./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7 --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 599bde24b734dff8bcd3a53946a1033ced468fb55cf924fdefecd161d0c1af79 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:21:06,652 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:21:06,654 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:21:06,686 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:21:06,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:21:06,688 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:21:06,689 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:21:06,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:21:06,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:21:06,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:21:06,697 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:21:06,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:21:06,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:21:06,700 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:21:06,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:21:06,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:21:06,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:21:06,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:21:06,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:21:06,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:21:06,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:21:06,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:21:06,717 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:21:06,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:21:06,722 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:21:06,723 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:21:06,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:21:06,725 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:21:06,725 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:21:06,727 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:21:06,727 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:21:06,728 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:21:06,729 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:21:06,730 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:21:06,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:21:06,732 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:21:06,733 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:21:06,734 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:21:06,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:21:06,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:21:06,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:21:06,737 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:21:06,763 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:21:06,763 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:21:06,764 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:21:06,764 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:21:06,765 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:21:06,765 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:21:06,765 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:21:06,766 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:21:06,766 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:21:06,766 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:21:06,766 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:21:06,767 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:21:06,767 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:21:06,767 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:21:06,768 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:21:06,768 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:21:06,768 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:21:06,769 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:21:06,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:21:06,770 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:21:06,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:21:06,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:21:06,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:21:06,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:21:06,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:21:06,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:21:06,772 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:21:06,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:21:06,772 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:21:06,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:21:06,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:21:06,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:21:06,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:21:06,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:21:06,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:21:06,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:21:06,774 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:21:06,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:21:06,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:21:06,775 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:21:06,775 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:21:06,775 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_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 599bde24b734dff8bcd3a53946a1033ced468fb55cf924fdefecd161d0c1af79 [2021-11-25 18:21:07,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:21:07,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:21:07,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:21:07,043 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:21:07,043 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:21:07,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c [2021-11-25 18:21:07,150 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/data/14ec3fba0/097647089c654c4fb94b5590bb8ebb0c/FLAG50be3e747 [2021-11-25 18:21:07,662 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:21:07,662 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c [2021-11-25 18:21:07,667 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/data/14ec3fba0/097647089c654c4fb94b5590bb8ebb0c/FLAG50be3e747 [2021-11-25 18:21:08,045 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/data/14ec3fba0/097647089c654c4fb94b5590bb8ebb0c [2021-11-25 18:21:08,048 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:21:08,049 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:21:08,052 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:21:08,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:21:08,056 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:21:08,057 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:21:08" (1/1) ... [2021-11-25 18:21:08,058 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12260112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:08, skipping insertion in model container [2021-11-25 18:21:08,058 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:21:08" (1/1) ... [2021-11-25 18:21:08,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:21:08,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:21:08,258 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_21c11d7c-2d8c-457b-bb8a-e85f18958595/sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c[420,433] [2021-11-25 18:21:08,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:21:08,277 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:21:08,287 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_21c11d7c-2d8c-457b-bb8a-e85f18958595/sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c[420,433] [2021-11-25 18:21:08,292 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:21:08,302 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:21:08,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:08 WrapperNode [2021-11-25 18:21:08,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:21:08,304 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:21:08,304 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:21:08,304 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:21:08,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:08" (1/1) ... [2021-11-25 18:21:08,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:08" (1/1) ... [2021-11-25 18:21:08,335 INFO L137 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2021-11-25 18:21:08,335 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:21:08,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:21:08,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:21:08,336 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:21:08,344 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:08" (1/1) ... [2021-11-25 18:21:08,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:08" (1/1) ... [2021-11-25 18:21:08,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:08" (1/1) ... [2021-11-25 18:21:08,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:08" (1/1) ... [2021-11-25 18:21:08,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:08" (1/1) ... [2021-11-25 18:21:08,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:08" (1/1) ... [2021-11-25 18:21:08,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:08" (1/1) ... [2021-11-25 18:21:08,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:21:08,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:21:08,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:21:08,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:21:08,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:08" (1/1) ... [2021-11-25 18:21:08,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:21:08,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:21:08,416 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:21:08,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:21:08,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:21:08,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:21:08,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:21:08,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:21:08,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:21:08,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:21:08,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:21:08,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:21:08,516 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:21:08,518 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:21:08,623 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:21:08,648 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:21:08,649 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 18:21:08,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:21:08 BoogieIcfgContainer [2021-11-25 18:21:08,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:21:08,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:21:08,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:21:08,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:21:08,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:21:08" (1/3) ... [2021-11-25 18:21:08,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b25abcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:21:08, skipping insertion in model container [2021-11-25 18:21:08,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:08" (2/3) ... [2021-11-25 18:21:08,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b25abcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:21:08, skipping insertion in model container [2021-11-25 18:21:08,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:21:08" (3/3) ... [2021-11-25 18:21:08,660 INFO L111 eAbstractionObserver]: Analyzing ICFG array_tripl_access_init_const.c [2021-11-25 18:21:08,665 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:21:08,665 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:21:08,716 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:21:08,723 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 [2021-11-25 18:21:08,724 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:21:08,748 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) [2021-11-25 18:21:08,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 18:21:08,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:21:08,754 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 18:21:08,754 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:21:08,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:21:08,772 INFO L85 PathProgramCache]: Analyzing trace with hash 72684179, now seen corresponding path program 1 times [2021-11-25 18:21:08,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:21:08,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564308551] [2021-11-25 18:21:08,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:21:08,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:21:08,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:21:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:21:09,054 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:21:09,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564308551] [2021-11-25 18:21:09,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564308551] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:21:09,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:21:09,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:21:09,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205801164] [2021-11-25 18:21:09,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:21:09,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:21:09,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:21:09,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:21:09,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:21:09,114 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) [2021-11-25 18:21:09,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:21:09,169 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2021-11-25 18:21:09,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:21:09,172 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 [2021-11-25 18:21:09,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:21:09,180 INFO L225 Difference]: With dead ends: 15 [2021-11-25 18:21:09,181 INFO L226 Difference]: Without dead ends: 8 [2021-11-25 18:21:09,184 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 [2021-11-25 18:21:09,198 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:21:09,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:21:09,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-25 18:21:09,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-25 18:21:09,239 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) [2021-11-25 18:21:09,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-11-25 18:21:09,241 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2021-11-25 18:21:09,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:21:09,242 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-11-25 18:21:09,242 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) [2021-11-25 18:21:09,242 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-11-25 18:21:09,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 18:21:09,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:21:09,244 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 18:21:09,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:21:09,245 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:21:09,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:21:09,252 INFO L85 PathProgramCache]: Analyzing trace with hash -2045544120, now seen corresponding path program 1 times [2021-11-25 18:21:09,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:21:09,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661874722] [2021-11-25 18:21:09,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:21:09,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:21:09,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:21:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:21:09,389 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:21:09,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661874722] [2021-11-25 18:21:09,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661874722] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:21:09,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007045550] [2021-11-25 18:21:09,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:21:09,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:21:09,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:21:09,400 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:21:09,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:21:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:21:09,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:21:09,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:21:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:21:09,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:21:09,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:21:09,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007045550] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:21:09,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1467202061] [2021-11-25 18:21:09,691 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 18:21:09,691 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:21:09,696 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:21:09,702 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:21:09,703 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:21:09,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:09,845 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:21:09,846 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 [2021-11-25 18:21:09,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:09,869 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 26 treesize of output 34 [2021-11-25 18:21:09,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:09,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:09,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:09,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:09,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 46 [2021-11-25 18:21:10,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:10,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:10,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:10,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:10,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:10,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:10,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:10,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:10,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:10,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:10,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:10,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:10,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:10,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:10,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:10,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:10,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:10,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:10,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:10,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:10,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:21:10,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:10,209 INFO L354 Elim1Store]: treesize reduction 114, result has 30.9 percent of original size [2021-11-25 18:21:10,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 19 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 257 treesize of output 286 [2021-11-25 18:21:10,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:10,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:10,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:10,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2021-11-25 18:21:10,504 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:21:10,654 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '82#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= 100000 |ULTIMATE.start_main_~N~0#1|) (= |#NULL.base| 0))' at error location [2021-11-25 18:21:10,654 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:21:10,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:21:10,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2021-11-25 18:21:10,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387233924] [2021-11-25 18:21:10,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:21:10,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:21:10,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:21:10,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:21:10,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:21:10,660 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:21:10,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:21:10,690 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2021-11-25 18:21:10,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:21:10,691 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 18:21:10,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:21:10,692 INFO L225 Difference]: With dead ends: 16 [2021-11-25 18:21:10,692 INFO L226 Difference]: Without dead ends: 11 [2021-11-25 18:21:10,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:21:10,696 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:21:10,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:21:10,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-25 18:21:10,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-25 18:21:10,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:21:10,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-25 18:21:10,712 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2021-11-25 18:21:10,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:21:10,713 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-25 18:21:10,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:21:10,713 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-25 18:21:10,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:21:10,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:21:10,714 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2021-11-25 18:21:10,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:21:10,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:21:10,930 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:21:10,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:21:10,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1273784365, now seen corresponding path program 2 times [2021-11-25 18:21:10,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:21:10,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277063815] [2021-11-25 18:21:10,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:21:10,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:21:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:21:11,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:21:11,071 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:21:11,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277063815] [2021-11-25 18:21:11,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277063815] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:21:11,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368844999] [2021-11-25 18:21:11,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:21:11,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:21:11,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:21:11,075 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:21:11,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:21:11,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:21:11,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:21:11,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:21:11,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:21:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:21:11,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:21:11,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:21:11,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368844999] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:21:11,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1774506631] [2021-11-25 18:21:11,313 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 18:21:11,313 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:21:11,314 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:21:11,314 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:21:11,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:21:11,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,366 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-11-25 18:21:11,367 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 26 treesize of output 42 [2021-11-25 18:21:11,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,421 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:21:11,422 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 [2021-11-25 18:21:11,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 46 [2021-11-25 18:21:11,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:21:11,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:11,663 INFO L354 Elim1Store]: treesize reduction 114, result has 30.9 percent of original size [2021-11-25 18:21:11,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 257 treesize of output 286 [2021-11-25 18:21:12,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:12,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:12,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:12,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2021-11-25 18:21:12,055 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:21:12,180 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '191#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= 100000 |ULTIMATE.start_main_~N~0#1|) (= |#NULL.base| 0))' at error location [2021-11-25 18:21:12,180 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:21:12,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:21:12,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2021-11-25 18:21:12,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710429886] [2021-11-25 18:21:12,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:21:12,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 18:21:12,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:21:12,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 18:21:12,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=231, Unknown=0, NotChecked=0, Total=420 [2021-11-25 18:21:12,183 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:21:12,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:21:12,228 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2021-11-25 18:21:12,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:21:12,228 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 18:21:12,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:21:12,229 INFO L225 Difference]: With dead ends: 22 [2021-11-25 18:21:12,229 INFO L226 Difference]: Without dead ends: 17 [2021-11-25 18:21:12,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=231, Unknown=0, NotChecked=0, Total=420 [2021-11-25 18:21:12,231 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:21:12,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:21:12,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-25 18:21:12,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-25 18:21:12,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:21:12,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-25 18:21:12,235 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2021-11-25 18:21:12,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:21:12,236 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-25 18:21:12,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:21:12,236 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-25 18:21:12,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 18:21:12,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:21:12,237 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2021-11-25 18:21:12,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:21:12,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:21:12,451 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:21:12,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:21:12,452 INFO L85 PathProgramCache]: Analyzing trace with hash 904508339, now seen corresponding path program 3 times [2021-11-25 18:21:12,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:21:12,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602634345] [2021-11-25 18:21:12,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:21:12,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:21:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:21:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:21:12,674 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:21:12,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602634345] [2021-11-25 18:21:12,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602634345] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:21:12,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904421050] [2021-11-25 18:21:12,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:21:12,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:21:12,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:21:12,676 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:21:12,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:21:12,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:21:12,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:21:12,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 18:21:12,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:21:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:21:12,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:21:13,185 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:21:13,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904421050] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:21:13,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [500589752] [2021-11-25 18:21:13,188 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 18:21:13,188 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:21:13,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:21:13,188 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:21:13,188 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:21:13,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,235 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-11-25 18:21:13,235 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 26 treesize of output 42 [2021-11-25 18:21:13,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,282 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:21:13,283 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 [2021-11-25 18:21:13,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 46 [2021-11-25 18:21:13,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:21:13,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,459 INFO L354 Elim1Store]: treesize reduction 114, result has 30.9 percent of original size [2021-11-25 18:21:13,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 257 treesize of output 286 [2021-11-25 18:21:13,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:13,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2021-11-25 18:21:13,701 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:21:13,813 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '378#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= 100000 |ULTIMATE.start_main_~N~0#1|) (= |#NULL.base| 0))' at error location [2021-11-25 18:21:13,813 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:21:13,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:21:13,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2021-11-25 18:21:13,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215616752] [2021-11-25 18:21:13,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:21:13,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-25 18:21:13,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:21:13,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-25 18:21:13,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=663, Invalid=819, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 18:21:13,816 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:21:13,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:21:13,887 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2021-11-25 18:21:13,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 18:21:13,889 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-25 18:21:13,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:21:13,890 INFO L225 Difference]: With dead ends: 34 [2021-11-25 18:21:13,890 INFO L226 Difference]: Without dead ends: 29 [2021-11-25 18:21:13,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=663, Invalid=819, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 18:21:13,892 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:21:13,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:21:13,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-25 18:21:13,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-25 18:21:13,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:21:13,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-11-25 18:21:13,901 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 15 [2021-11-25 18:21:13,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:21:13,902 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-11-25 18:21:13,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:21:13,905 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-11-25 18:21:13,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 18:21:13,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:21:13,908 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2021-11-25 18:21:13,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:21:14,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:21:14,124 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:21:14,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:21:14,124 INFO L85 PathProgramCache]: Analyzing trace with hash 102675315, now seen corresponding path program 4 times [2021-11-25 18:21:14,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:21:14,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579008341] [2021-11-25 18:21:14,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:21:14,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:21:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:21:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:21:14,587 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:21:14,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579008341] [2021-11-25 18:21:14,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579008341] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:21:14,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667033122] [2021-11-25 18:21:14,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:21:14,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:21:14,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:21:14,589 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:21:14,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:21:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:21:14,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 18:21:14,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:21:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:21:15,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:21:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:21:15,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667033122] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:21:15,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2093494008] [2021-11-25 18:21:15,980 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 18:21:15,980 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:21:15,980 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:21:15,980 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:21:15,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:21:15,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,021 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:21:16,021 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 [2021-11-25 18:21:16,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,041 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 26 treesize of output 34 [2021-11-25 18:21:16,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 57 [2021-11-25 18:21:16,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,175 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 18:21:16,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 26 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 266 treesize of output 277 [2021-11-25 18:21:16,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:16,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2021-11-25 18:21:16,264 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:21:16,377 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '721#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= 100000 |ULTIMATE.start_main_~N~0#1|) (= |#NULL.base| 0))' at error location [2021-11-25 18:21:16,377 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:21:16,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:21:16,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 70 [2021-11-25 18:21:16,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543481823] [2021-11-25 18:21:16,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:21:16,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-25 18:21:16,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:21:16,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-25 18:21:16,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2475, Invalid=3075, Unknown=0, NotChecked=0, Total=5550 [2021-11-25 18:21:16,387 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 70 states have internal predecessors, (75), 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) [2021-11-25 18:21:16,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:21:16,522 INFO L93 Difference]: Finished difference Result 58 states and 83 transitions. [2021-11-25 18:21:16,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-25 18:21:16,523 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 70 states have internal predecessors, (75), 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 27 [2021-11-25 18:21:16,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:21:16,525 INFO L225 Difference]: With dead ends: 58 [2021-11-25 18:21:16,525 INFO L226 Difference]: Without dead ends: 53 [2021-11-25 18:21:16,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2567 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2475, Invalid=3075, Unknown=0, NotChecked=0, Total=5550 [2021-11-25 18:21:16,530 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:21:16,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:21:16,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-25 18:21:16,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-25 18:21:16,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 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) [2021-11-25 18:21:16,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-11-25 18:21:16,557 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 27 [2021-11-25 18:21:16,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:21:16,558 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-11-25 18:21:16,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 70 states have internal predecessors, (75), 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) [2021-11-25 18:21:16,558 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-11-25 18:21:16,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 18:21:16,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:21:16,560 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2021-11-25 18:21:16,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:21:16,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:21:16,788 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:21:16,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:21:16,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1127469811, now seen corresponding path program 5 times [2021-11-25 18:21:16,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:21:16,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743003563] [2021-11-25 18:21:16,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:21:16,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:21:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:21:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:21:17,985 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:21:17,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743003563] [2021-11-25 18:21:17,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743003563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:21:17,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746412203] [2021-11-25 18:21:17,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:21:17,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:21:17,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:21:17,986 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:21:18,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c11d7c-2d8c-457b-bb8a-e85f18958595/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process