,872 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 23 treesize of output 19 [2021-11-21 01:34:02,879 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:02,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:02,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-21 01:34:02,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:02,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:02,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:02,933 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:34:02,933 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 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-21 01:34:03,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:03,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:03,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:03,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:34:03,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 37 [2021-11-21 01:34:03,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:03,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:03,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:03,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:34:03,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 39 [2021-11-21 01:34:03,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:03,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:03,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:03,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:34:03,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 41 [2021-11-21 01:34:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:03,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:34:06,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:34:06,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 730 treesize of output 730 [2021-11-21 01:34:06,966 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 20 treesize of output 10 [2021-11-21 01:34:07,265 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 21 treesize of output 10 [2021-11-21 01:34:07,461 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 722 treesize of output 686 [2021-11-21 01:34:08,174 INFO L354 Elim1Store]: treesize reduction 117, result has 21.5 percent of original size [2021-11-21 01:34:08,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 132772 treesize of output 130072 [2021-11-21 01:34:15,292 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:15,293 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:15,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137828728] [2021-11-21 01:34:15,293 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:34:15,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494809848] [2021-11-21 01:34:15,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494809848] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:34:15,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1228636504] [2021-11-21 01:34:15,295 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:34:15,295 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:34:15,296 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:34:15,296 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:34:15,296 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:34:15,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:15,347 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:34:15,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:34:15,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:15,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-21 01:34:15,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:15,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:15,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 97 [2021-11-21 01:34:15,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:15,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 25 [2021-11-21 01:34:15,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:15,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:15,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:15,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:15,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:15,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:15,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:15,648 INFO L354 Elim1Store]: treesize reduction 65, result has 9.7 percent of original size [2021-11-21 01:34:15,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 275 treesize of output 303 [2021-11-21 01:34:15,704 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:15,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:15,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:15,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:15,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:15,751 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-21 01:34:15,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 280 treesize of output 219 [2021-11-21 01:34:16,117 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:16,131 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 23 treesize of output 19 [2021-11-21 01:34:16,218 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:16,232 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 25 [2021-11-21 01:34:16,272 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:16,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 25 [2021-11-21 01:34:16,336 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 25 [2021-11-21 01:34:17,262 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:34:18,340 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:34:18,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:34:18,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-11-21 01:34:18,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539840129] [2021-11-21 01:34:18,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:34:18,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-21 01:34:18,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:18,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-21 01:34:18,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:34:18,343 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 26 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 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 01:34:35,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:35,152 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2021-11-21 01:34:35,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-21 01:34:35,152 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 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 15 [2021-11-21 01:34:35,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:35,154 INFO L225 Difference]: With dead ends: 69 [2021-11-21 01:34:35,154 INFO L226 Difference]: Without dead ends: 55 [2021-11-21 01:34:35,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=311, Invalid=2139, Unknown=0, NotChecked=0, Total=2450 [2021-11-21 01:34:35,156 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 34 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:35,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-21 01:34:35,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-21 01:34:35,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2021-11-21 01:34:35,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 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 01:34:35,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-11-21 01:34:35,172 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 15 [2021-11-21 01:34:35,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:35,173 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-11-21 01:34:35,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 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 01:34:35,173 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-11-21 01:34:35,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 01:34:35,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:35,175 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2021-11-21 01:34:35,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:34:35,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:35,401 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:34:35,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:35,402 INFO L85 PathProgramCache]: Analyzing trace with hash -844879183, now seen corresponding path program 6 times [2021-11-21 01:34:35,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:35,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907554452] [2021-11-21 01:34:35,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:35,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:35,409 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:34:35,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [691126160] [2021-11-21 01:34:35,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:34:35,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:35,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:35,410 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:35,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:34:35,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:34:35,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:34:35,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-21 01:34:35,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:35,723 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 01:34:35,759 INFO L354 Elim1Store]: treesize reduction 74, result has 16.9 percent of original size [2021-11-21 01:34:35,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 82 [2021-11-21 01:34:35,784 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:35,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:35,801 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 28 treesize of output 11 [2021-11-21 01:34:35,860 INFO L354 Elim1Store]: treesize reduction 212, result has 17.5 percent of original size [2021-11-21 01:34:35,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 123 [2021-11-21 01:34:35,888 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:35,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:35,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:35,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:35,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 46 [2021-11-21 01:34:35,971 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-11-21 01:34:35,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 46 [2021-11-21 01:34:36,037 INFO L354 Elim1Store]: treesize reduction 164, result has 17.6 percent of original size [2021-11-21 01:34:36,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 50 treesize of output 58 [2021-11-21 01:34:36,262 INFO L354 Elim1Store]: treesize reduction 940, result has 10.6 percent of original size [2021-11-21 01:34:36,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 147 treesize of output 202 [2021-11-21 01:34:36,279 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:36,350 INFO L354 Elim1Store]: treesize reduction 316, result has 0.9 percent of original size [2021-11-21 01:34:36,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 176 treesize of output 102 [2021-11-21 01:34:36,434 INFO L354 Elim1Store]: treesize reduction 218, result has 13.8 percent of original size [2021-11-21 01:34:36,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 67 treesize of output 63 [2021-11-21 01:34:36,511 INFO L354 Elim1Store]: treesize reduction 218, result has 13.8 percent of original size [2021-11-21 01:34:36,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 69 treesize of output 65 [2021-11-21 01:34:36,602 INFO L354 Elim1Store]: treesize reduction 218, result has 13.8 percent of original size [2021-11-21 01:34:36,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 71 treesize of output 67 [2021-11-21 01:34:36,699 INFO L354 Elim1Store]: treesize reduction 218, result has 13.8 percent of original size [2021-11-21 01:34:36,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 73 treesize of output 69 [2021-11-21 01:34:36,820 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:36,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:34:45,238 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:34:45,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 138 treesize of output 138 [2021-11-21 01:34:45,276 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 20 treesize of output 10 [2021-11-21 01:34:45,523 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 21 treesize of output 10 [2021-11-21 01:34:45,623 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 129 treesize of output 123 [2021-11-21 01:34:45,688 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-11-21 01:34:45,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1195 treesize of output 1186 [2021-11-21 01:34:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:47,696 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:47,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907554452] [2021-11-21 01:34:47,696 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:34:47,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691126160] [2021-11-21 01:34:47,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691126160] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:34:47,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [71543235] [2021-11-21 01:34:47,698 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:34:47,698 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:34:47,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:34:47,699 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:34:47,699 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:34:47,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:47,737 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:34:47,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:34:47,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:47,788 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 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-21 01:34:47,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:47,860 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 01:34:47,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:47,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:47,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:47,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:47,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:47,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:47,991 INFO L354 Elim1Store]: treesize reduction 78, result has 24.3 percent of original size [2021-11-21 01:34:47,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 261 treesize of output 291 [2021-11-21 01:34:48,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:48,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:48,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:48,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:48,152 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:34:48,152 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 4 case distinctions, treesize of input 250 treesize of output 221 [2021-11-21 01:34:48,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:48,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:48,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:48,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:48,532 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:34:48,533 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 4 case distinctions, treesize of input 239 treesize of output 214 [2021-11-21 01:34:49,029 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 23 treesize of output 19 [2021-11-21 01:34:49,053 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:49,171 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 15 treesize of output 7 [2021-11-21 01:34:49,202 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 25 [2021-11-21 01:34:49,260 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 25 [2021-11-21 01:34:49,525 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:34:50,126 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:34:50,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:34:50,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-11-21 01:34:50,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223185433] [2021-11-21 01:34:50,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:34:50,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-21 01:34:50,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:50,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-21 01:34:50,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 01:34:50,128 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 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 01:34:56,127 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:35:23,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:23,306 INFO L93 Difference]: Finished difference Result 143 states and 164 transitions. [2021-11-21 01:35:23,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-21 01:35:23,307 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 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 16 [2021-11-21 01:35:23,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:23,308 INFO L225 Difference]: With dead ends: 143 [2021-11-21 01:35:23,309 INFO L226 Difference]: Without dead ends: 141 [2021-11-21 01:35:23,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=581, Invalid=1969, Unknown=0, NotChecked=0, Total=2550 [2021-11-21 01:35:23,311 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 280 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:23,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 124 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 14.2s Time] [2021-11-21 01:35:23,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-21 01:35:23,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 69. [2021-11-21 01:35:23,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 68 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:23,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2021-11-21 01:35:23,330 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 16 [2021-11-21 01:35:23,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:23,330 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2021-11-21 01:35:23,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 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 01:35:23,331 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2021-11-21 01:35:23,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 01:35:23,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:23,332 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:23,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:23,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:23,537 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:35:23,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:23,538 INFO L85 PathProgramCache]: Analyzing trace with hash -665154215, now seen corresponding path program 2 times [2021-11-21 01:35:23,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:35:23,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278052790] [2021-11-21 01:35:23,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:23,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:35:23,543 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:35:23,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47608499] [2021-11-21 01:35:23,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:35:23,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:23,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:35:23,555 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:35:23,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b60d3d14-2769-455f-8a23-fbbe54ab24d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:35:23,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:35:23,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:35:23,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-21 01:35:23,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:23,813 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 23 treesize of output 19 [2021-11-21 01:35:23,817 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:23,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:23,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:23,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 104 [2021-11-21 01:35:23,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:23,868 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 18 [2021-11-21 01:35:23,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:23,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:23,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:23,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:35:23,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-21 01:35:24,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:35:24,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 129 treesize of output 169 [2021-11-21 01:35:24,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 71 [2021-11-21 01:35:24,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:24,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,127 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-21 01:35:24,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 129 treesize of output 179 [2021-11-21 01:35:24,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:24,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 92 [2021-11-21 01:35:24,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:35:24,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 41 [2021-11-21 01:35:24,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,375 INFO L354 Elim1Store]: treesize reduction 168, result has 25.7 percent of original size [2021-11-21 01:35:24,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 133 treesize of output 203 [2021-11-21 01:35:24,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 95 [2021-11-21 01:35:24,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:24,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:35:24,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 134 [2021-11-21 01:35:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:25,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:36:51,430 WARN L227 SmtUtils]: Spent 12.67s on a formula simplification that was a NOOP. DAG size: 125 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:37:00,338 WARN L227 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:37:24,437 WARN L227 SmtUtils]: Spent 6.59s on a formula simplification. DAG size of input: 89 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:37:38,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:37:38,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 2908 treesize of output 2908 [2021-11-21 01:37:40,844 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 19 treesize of output 9 [2021-11-21 01:37:40,879 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 20 treesize of output 9 [2021-11-21 01:37:40,907 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 2898 treesize of output 2766 [2021-11-21 01:38:25,768 INFO L354 Elim1Store]: treesize reduction 249, result has 28.7 percent of original size [2021-11-21 01:38:25,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 35516778490 treesize of output 34867528396