./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_1.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_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/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_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/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_64f32558-e5d9-4bf0-be6e-8400cc97d72a/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 a899e425fabfbfedb683b8dde873d61190b064645b1f5edf26c70c4b83dfe4a2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:59:15,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:59:15,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:59:15,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:59:15,799 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:59:15,804 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:59:15,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:59:15,810 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:59:15,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:59:15,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:59:15,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:59:15,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:59:15,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:59:15,824 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:59:15,826 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:59:15,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:59:15,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:59:15,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:59:15,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:59:15,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:59:15,848 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:59:15,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:59:15,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:59:15,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:59:15,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:59:15,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:59:15,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:59:15,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:59:15,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:59:15,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:59:15,869 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:59:15,870 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:59:15,872 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:59:15,873 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:59:15,874 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:59:15,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:59:15,875 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:59:15,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:59:15,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:59:15,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:59:15,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:59:15,878 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:59:15,926 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:59:15,926 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:59:15,927 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:59:15,927 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:59:15,934 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:59:15,935 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:59:15,935 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:59:15,935 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:59:15,935 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:59:15,935 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:59:15,936 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:59:15,937 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:59:15,937 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:59:15,937 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:59:15,937 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:59:15,937 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:59:15,938 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:59:15,938 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:59:15,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:59:15,939 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:59:15,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:59:15,940 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:59:15,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:59:15,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:59:15,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:59:15,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:59:15,942 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:59:15,942 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:59:15,942 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:59:15,943 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:59:15,943 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:59:15,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:59:15,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:59:15,944 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:59:15,944 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:59:15,944 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:59:15,944 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:59:15,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:59:15,945 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:59:15,945 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:59:15,945 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:59:15,945 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_64f32558-e5d9-4bf0-be6e-8400cc97d72a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a899e425fabfbfedb683b8dde873d61190b064645b1f5edf26c70c4b83dfe4a2 [2021-11-21 00:59:16,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:59:16,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:59:16,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:59:16,268 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:59:16,269 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:59:16,271 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-programs/partial_mod_count_1.c [2021-11-21 00:59:16,341 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/data/9879557c3/b45c4caa249247da91eeccc8983170da/FLAG55f351bfa [2021-11-21 00:59:16,867 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:59:16,868 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/sv-benchmarks/c/array-programs/partial_mod_count_1.c [2021-11-21 00:59:16,879 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/data/9879557c3/b45c4caa249247da91eeccc8983170da/FLAG55f351bfa [2021-11-21 00:59:17,230 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/data/9879557c3/b45c4caa249247da91eeccc8983170da [2021-11-21 00:59:17,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:59:17,234 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:59:17,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:59:17,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:59:17,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:59:17,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:59:17" (1/1) ... [2021-11-21 00:59:17,256 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39afa233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:59:17, skipping insertion in model container [2021-11-21 00:59:17,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:59:17" (1/1) ... [2021-11-21 00:59:17,263 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:59:17,276 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:59:17,507 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/sv-benchmarks/c/array-programs/partial_mod_count_1.c[323,336] [2021-11-21 00:59:17,523 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:59:17,530 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:59:17,542 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_64f32558-e5d9-4bf0-be6e-8400cc97d72a/sv-benchmarks/c/array-programs/partial_mod_count_1.c[323,336] [2021-11-21 00:59:17,549 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:59:17,563 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:59:17,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:59:17 WrapperNode [2021-11-21 00:59:17,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:59:17,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:59:17,565 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:59:17,565 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:59:17,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:59:17" (1/1) ... [2021-11-21 00:59:17,579 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:59:17" (1/1) ... [2021-11-21 00:59:17,609 INFO L137 Inliner]: procedures = 13, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2021-11-21 00:59:17,610 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:59:17,611 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:59:17,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:59:17,611 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:59:17,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:59:17" (1/1) ... [2021-11-21 00:59:17,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:59:17" (1/1) ... [2021-11-21 00:59:17,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:59:17" (1/1) ... [2021-11-21 00:59:17,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:59:17" (1/1) ... [2021-11-21 00:59:17,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:59:17" (1/1) ... [2021-11-21 00:59:17,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:59:17" (1/1) ... [2021-11-21 00:59:17,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:59:17" (1/1) ... [2021-11-21 00:59:17,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:59:17,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:59:17,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:59:17,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:59:17,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:59:17" (1/1) ... [2021-11-21 00:59:17,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:59:17,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:59:17,696 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:59:17,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:59:17,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:59:17,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:59:17,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:59:17,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:59:17,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:59:17,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:59:17,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:59:17,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:59:17,823 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:59:17,825 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:59:18,016 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:59:18,070 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:59:18,071 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 00:59:18,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:59:18 BoogieIcfgContainer [2021-11-21 00:59:18,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:59:18,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:59:18,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:59:18,079 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:59:18,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:59:17" (1/3) ... [2021-11-21 00:59:18,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca054e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:59:18, skipping insertion in model container [2021-11-21 00:59:18,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:59:17" (2/3) ... [2021-11-21 00:59:18,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca054e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:59:18, skipping insertion in model container [2021-11-21 00:59:18,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:59:18" (3/3) ... [2021-11-21 00:59:18,082 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_1.c [2021-11-21 00:59:18,091 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:59:18,091 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:59:18,163 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:59:18,171 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:59:18,171 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:59:18,185 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:18,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 00:59:18,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:59:18,190 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 00:59:18,191 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:59:18,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:59:18,197 INFO L85 PathProgramCache]: Analyzing trace with hash 83296886, now seen corresponding path program 1 times [2021-11-21 00:59:18,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:59:18,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031368159] [2021-11-21 00:59:18,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:18,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:59:18,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:59:18,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:59:18,418 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:59:18,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031368159] [2021-11-21 00:59:18,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031368159] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:59:18,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:59:18,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:59:18,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502160128] [2021-11-21 00:59:18,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:59:18,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:59:18,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:59:18,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:59:18,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:59:18,467 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:18,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:59:18,520 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2021-11-21 00:59:18,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:59:18,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-11-21 00:59:18,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:59:18,531 INFO L225 Difference]: With dead ends: 15 [2021-11-21 00:59:18,531 INFO L226 Difference]: Without dead ends: 8 [2021-11-21 00:59:18,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:59:18,541 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:59:18,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:59:18,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-21 00:59:18,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-21 00:59:18,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:18,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-11-21 00:59:18,570 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2021-11-21 00:59:18,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:59:18,571 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-11-21 00:59:18,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:18,571 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-11-21 00:59:18,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:59:18,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:59:18,572 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:59:18,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:59:18,573 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:59:18,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:59:18,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1709852021, now seen corresponding path program 1 times [2021-11-21 00:59:18,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:59:18,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625062296] [2021-11-21 00:59:18,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:18,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:59:18,587 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:59:18,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406194261] [2021-11-21 00:59:18,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:18,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:59:18,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:59:18,590 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:59:18,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:59:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:59:18,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:59:18,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:59:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:59:18,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:59:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:59:18,753 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:59:18,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625062296] [2021-11-21 00:59:18,753 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:59:18,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406194261] [2021-11-21 00:59:18,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406194261] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:59:18,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [117724042] [2021-11-21 00:59:18,774 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-21 00:59:18,774 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:59:18,779 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:59:18,784 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:59:18,785 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:59:18,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:18,908 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-21 00:59:18,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-21 00:59:18,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:19,007 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:59:19,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 00:59:19,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:19,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:19,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:19,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:19,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 162 [2021-11-21 00:59:19,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:59:19,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:19,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 24 [2021-11-21 00:59:19,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:19,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 29 [2021-11-21 00:59:19,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:19,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:19,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:19,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:19,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:19,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:19,832 INFO L354 Elim1Store]: treesize reduction 141, result has 13.5 percent of original size [2021-11-21 00:59:19,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 322 treesize of output 372 [2021-11-21 00:59:19,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:19,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:19,912 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 66 treesize of output 40 [2021-11-21 00:59:19,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:19,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:19,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:19,978 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-21 00:59:19,979 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 273 treesize of output 230 [2021-11-21 00:59:20,519 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:59:20,540 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 26 treesize of output 22 [2021-11-21 00:59:20,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:59:20,932 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:59:21,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [117724042] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:59:21,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:59:21,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 8 [2021-11-21 00:59:21,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441296146] [2021-11-21 00:59:21,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:59:21,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:59:21,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:59:21,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:59:21,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:59:21,104 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. 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 00:59:21,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:59:21,153 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2021-11-21 00:59:21,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:59:21,154 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 00:59:21,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:59:21,155 INFO L225 Difference]: With dead ends: 13 [2021-11-21 00:59:21,155 INFO L226 Difference]: Without dead ends: 11 [2021-11-21 00:59:21,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:59:21,157 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:59:21,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 5 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:59:21,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-21 00:59:21,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2021-11-21 00:59:21,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:21,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-21 00:59:21,161 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-11-21 00:59:21,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:59:21,162 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-21 00:59:21,162 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 00:59:21,162 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-21 00:59:21,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 00:59:21,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:59:21,163 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:59:21,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:59:21,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-21 00:59:21,364 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:59:21,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:59:21,365 INFO L85 PathProgramCache]: Analyzing trace with hash 115757833, now seen corresponding path program 1 times [2021-11-21 00:59:21,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:59:21,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208025095] [2021-11-21 00:59:21,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:21,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:59:21,375 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:59:21,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950784659] [2021-11-21 00:59:21,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:21,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:59:21,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:59:21,377 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:59:21,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:59:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:59:21,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:59:21,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:59:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:59:21,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:59:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:59:21,549 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:59:21,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208025095] [2021-11-21 00:59:21,550 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:59:21,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950784659] [2021-11-21 00:59:21,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950784659] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:59:21,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [848380348] [2021-11-21 00:59:21,554 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 00:59:21,554 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:59:21,555 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:59:21,555 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:59:21,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:59:21,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:21,639 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-21 00:59:21,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-21 00:59:21,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:21,710 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:59:21,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 00:59:21,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:21,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:21,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:21,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:21,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 127 [2021-11-21 00:59:21,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:21,901 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 34 treesize of output 22 [2021-11-21 00:59:21,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:21,924 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 39 treesize of output 23 [2021-11-21 00:59:22,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:22,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:22,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:22,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:22,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:59:22,214 INFO L354 Elim1Store]: treesize reduction 214, result has 22.2 percent of original size [2021-11-21 00:59:22,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 315 treesize of output 373 [2021-11-21 00:59:22,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:22,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:59:22,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 54 [2021-11-21 00:59:22,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:59:22,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:22,941 INFO L354 Elim1Store]: treesize reduction 29, result has 25.6 percent of original size [2021-11-21 00:59:22,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 214 treesize of output 191 [2021-11-21 00:59:23,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:59:23,395 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:59:23,422 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 26 treesize of output 22 [2021-11-21 00:59:24,617 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:59:25,026 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:59:25,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:59:25,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-11-21 00:59:25,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892231220] [2021-11-21 00:59:25,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:59:25,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:59:25,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:59:25,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:59:25,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:59:25,029 INFO L87 Difference]: Start difference. First operand 10 states and 11 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 00:59:25,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:59:25,069 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-11-21 00:59:25,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:59:25,069 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 9 [2021-11-21 00:59:25,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:59:25,070 INFO L225 Difference]: With dead ends: 20 [2021-11-21 00:59:25,070 INFO L226 Difference]: Without dead ends: 13 [2021-11-21 00:59:25,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:59:25,072 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:59:25,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:59:25,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-21 00:59:25,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-21 00:59:25,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:25,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-21 00:59:25,076 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2021-11-21 00:59:25,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:59:25,077 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-21 00:59:25,077 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 00:59:25,077 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-21 00:59:25,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 00:59:25,078 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:59:25,078 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 00:59:25,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:59:25,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:59:25,279 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:59:25,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:59:25,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1538090498, now seen corresponding path program 2 times [2021-11-21 00:59:25,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:59:25,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10483554] [2021-11-21 00:59:25,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:25,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:59:25,288 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:59:25,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261048094] [2021-11-21 00:59:25,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:59:25,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:59:25,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:59:25,297 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:59:25,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:59:25,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 00:59:25,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:59:25,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 00:59:25,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:59:25,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:59:25,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 67 [2021-11-21 00:59:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:59:25,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:59:26,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:59:26,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 138 [2021-11-21 00:59:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:59:26,788 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:59:26,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10483554] [2021-11-21 00:59:26,789 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:59:26,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261048094] [2021-11-21 00:59:26,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261048094] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:59:26,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1223900383] [2021-11-21 00:59:26,792 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 00:59:26,793 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:59:26,793 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:59:26,793 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:59:26,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:59:26,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:26,849 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-21 00:59:26,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-21 00:59:26,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:26,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:26,911 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:59:26,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 00:59:27,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:27,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:27,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:27,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:27,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 127 [2021-11-21 00:59:27,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:27,113 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 54 treesize of output 34 [2021-11-21 00:59:27,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:27,129 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 45 treesize of output 29 [2021-11-21 00:59:27,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:27,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:27,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:27,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:27,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:59:27,358 INFO L354 Elim1Store]: treesize reduction 214, result has 22.2 percent of original size [2021-11-21 00:59:27,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 315 treesize of output 373 [2021-11-21 00:59:27,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:27,912 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 47 treesize of output 30 [2021-11-21 00:59:28,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:28,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:28,081 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 58 treesize of output 37 [2021-11-21 00:59:28,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:59:28,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:28,455 INFO L354 Elim1Store]: treesize reduction 29, result has 25.6 percent of original size [2021-11-21 00:59:28,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 214 treesize of output 199 [2021-11-21 00:59:29,023 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 26 treesize of output 22 [2021-11-21 00:59:29,039 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:59:29,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:59:30,237 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:59:30,472 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:59:30,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:59:30,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-21 00:59:30,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842289008] [2021-11-21 00:59:30,473 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:59:30,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:59:30,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:59:30,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:59:30,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:59:30,474 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:30,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:59:30,575 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-11-21 00:59:30,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:59:30,576 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-21 00:59:30,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:59:30,577 INFO L225 Difference]: With dead ends: 21 [2021-11-21 00:59:30,577 INFO L226 Difference]: Without dead ends: 19 [2021-11-21 00:59:30,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:59:30,578 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:59:30,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2021-11-21 00:59:30,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-21 00:59:30,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-21 00:59:30,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:30,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-11-21 00:59:30,590 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2021-11-21 00:59:30,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:59:30,591 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-11-21 00:59:30,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:30,592 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-11-21 00:59:30,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 00:59:30,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:59:30,593 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2021-11-21 00:59:30,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:59:30,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:59:30,818 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:59:30,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:59:30,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1414643970, now seen corresponding path program 3 times [2021-11-21 00:59:30,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:59:30,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132124771] [2021-11-21 00:59:30,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:30,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:59:30,829 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:59:30,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [130023003] [2021-11-21 00:59:30,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:59:30,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:59:30,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:59:30,830 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:59:30,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:59:30,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:59:30,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:59:30,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:59:30,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:59:30,971 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:59:30,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:59:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:59:31,053 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:59:31,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132124771] [2021-11-21 00:59:31,054 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:59:31,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130023003] [2021-11-21 00:59:31,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130023003] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:59:31,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1295021917] [2021-11-21 00:59:31,056 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 00:59:31,056 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:59:31,056 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:59:31,057 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:59:31,057 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:59:31,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:31,096 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-21 00:59:31,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-21 00:59:31,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:31,157 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:59:31,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 00:59:31,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:31,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:31,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:31,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:31,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 162 [2021-11-21 00:59:31,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:31,299 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 39 treesize of output 22 [2021-11-21 00:59:31,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:31,324 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 37 treesize of output 20 [2021-11-21 00:59:31,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:31,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:31,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:31,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:31,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:31,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:31,517 INFO L354 Elim1Store]: treesize reduction 141, result has 13.5 percent of original size [2021-11-21 00:59:31,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 322 treesize of output 372 [2021-11-21 00:59:31,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:31,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:31,566 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 68 treesize of output 42 [2021-11-21 00:59:31,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:31,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:31,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:31,646 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-21 00:59:31,647 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 271 treesize of output 237 [2021-11-21 00:59:32,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:59:32,057 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 26 treesize of output 22 [2021-11-21 00:59:32,076 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:59:33,179 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:59:33,347 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:59:33,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:59:33,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-11-21 00:59:33,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914016092] [2021-11-21 00:59:33,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:59:33,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 00:59:33,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:59:33,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 00:59:33,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:59:33,350 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:33,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:59:33,397 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2021-11-21 00:59:33,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 00:59:33,398 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-21 00:59:33,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:59:33,399 INFO L225 Difference]: With dead ends: 38 [2021-11-21 00:59:33,399 INFO L226 Difference]: Without dead ends: 25 [2021-11-21 00:59:33,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:59:33,400 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:59:33,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:59:33,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-21 00:59:33,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-21 00:59:33,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:33,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-11-21 00:59:33,408 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2021-11-21 00:59:33,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:59:33,408 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-11-21 00:59:33,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:33,409 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-11-21 00:59:33,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 00:59:33,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:59:33,410 INFO L514 BasicCegarLoop]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1] [2021-11-21 00:59:33,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:59:33,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:59:33,622 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:59:33,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:59:33,623 INFO L85 PathProgramCache]: Analyzing trace with hash 965901086, now seen corresponding path program 4 times [2021-11-21 00:59:33,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:59:33,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12859606] [2021-11-21 00:59:33,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:33,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:59:33,632 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:59:33,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372258477] [2021-11-21 00:59:33,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:59:33,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:59:33,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:59:33,641 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:59:33,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:59:33,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:59:33,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 00:59:33,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:59:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:59:33,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:59:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:59:34,156 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:59:34,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12859606] [2021-11-21 00:59:34,156 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:59:34,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372258477] [2021-11-21 00:59:34,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372258477] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:59:34,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2108580476] [2021-11-21 00:59:34,158 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 00:59:34,158 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:59:34,159 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:59:34,159 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:59:34,159 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:59:34,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:34,215 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:59:34,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 00:59:34,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:34,255 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 00:59:34,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:34,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:34,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:34,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:34,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 127 [2021-11-21 00:59:34,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:34,371 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 32 treesize of output 20 [2021-11-21 00:59:34,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:34,390 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 34 treesize of output 22 [2021-11-21 00:59:34,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:34,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:34,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:34,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:34,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:59:34,623 INFO L354 Elim1Store]: treesize reduction 214, result has 22.2 percent of original size [2021-11-21 00:59:34,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 315 treesize of output 373 [2021-11-21 00:59:35,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:35,021 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 47 treesize of output 30 [2021-11-21 00:59:35,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:35,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:35,097 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 54 treesize of output 33 [2021-11-21 00:59:35,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:59:35,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:35,426 INFO L354 Elim1Store]: treesize reduction 29, result has 25.6 percent of original size [2021-11-21 00:59:35,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 208 treesize of output 181 [2021-11-21 00:59:36,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:59:36,076 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 26 treesize of output 22 [2021-11-21 00:59:36,088 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:59:36,952 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:59:37,277 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:59:37,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:59:37,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-11-21 00:59:37,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978076619] [2021-11-21 00:59:37,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:59:37,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-21 00:59:37,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:59:37,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-21 00:59:37,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=524, Unknown=0, NotChecked=0, Total=812 [2021-11-21 00:59:37,280 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:37,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:59:37,346 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-11-21 00:59:37,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 00:59:37,347 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 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 24 [2021-11-21 00:59:37,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:59:37,348 INFO L225 Difference]: With dead ends: 50 [2021-11-21 00:59:37,348 INFO L226 Difference]: Without dead ends: 37 [2021-11-21 00:59:37,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=288, Invalid=524, Unknown=0, NotChecked=0, Total=812 [2021-11-21 00:59:37,350 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:59:37,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:59:37,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-21 00:59:37,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-21 00:59:37,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:37,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-11-21 00:59:37,360 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 24 [2021-11-21 00:59:37,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:59:37,360 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-11-21 00:59:37,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:37,360 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-11-21 00:59:37,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 00:59:37,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:59:37,361 INFO L514 BasicCegarLoop]: trace histogram [22, 4, 3, 3, 1, 1, 1, 1] [2021-11-21 00:59:37,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-21 00:59:37,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 00:59:37,562 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:59:37,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:59:37,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1125373090, now seen corresponding path program 5 times [2021-11-21 00:59:37,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:59:37,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529495922] [2021-11-21 00:59:37,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:37,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:59:37,569 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:59:37,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420631685] [2021-11-21 00:59:37,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:59:37,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:59:37,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:59:37,595 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:59:37,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:59:37,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 00:59:37,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:59:37,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 00:59:37,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:59:38,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:59:38,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 67 [2021-11-21 00:59:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-21 00:59:38,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:59:39,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:59:39,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 186 treesize of output 298 [2021-11-21 00:59:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-21 00:59:41,496 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:59:41,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529495922] [2021-11-21 00:59:41,496 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:59:41,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420631685] [2021-11-21 00:59:41,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420631685] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:59:41,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1831731225] [2021-11-21 00:59:41,498 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 00:59:41,498 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:59:41,498 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:59:41,498 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:59:41,499 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:59:41,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:41,537 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:59:41,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 00:59:41,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:41,572 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 00:59:41,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:41,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:41,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:41,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:41,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 127 [2021-11-21 00:59:41,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:41,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-11-21 00:59:41,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:41,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-11-21 00:59:41,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:41,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:41,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:41,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:41,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:59:41,874 INFO L354 Elim1Store]: treesize reduction 214, result has 22.2 percent of original size [2021-11-21 00:59:41,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 315 treesize of output 373 [2021-11-21 00:59:42,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:42,346 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 47 treesize of output 30 [2021-11-21 00:59:42,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:42,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:42,498 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 58 treesize of output 37 [2021-11-21 00:59:42,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:59:42,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:59:42,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:42,863 INFO L354 Elim1Store]: treesize reduction 29, result has 25.6 percent of original size [2021-11-21 00:59:42,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 214 treesize of output 195 [2021-11-21 00:59:43,483 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 26 treesize of output 22 [2021-11-21 00:59:43,505 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:59:43,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:59:44,589 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:59:44,775 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:59:44,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:59:44,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-21 00:59:44,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191637115] [2021-11-21 00:59:44,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:59:44,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 00:59:44,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:59:44,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 00:59:44,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-11-21 00:59:44,776 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 00:59:45,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:59:45,396 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-11-21 00:59:45,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 00:59:45,397 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 36 [2021-11-21 00:59:45,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:59:45,398 INFO L225 Difference]: With dead ends: 51 [2021-11-21 00:59:45,399 INFO L226 Difference]: Without dead ends: 49 [2021-11-21 00:59:45,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2021-11-21 00:59:45,400 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:59:45,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 15 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-11-21 00:59:45,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-21 00:59:45,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-21 00:59:45,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:45,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-11-21 00:59:45,411 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 36 [2021-11-21 00:59:45,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:59:45,412 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-11-21 00:59:45,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 00:59:45,412 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-11-21 00:59:45,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-21 00:59:45,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:59:45,414 INFO L514 BasicCegarLoop]: trace histogram [22, 8, 7, 7, 1, 1, 1, 1] [2021-11-21 00:59:45,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-21 00:59:45,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 00:59:45,621 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:59:45,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:59:45,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1981504162, now seen corresponding path program 6 times [2021-11-21 00:59:45,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:59:45,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654236875] [2021-11-21 00:59:45,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:45,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:59:45,632 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:59:45,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28135895] [2021-11-21 00:59:45,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:59:45,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:59:45,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:59:45,640 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:59:45,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:59:45,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:59:45,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:59:45,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-21 00:59:45,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:59:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 00:59:46,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:59:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 00:59:46,997 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:59:46,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654236875] [2021-11-21 00:59:46,997 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:59:46,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28135895] [2021-11-21 00:59:46,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28135895] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:59:46,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1323304855] [2021-11-21 00:59:47,000 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 00:59:47,000 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:59:47,000 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:59:47,000 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:59:47,000 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:59:47,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:47,043 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:59:47,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 00:59:47,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:47,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-21 00:59:47,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:47,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:47,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:47,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:47,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 162 [2021-11-21 00:59:47,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:47,220 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 63 treesize of output 38 [2021-11-21 00:59:47,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:47,239 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 61 treesize of output 36 [2021-11-21 00:59:47,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:47,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:47,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:47,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:47,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:47,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:47,400 INFO L354 Elim1Store]: treesize reduction 141, result has 13.5 percent of original size [2021-11-21 00:59:47,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 322 treesize of output 372 [2021-11-21 00:59:47,460 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:59:47,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:47,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:47,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:47,541 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-21 00:59:47,542 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 282 treesize of output 244 [2021-11-21 00:59:47,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:47,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:47,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:47,712 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-21 00:59:47,712 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 225 treesize of output 174 [2021-11-21 00:59:47,990 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:59:48,006 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 26 treesize of output 22 [2021-11-21 00:59:48,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:59:48,972 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:59:49,190 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:59:49,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:59:49,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2021-11-21 00:59:49,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537084592] [2021-11-21 00:59:49,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:59:49,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-21 00:59:49,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:59:49,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-21 00:59:49,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1144, Invalid=1612, Unknown=0, NotChecked=0, Total=2756 [2021-11-21 00:59:49,195 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:49,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:59:49,352 INFO L93 Difference]: Finished difference Result 98 states and 123 transitions. [2021-11-21 00:59:49,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-21 00:59:49,353 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 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 48 [2021-11-21 00:59:49,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:59:49,354 INFO L225 Difference]: With dead ends: 98 [2021-11-21 00:59:49,354 INFO L226 Difference]: Without dead ends: 73 [2021-11-21 00:59:49,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1144, Invalid=1612, Unknown=0, NotChecked=0, Total=2756 [2021-11-21 00:59:49,356 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:59:49,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:59:49,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-21 00:59:49,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-11-21 00:59:49,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:49,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-11-21 00:59:49,370 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 48 [2021-11-21 00:59:49,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:59:49,370 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-11-21 00:59:49,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:49,371 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-11-21 00:59:49,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-21 00:59:49,373 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:59:49,373 INFO L514 BasicCegarLoop]: trace histogram [46, 8, 7, 7, 1, 1, 1, 1] [2021-11-21 00:59:49,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 00:59:49,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:59:49,594 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:59:49,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:59:49,595 INFO L85 PathProgramCache]: Analyzing trace with hash -378001954, now seen corresponding path program 7 times [2021-11-21 00:59:49,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:59:49,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368010426] [2021-11-21 00:59:49,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:49,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:59:49,605 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:59:49,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108494462] [2021-11-21 00:59:49,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:59:49,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:59:49,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:59:49,607 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:59:49,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 00:59:49,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:59:49,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-21 00:59:49,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:59:51,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 00:59:51,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:59:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 00:59:55,435 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:59:55,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368010426] [2021-11-21 00:59:55,436 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:59:55,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108494462] [2021-11-21 00:59:55,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108494462] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:59:55,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [477690400] [2021-11-21 00:59:55,438 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 00:59:55,439 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:59:55,439 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:59:55,439 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:59:55,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:59:55,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:55,504 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:59:55,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 00:59:55,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:55,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-21 00:59:55,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:55,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:55,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:55,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:55,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 162 [2021-11-21 00:59:55,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:55,717 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 45 treesize of output 28 [2021-11-21 00:59:55,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:55,734 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 54 treesize of output 33 [2021-11-21 00:59:55,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:55,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:55,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:55,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:55,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:55,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:55,862 INFO L354 Elim1Store]: treesize reduction 141, result has 13.5 percent of original size [2021-11-21 00:59:55,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 322 treesize of output 372 [2021-11-21 00:59:55,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:55,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:55,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:55,918 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-21 00:59:55,918 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 292 treesize of output 248 [2021-11-21 00:59:56,144 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:59:56,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:56,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:56,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:56,485 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-21 00:59:56,486 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 225 treesize of output 182 [2021-11-21 00:59:56,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:59:56,763 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 26 treesize of output 22 [2021-11-21 00:59:56,779 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:59:57,786 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:59:58,093 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:59:58,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:59:58,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 95 [2021-11-21 00:59:58,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749409909] [2021-11-21 00:59:58,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:59:58,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-21 00:59:58,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:59:58,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-21 00:59:58,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4576, Invalid=5524, Unknown=0, NotChecked=0, Total=10100 [2021-11-21 00:59:58,102 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:58,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:59:58,412 INFO L93 Difference]: Finished difference Result 146 states and 195 transitions. [2021-11-21 00:59:58,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-21 00:59:58,413 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 0 states have call successors, (0), 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 72 [2021-11-21 00:59:58,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:59:58,415 INFO L225 Difference]: With dead ends: 146 [2021-11-21 00:59:58,415 INFO L226 Difference]: Without dead ends: 121 [2021-11-21 00:59:58,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=4576, Invalid=5524, Unknown=0, NotChecked=0, Total=10100 [2021-11-21 00:59:58,419 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:59:58,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 21 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:59:58,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-21 00:59:58,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-11-21 00:59:58,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:58,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2021-11-21 00:59:58,441 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 72 [2021-11-21 00:59:58,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:59:58,442 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2021-11-21 00:59:58,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:58,442 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2021-11-21 00:59:58,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-21 00:59:58,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:59:58,445 INFO L514 BasicCegarLoop]: trace histogram [94, 8, 7, 7, 1, 1, 1, 1] [2021-11-21 00:59:58,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:59:58,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:59:58,658 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:59:58,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:59:58,658 INFO L85 PathProgramCache]: Analyzing trace with hash 504538846, now seen corresponding path program 8 times [2021-11-21 00:59:58,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:59:58,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104164209] [2021-11-21 00:59:58,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:58,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:59:58,684 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:59:58,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995659052] [2021-11-21 00:59:58,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:59:58,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:59:58,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:59:58,690 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:59:58,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:00:00,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-21 01:00:00,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:00:00,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 01:00:00,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:02,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:00:02,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 67 [2021-11-21 01:00:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4542 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2021-11-21 01:00:02,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:06,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:00:06,363 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 269 treesize of output 541 [2021-11-21 01:00:16,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4542 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2021-11-21 01:00:16,131 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:16,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104164209] [2021-11-21 01:00:16,131 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:00:16,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995659052] [2021-11-21 01:00:16,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995659052] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:00:16,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1528668368] [2021-11-21 01:00:16,134 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:00:16,134 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:00:16,135 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:00:16,135 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:00:16,135 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:00:16,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:16,177 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:00:16,178 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 01:00:16,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:16,209 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 01:00:16,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:16,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:16,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:16,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:16,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 162 [2021-11-21 01:00:16,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:16,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 26 [2021-11-21 01:00:16,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:16,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 24 [2021-11-21 01:00:16,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:16,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:16,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:16,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:16,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:16,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:16,545 INFO L354 Elim1Store]: treesize reduction 141, result has 13.5 percent of original size [2021-11-21 01:00:16,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 322 treesize of output 372 [2021-11-21 01:00:16,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:16,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:16,626 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 103 treesize of output 59 [2021-11-21 01:00:16,660 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:00:16,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:16,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:16,829 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 89 treesize of output 54 [2021-11-21 01:00:17,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:17,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:17,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:17,604 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-21 01:00:17,605 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 283 treesize of output 232 [2021-11-21 01:00:17,860 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:00:17,870 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 26 treesize of output 22 [2021-11-21 01:00:17,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:00:18,908 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:00:19,141 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:00:19,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:00:19,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-11-21 01:00:19,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587775698] [2021-11-21 01:00:19,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:00:19,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-21 01:00:19,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:19,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-21 01:00:19,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2021-11-21 01:00:19,143 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:21,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:21,692 INFO L93 Difference]: Finished difference Result 147 states and 155 transitions. [2021-11-21 01:00:21,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-21 01:00:21,692 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-11-21 01:00:21,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:21,694 INFO L225 Difference]: With dead ends: 147 [2021-11-21 01:00:21,694 INFO L226 Difference]: Without dead ends: 145 [2021-11-21 01:00:21,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 333 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=614, Invalid=1366, Unknown=0, NotChecked=0, Total=1980 [2021-11-21 01:00:21,696 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:21,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 22 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 23 Unchecked, 0.0s Time] [2021-11-21 01:00:21,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-21 01:00:21,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-21 01:00:21,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 0 states have call successors, (0), 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 01:00:21,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2021-11-21 01:00:21,721 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 120 [2021-11-21 01:00:21,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:21,722 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2021-11-21 01:00:21,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:21,723 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2021-11-21 01:00:21,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-21 01:00:21,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:21,725 INFO L514 BasicCegarLoop]: trace histogram [94, 16, 15, 15, 1, 1, 1, 1] [2021-11-21 01:00:21,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-21 01:00:21,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 01:00:21,935 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:21,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:21,935 INFO L85 PathProgramCache]: Analyzing trace with hash 809638622, now seen corresponding path program 9 times [2021-11-21 01:00:21,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:21,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86153099] [2021-11-21 01:00:21,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:21,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:21,948 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:00:21,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1334871240] [2021-11-21 01:00:21,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:00:21,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:21,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:00:21,950 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:00:21,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:00:22,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:00:22,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:00:22,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-21 01:00:22,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4810 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-11-21 01:00:26,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:34,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4810 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-11-21 01:01:34,113 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:01:34,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86153099] [2021-11-21 01:01:34,114 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:01:34,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334871240] [2021-11-21 01:01:34,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334871240] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:01:34,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [983360411] [2021-11-21 01:01:34,116 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:01:34,116 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:01:34,116 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:01:34,116 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:01:34,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:01:34,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:34,175 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:01:34,175 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 01:01:34,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:34,204 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 01:01:34,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:34,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:34,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:34,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:34,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 162 [2021-11-21 01:01:34,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:34,362 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 65 treesize of output 40 [2021-11-21 01:01:34,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:34,374 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 48 treesize of output 27 [2021-11-21 01:01:34,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:34,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:34,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:34,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:34,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:34,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:34,488 INFO L354 Elim1Store]: treesize reduction 141, result has 13.5 percent of original size [2021-11-21 01:01:34,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 322 treesize of output 372 [2021-11-21 01:01:34,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:34,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:34,524 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 66 treesize of output 40 [2021-11-21 01:01:34,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:34,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:34,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:34,565 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-21 01:01:34,566 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 273 treesize of output 239 [2021-11-21 01:01:34,878 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:01:34,887 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 26 treesize of output 22 [2021-11-21 01:01:34,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:01:36,004 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:01:36,466 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:01:36,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:01:36,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 191 [2021-11-21 01:01:36,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879861085] [2021-11-21 01:01:36,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:01:36,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-11-21 01:01:36,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:01:36,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-11-21 01:01:36,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18352, Invalid=20260, Unknown=0, NotChecked=0, Total=38612 [2021-11-21 01:01:36,480 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 192 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 191 states have internal predecessors, (197), 0 states have call successors, (0), 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 01:01:37,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:37,135 INFO L93 Difference]: Finished difference Result 290 states and 387 transitions. [2021-11-21 01:01:37,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-21 01:01:37,138 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 191 states have internal predecessors, (197), 0 states have call successors, (0), 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 144 [2021-11-21 01:01:37,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:37,140 INFO L225 Difference]: With dead ends: 290 [2021-11-21 01:01:37,141 INFO L226 Difference]: Without dead ends: 241 [2021-11-21 01:01:37,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 71.1s TimeCoverageRelationStatistics Valid=18352, Invalid=20260, Unknown=0, NotChecked=0, Total=38612 [2021-11-21 01:01:37,146 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:37,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:01:37,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-21 01:01:37,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2021-11-21 01:01:37,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.0083333333333333) internal successors, (242), 240 states have internal predecessors, (242), 0 states have call successors, (0), 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 01:01:37,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2021-11-21 01:01:37,197 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 144 [2021-11-21 01:01:37,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:37,198 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2021-11-21 01:01:37,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 191 states have internal predecessors, (197), 0 states have call successors, (0), 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 01:01:37,199 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2021-11-21 01:01:37,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-21 01:01:37,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:37,203 INFO L514 BasicCegarLoop]: trace histogram [190, 16, 15, 15, 1, 1, 1, 1] [2021-11-21 01:01:37,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:37,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-21 01:01:37,406 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:37,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:37,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1960778974, now seen corresponding path program 10 times [2021-11-21 01:01:37,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:01:37,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975766799] [2021-11-21 01:01:37,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:37,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:01:37,433 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:01:37,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [935700361] [2021-11-21 01:01:37,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:01:37,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:01:37,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:01:37,434 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:01:37,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f32558-e5d9-4bf0-be6e-8400cc97d72a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 01:01:37,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:37,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 193 conjunts are in the unsatisfiable core [2021-11-21 01:01:37,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:52,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18490 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-11-21 01:01:52,150 INFO L328 TraceCheckSpWp]: Computing backward predicates...