./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum.i --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_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/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_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/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_913664aa-0858-4634-93ac-8fd635a0fe83/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 4dc91bf2fc8981aab63c1ee768384f1c8f580edfe4618d65089a78f799b6ddb8 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:16:23,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:16:23,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:16:23,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:16:23,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:16:23,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:16:23,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:16:23,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:16:23,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:16:23,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:16:23,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:16:23,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:16:23,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:16:23,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:16:23,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:16:23,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:16:23,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:16:23,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:16:23,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:16:23,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:16:23,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:16:23,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:16:23,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:16:23,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:16:23,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:16:23,554 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:16:23,555 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:16:23,556 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:16:23,556 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:16:23,558 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:16:23,558 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:16:23,559 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:16:23,560 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:16:23,561 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:16:23,562 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:16:23,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:16:23,564 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:16:23,564 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:16:23,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:16:23,566 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:16:23,567 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:16:23,568 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:16:23,593 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:16:23,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:16:23,594 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:16:23,594 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:16:23,595 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:16:23,595 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:16:23,595 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:16:23,596 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:16:23,596 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:16:23,596 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:16:23,596 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:16:23,597 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:16:23,597 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:16:23,597 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:16:23,598 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:16:23,598 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:16:23,598 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:16:23,598 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:16:23,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:16:23,599 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:16:23,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:16:23,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:16:23,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:16:23,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:16:23,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:16:23,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:16:23,601 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:16:23,602 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:16:23,602 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:16:23,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:16:23,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:16:23,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:16:23,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:16:23,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:16:23,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:16:23,603 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:16:23,604 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:16:23,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:16:23,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:16:23,604 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:16:23,605 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:16:23,605 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_913664aa-0858-4634-93ac-8fd635a0fe83/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4dc91bf2fc8981aab63c1ee768384f1c8f580edfe4618d65089a78f799b6ddb8 [2021-11-25 20:16:23,873 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:16:23,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:16:23,895 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:16:23,896 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:16:23,897 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:16:23,898 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/reducercommutativity/rangesum.i [2021-11-25 20:16:23,977 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/data/05225d8ab/e79419c10ccf41abae88743efd4ff534/FLAG40b0cf880 [2021-11-25 20:16:24,442 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:16:24,442 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/sv-benchmarks/c/reducercommutativity/rangesum.i [2021-11-25 20:16:24,448 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/data/05225d8ab/e79419c10ccf41abae88743efd4ff534/FLAG40b0cf880 [2021-11-25 20:16:24,827 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/data/05225d8ab/e79419c10ccf41abae88743efd4ff534 [2021-11-25 20:16:24,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:16:24,832 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:16:24,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:16:24,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:16:24,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:16:24,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:16:24" (1/1) ... [2021-11-25 20:16:24,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78c8ecc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:16:24, skipping insertion in model container [2021-11-25 20:16:24,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:16:24" (1/1) ... [2021-11-25 20:16:24,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:16:24,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:16:25,075 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_913664aa-0858-4634-93ac-8fd635a0fe83/sv-benchmarks/c/reducercommutativity/rangesum.i[1544,1557] [2021-11-25 20:16:25,078 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:16:25,085 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:16:25,107 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_913664aa-0858-4634-93ac-8fd635a0fe83/sv-benchmarks/c/reducercommutativity/rangesum.i[1544,1557] [2021-11-25 20:16:25,108 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:16:25,122 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:16:25,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:16:25 WrapperNode [2021-11-25 20:16:25,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:16:25,124 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:16:25,124 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:16:25,124 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:16:25,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:16:25" (1/1) ... [2021-11-25 20:16:25,138 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:16:25" (1/1) ... [2021-11-25 20:16:25,157 INFO L137 Inliner]: procedures = 17, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 73 [2021-11-25 20:16:25,158 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:16:25,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:16:25,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:16:25,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:16:25,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:16:25" (1/1) ... [2021-11-25 20:16:25,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:16:25" (1/1) ... [2021-11-25 20:16:25,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:16:25" (1/1) ... [2021-11-25 20:16:25,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:16:25" (1/1) ... [2021-11-25 20:16:25,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:16:25" (1/1) ... [2021-11-25 20:16:25,181 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:16:25" (1/1) ... [2021-11-25 20:16:25,183 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:16:25" (1/1) ... [2021-11-25 20:16:25,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:16:25,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:16:25,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:16:25,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:16:25,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:16:25" (1/1) ... [2021-11-25 20:16:25,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:16:25,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:16:25,245 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:16:25,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:16:25,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:16:25,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:16:25,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:16:25,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:16:25,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:16:25,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:16:25,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:16:25,297 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2021-11-25 20:16:25,297 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2021-11-25 20:16:25,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:16:25,357 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:16:25,358 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:16:25,508 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:16:25,549 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:16:25,549 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-25 20:16:25,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:16:25 BoogieIcfgContainer [2021-11-25 20:16:25,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:16:25,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:16:25,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:16:25,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:16:25,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:16:24" (1/3) ... [2021-11-25 20:16:25,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc40d8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:16:25, skipping insertion in model container [2021-11-25 20:16:25,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:16:25" (2/3) ... [2021-11-25 20:16:25,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc40d8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:16:25, skipping insertion in model container [2021-11-25 20:16:25,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:16:25" (3/3) ... [2021-11-25 20:16:25,559 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum.i [2021-11-25 20:16:25,564 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:16:25,565 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:16:25,611 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:16:25,619 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 20:16:25,619 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:16:25,635 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 20:16:25,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 20:16:25,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:16:25,641 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:16:25,642 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:16:25,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:16:25,647 INFO L85 PathProgramCache]: Analyzing trace with hash 890449984, now seen corresponding path program 1 times [2021-11-25 20:16:25,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:16:25,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571931890] [2021-11-25 20:16:25,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:16:25,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:16:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:16:25,852 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:16:25,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571931890] [2021-11-25 20:16:25,853 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-25 20:16:25,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651105895] [2021-11-25 20:16:25,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:16:25,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:25,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:16:25,856 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:16:25,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:16:25,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:16:25,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:16:25,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:16:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:16:26,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:16:26,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651105895] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:16:26,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:16:26,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:16:26,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998986415] [2021-11-25 20:16:26,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:16:26,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:16:26,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:16:26,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:16:26,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:16:26,142 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:16:26,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:16:26,185 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-11-25 20:16:26,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:16:26,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2021-11-25 20:16:26,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:16:26,194 INFO L225 Difference]: With dead ends: 36 [2021-11-25 20:16:26,195 INFO L226 Difference]: Without dead ends: 17 [2021-11-25 20:16:26,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 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 20:16:26,202 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:16:26,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:16:26,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-25 20:16:26,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-25 20:16:26,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 20:16:26,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-25 20:16:26,239 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2021-11-25 20:16:26,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:16:26,240 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-25 20:16:26,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:16:26,240 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-25 20:16:26,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 20:16:26,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:16:26,243 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:16:26,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:16:26,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-25 20:16:26,468 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:16:26,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:16:26,473 INFO L85 PathProgramCache]: Analyzing trace with hash -857535421, now seen corresponding path program 1 times [2021-11-25 20:16:26,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:16:26,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166072592] [2021-11-25 20:16:26,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:16:26,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:16:26,508 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:16:26,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599093452] [2021-11-25 20:16:26,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:16:26,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:26,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:16:26,510 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:16:26,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:16:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:16:26,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:16:26,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:16:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:16:26,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:16:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:16:26,835 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:16:26,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166072592] [2021-11-25 20:16:26,839 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:16:26,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599093452] [2021-11-25 20:16:26,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599093452] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:16:26,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [468325757] [2021-11-25 20:16:26,873 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 20:16:26,875 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:16:26,881 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:16:26,893 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:16:26,893 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:16:27,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:27,034 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-25 20:16:27,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2021-11-25 20:16:27,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:27,075 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:16:27,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:16:27,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:27,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-25 20:16:27,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:27,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:27,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:27,389 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 20:16:27,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 230 treesize of output 218 [2021-11-25 20:16:27,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:16:27,594 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 17 for LOIs [2021-11-25 20:16:27,604 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:16:27,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [468325757] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:16:27,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:16:27,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 4] total 11 [2021-11-25 20:16:27,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056234147] [2021-11-25 20:16:27,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:16:27,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:16:27,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:16:27,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:16:27,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:16:27,792 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:16:28,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:16:28,002 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2021-11-25 20:16:28,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:16:28,004 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-11-25 20:16:28,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:16:28,004 INFO L225 Difference]: With dead ends: 30 [2021-11-25 20:16:28,004 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 20:16:28,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:16:28,007 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 11 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:16:28,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 12 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:16:28,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 20:16:28,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-25 20:16:28,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 20:16:28,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-25 20:16:28,017 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 22 [2021-11-25 20:16:28,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:16:28,018 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-25 20:16:28,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:16:28,019 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-25 20:16:28,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 20:16:28,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:16:28,020 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:16:28,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:16:28,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:28,236 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:16:28,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:16:28,237 INFO L85 PathProgramCache]: Analyzing trace with hash -235427948, now seen corresponding path program 1 times [2021-11-25 20:16:28,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:16:28,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241424430] [2021-11-25 20:16:28,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:16:28,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:16:28,262 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:16:28,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961210831] [2021-11-25 20:16:28,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:16:28,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:28,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:16:28,264 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:16:28,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:16:28,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:16:28,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:16:28,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:16:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 20:16:28,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:16:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 20:16:28,481 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:16:28,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241424430] [2021-11-25 20:16:28,482 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:16:28,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961210831] [2021-11-25 20:16:28,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961210831] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:16:28,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [971641888] [2021-11-25 20:16:28,486 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 20:16:28,486 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:16:28,487 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:16:28,487 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:16:28,487 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:16:28,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:28,533 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:16:28,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:16:28,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:28,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 24 [2021-11-25 20:16:28,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:28,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-25 20:16:28,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:28,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:28,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:28,685 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 20:16:28,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 230 treesize of output 218 [2021-11-25 20:16:28,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:16:29,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:29,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-25 20:16:29,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:16:29,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-25 20:16:29,848 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 17 for LOIs [2021-11-25 20:16:29,925 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:16:38,716 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '522#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= 1 |ULTIMATE.start_init_nondet_~i~0#1|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4) |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 1 ~N~0) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~i~2#1| 0) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= ~N~0 1) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:16:38,716 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:16:38,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:16:38,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-25 20:16:38,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932966740] [2021-11-25 20:16:38,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:16:38,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:16:38,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:16:38,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:16:38,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=306, Unknown=1, NotChecked=0, Total=380 [2021-11-25 20:16:38,719 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 20:16:38,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:16:38,755 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-11-25 20:16:38,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:16:38,757 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2021-11-25 20:16:38,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:16:38,758 INFO L225 Difference]: With dead ends: 33 [2021-11-25 20:16:38,758 INFO L226 Difference]: Without dead ends: 19 [2021-11-25 20:16:38,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=73, Invalid=306, Unknown=1, NotChecked=0, Total=380 [2021-11-25 20:16:38,760 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:16:38,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:16:38,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-25 20:16:38,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-25 20:16:38,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 20:16:38,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-25 20:16:38,766 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 25 [2021-11-25 20:16:38,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:16:38,767 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-25 20:16:38,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 20:16:38,767 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-25 20:16:38,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 20:16:38,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:16:38,768 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:16:38,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-25 20:16:38,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:38,997 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:16:38,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:16:38,997 INFO L85 PathProgramCache]: Analyzing trace with hash 648268311, now seen corresponding path program 2 times [2021-11-25 20:16:38,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:16:38,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813881231] [2021-11-25 20:16:38,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:16:38,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:16:39,026 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:16:39,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706219673] [2021-11-25 20:16:39,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:16:39,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:39,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:16:39,034 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:16:39,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:16:39,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 20:16:39,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:16:39,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:16:39,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:16:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:16:39,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:16:39,165 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:16:39,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813881231] [2021-11-25 20:16:39,165 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:16:39,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706219673] [2021-11-25 20:16:39,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706219673] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:16:39,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:16:39,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:16:39,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189284167] [2021-11-25 20:16:39,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:16:39,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:16:39,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:16:39,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:16:39,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:16:39,168 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:16:39,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:16:39,196 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2021-11-25 20:16:39,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:16:39,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-11-25 20:16:39,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:16:39,197 INFO L225 Difference]: With dead ends: 29 [2021-11-25 20:16:39,197 INFO L226 Difference]: Without dead ends: 20 [2021-11-25 20:16:39,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:16:39,199 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:16:39,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 18 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:16:39,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-25 20:16:39,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-25 20:16:39,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 20:16:39,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-11-25 20:16:39,205 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 26 [2021-11-25 20:16:39,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:16:39,206 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-11-25 20:16:39,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:16:39,207 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-11-25 20:16:39,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 20:16:39,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:16:39,208 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:16:39,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:16:39,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-25 20:16:39,428 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:16:39,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:16:39,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1533229909, now seen corresponding path program 1 times [2021-11-25 20:16:39,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:16:39,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298493906] [2021-11-25 20:16:39,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:16:39,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:16:39,481 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:16:39,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760795397] [2021-11-25 20:16:39,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:16:39,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:39,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:16:39,485 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:16:39,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:16:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:16:39,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:16:39,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:16:39,622 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 20:16:39,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:16:39,712 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 20:16:39,713 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:16:39,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298493906] [2021-11-25 20:16:39,713 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:16:39,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760795397] [2021-11-25 20:16:39,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760795397] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:16:39,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1125195361] [2021-11-25 20:16:39,716 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 20:16:39,716 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:16:39,716 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:16:39,717 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:16:39,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:16:39,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:39,751 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-25 20:16:39,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2021-11-25 20:16:39,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:39,774 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:16:39,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:16:39,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:39,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 20:16:39,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:39,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:16:39,888 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-25 20:16:39,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 220 treesize of output 219 [2021-11-25 20:16:40,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:16:40,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:40,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-25 20:16:40,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:40,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:40,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:16:40,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-25 20:16:40,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:40,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:40,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:40,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:40,681 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 20:16:40,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-25 20:16:40,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:40,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-25 20:16:40,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:16:41,116 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 17 for LOIs [2021-11-25 20:16:41,183 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:16:47,960 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '933#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= 1 |ULTIMATE.start_init_nondet_~i~0#1|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= ~N~0 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4) |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_13 Int)) (and (or (and (= v_rangesum_~cnt~0_BEFORE_RETURN_13 0) (= |ULTIMATE.start_main_~ret5~0#1| 0)) (and (not (= v_rangesum_~cnt~0_BEFORE_RETURN_13 0)) (exists ((v_rangesum_~ret~0_BEFORE_RETURN_13 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_13 v_rangesum_~cnt~0_BEFORE_RETURN_13) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_13 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_13 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_13 v_rangesum_~cnt~0_BEFORE_RETURN_13)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_13 v_rangesum_~cnt~0_BEFORE_RETURN_13) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_13 v_rangesum_~cnt~0_BEFORE_RETURN_13)) 4294967296) 2147483647) (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_13 v_rangesum_~cnt~0_BEFORE_RETURN_13) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_13 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_13 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_13 v_rangesum_~cnt~0_BEFORE_RETURN_13)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_13 v_rangesum_~cnt~0_BEFORE_RETURN_13) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_13 v_rangesum_~cnt~0_BEFORE_RETURN_13)) 4294967296) (+ (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_13 v_rangesum_~cnt~0_BEFORE_RETURN_13) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_13 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_13 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_13 v_rangesum_~cnt~0_BEFORE_RETURN_13)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_13 v_rangesum_~cnt~0_BEFORE_RETURN_13) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_13 v_rangesum_~cnt~0_BEFORE_RETURN_13)) 4294967296) (- 4294967296))))))) (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_13))) (<= 1 ~N~0) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= ~N~0 (+ |ULTIMATE.start_main_~i~2#1| 1)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:16:47,960 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:16:47,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:16:47,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-11-25 20:16:47,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31379793] [2021-11-25 20:16:47,961 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:16:47,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:16:47,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:16:47,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:16:47,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-25 20:16:47,963 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 20:16:48,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:16:48,001 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2021-11-25 20:16:48,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:16:48,002 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 27 [2021-11-25 20:16:48,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:16:48,003 INFO L225 Difference]: With dead ends: 35 [2021-11-25 20:16:48,003 INFO L226 Difference]: Without dead ends: 21 [2021-11-25 20:16:48,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-25 20:16:48,005 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:16:48,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 19 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:16:48,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-25 20:16:48,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-25 20:16:48,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 20:16:48,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-25 20:16:48,011 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 27 [2021-11-25 20:16:48,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:16:48,012 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-25 20:16:48,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 20:16:48,012 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-25 20:16:48,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-25 20:16:48,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:16:48,014 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:16:48,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:16:48,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:48,228 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:16:48,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:16:48,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1502007822, now seen corresponding path program 2 times [2021-11-25 20:16:48,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:16:48,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414581092] [2021-11-25 20:16:48,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:16:48,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:16:48,253 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:16:48,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [292360144] [2021-11-25 20:16:48,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:16:48,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:48,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:16:48,255 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:16:48,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:16:48,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 20:16:48,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:16:48,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-25 20:16:48,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:16:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 20:16:49,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:16:50,485 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-25 20:16:50,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 79 [2021-11-25 20:17:08,896 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 20:17:08,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 427 treesize of output 320 [2021-11-25 20:17:49,076 WARN L227 SmtUtils]: Spent 31.94s on a formula simplification that was a NOOP. DAG size: 116 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:17:50,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:17:50,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2021-11-25 20:18:03,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2021-11-25 20:18:29,266 WARN L227 SmtUtils]: Spent 22.24s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:18:30,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:18:30,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 68 [2021-11-25 20:18:47,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:18:47,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 357 treesize of output 277 [2021-11-25 20:20:24,389 WARN L227 SmtUtils]: Spent 1.18m on a formula simplification. DAG size of input: 144 DAG size of output: 83 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:20:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 30 refuted. 1 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:20:25,319 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:25,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414581092] [2021-11-25 20:20:25,319 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:20:25,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292360144] [2021-11-25 20:20:25,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292360144] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:20:25,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2085988571] [2021-11-25 20:20:25,323 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 20:20:25,323 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:20:25,324 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:20:25,324 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:20:25,324 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:20:25,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:25,405 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-25 20:20:25,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2021-11-25 20:20:25,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:25,461 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:20:25,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:20:25,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:25,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 20:20:25,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:25,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:25,616 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-25 20:20:25,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 220 treesize of output 219 [2021-11-25 20:20:25,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:20:25,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:25,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-25 20:20:26,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:26,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-11-25 20:20:26,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:26,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:26,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:26,477 INFO L354 Elim1Store]: treesize reduction 60, result has 32.6 percent of original size [2021-11-25 20:20:26,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 88 [2021-11-25 20:20:26,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:26,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-25 20:20:26,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:20:26,847 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 17 for LOIs [2021-11-25 20:20:26,919 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:20:35,336 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1242#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= 1 |ULTIMATE.start_init_nondet_~i~0#1|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= ~N~0 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 1 ~N~0) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:20:35,337 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:20:35,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:20:35,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 34 [2021-11-25 20:20:35,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649948483] [2021-11-25 20:20:35,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:20:35,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-25 20:20:35,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:35,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-25 20:20:35,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1941, Unknown=5, NotChecked=0, Total=2162 [2021-11-25 20:20:35,341 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 34 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 29 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 20:27:03,503 WARN L227 SmtUtils]: Spent 6.41m on a formula simplification. DAG size of input: 245 DAG size of output: 204 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:27:14,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:27:14,171 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-11-25 20:27:14,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 20:27:14,172 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 29 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 30 [2021-11-25 20:27:14,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:27:14,174 INFO L225 Difference]: With dead ends: 40 [2021-11-25 20:27:14,174 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 20:27:14,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 563.3s TimeCoverageRelationStatistics Valid=341, Invalid=3074, Unknown=7, NotChecked=0, Total=3422 [2021-11-25 20:27:14,177 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:27:14,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 82 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 295 Invalid, 0 Unknown, 70 Unchecked, 2.1s Time] [2021-11-25 20:27:14,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 20:27:14,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-11-25 20:27:14,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 20:27:14,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-25 20:27:14,186 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 30 [2021-11-25 20:27:14,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:27:14,186 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-25 20:27:14,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 29 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 20:27:14,187 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-25 20:27:14,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-25 20:27:14,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:27:14,188 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:27:14,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:27:14,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:27:14,416 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:27:14,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:27:14,417 INFO L85 PathProgramCache]: Analyzing trace with hash 346737003, now seen corresponding path program 3 times [2021-11-25 20:27:14,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:27:14,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22354484] [2021-11-25 20:27:14,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:14,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:27:14,451 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:27:14,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702478290] [2021-11-25 20:27:14,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:27:14,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:27:14,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:27:14,463 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:27:14,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 20:27:14,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:27:14,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:27:14,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:27:14,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:27:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 20:27:14,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:27:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-25 20:27:14,872 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:27:14,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22354484] [2021-11-25 20:27:14,872 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:27:14,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702478290] [2021-11-25 20:27:14,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702478290] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:27:14,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [412555415] [2021-11-25 20:27:14,875 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 20:27:14,875 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:27:14,875 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:27:14,875 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:27:14,876 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:27:14,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:14,943 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:27:14,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:27:14,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:14,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 24 [2021-11-25 20:27:14,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:14,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-25 20:27:15,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:15,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:15,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:15,108 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 20:27:15,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 230 treesize of output 218 [2021-11-25 20:27:15,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:27:15,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:15,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-25 20:27:15,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:15,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:15,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:27:15,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-25 20:27:15,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:15,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:15,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:15,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:15,753 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 20:27:15,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-25 20:27:15,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:15,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-25 20:27:15,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:27:16,170 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 17 for LOIs [2021-11-25 20:27:16,235 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:27:23,950 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1567#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= 1 |ULTIMATE.start_init_nondet_~i~0#1|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= ~N~0 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4) |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 1 ~N~0) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= ~N~0 (+ |ULTIMATE.start_main_~i~2#1| 1)) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:27:23,950 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:27:23,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:27:23,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-25 20:27:23,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172363652] [2021-11-25 20:27:23,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:27:23,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 20:27:23,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:27:23,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 20:27:23,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-11-25 20:27:23,956 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 20:27:24,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:27:24,279 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-11-25 20:27:24,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:27:24,280 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 31 [2021-11-25 20:27:24,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:27:24,280 INFO L225 Difference]: With dead ends: 33 [2021-11-25 20:27:24,280 INFO L226 Difference]: Without dead ends: 23 [2021-11-25 20:27:24,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-11-25 20:27:24,282 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:27:24,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 38 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:27:24,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-25 20:27:24,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-25 20:27:24,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 20:27:24,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-25 20:27:24,289 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 31 [2021-11-25 20:27:24,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:27:24,289 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-25 20:27:24,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 20:27:24,290 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-25 20:27:24,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-25 20:27:24,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:27:24,291 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:27:24,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:27:24,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:27:24,492 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:27:24,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:27:24,492 INFO L85 PathProgramCache]: Analyzing trace with hash 221279939, now seen corresponding path program 4 times [2021-11-25 20:27:24,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:27:24,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758871894] [2021-11-25 20:27:24,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:24,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:27:24,532 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:27:24,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203788925] [2021-11-25 20:27:24,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:27:24,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:27:24,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:27:24,541 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:27:24,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 20:27:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:24,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:27:24,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:27:24,845 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 20:27:24,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:27:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 20:27:25,147 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:27:25,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758871894] [2021-11-25 20:27:25,147 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:27:25,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203788925] [2021-11-25 20:27:25,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203788925] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:27:25,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1663578889] [2021-11-25 20:27:25,149 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 20:27:25,150 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:27:25,150 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:27:25,150 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:27:25,151 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:27:25,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:25,222 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-25 20:27:25,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2021-11-25 20:27:25,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:25,283 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:27:25,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:27:25,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:25,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-25 20:27:25,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:25,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:25,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:25,436 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 20:27:25,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 230 treesize of output 218 [2021-11-25 20:27:25,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:27:25,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:25,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-25 20:27:26,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:26,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:26,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:27:26,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-25 20:27:26,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:26,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:26,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:26,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:26,143 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 20:27:26,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-25 20:27:26,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:26,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-25 20:27:26,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:27:26,611 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 17 for LOIs [2021-11-25 20:27:26,666 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:27:37,055 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1875#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_init_nondet_~i~0#1|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= ~N~0 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4) |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 1 ~N~0) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_31 Int)) (and (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_31) (or (and (exists ((v_rangesum_~ret~0_BEFORE_RETURN_31 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_31 v_rangesum_~cnt~0_BEFORE_RETURN_31) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_31 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_31 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_31 v_rangesum_~cnt~0_BEFORE_RETURN_31)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_31 v_rangesum_~cnt~0_BEFORE_RETURN_31) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_31 v_rangesum_~cnt~0_BEFORE_RETURN_31)) 4294967296) 2147483647) (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_31 v_rangesum_~cnt~0_BEFORE_RETURN_31) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_31 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_31 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_31 v_rangesum_~cnt~0_BEFORE_RETURN_31)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_31 v_rangesum_~cnt~0_BEFORE_RETURN_31) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_31 v_rangesum_~cnt~0_BEFORE_RETURN_31)) 4294967296) (+ (- 4294967296) (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_31 v_rangesum_~cnt~0_BEFORE_RETURN_31) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_31 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_31 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_31 v_rangesum_~cnt~0_BEFORE_RETURN_31)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_31 v_rangesum_~cnt~0_BEFORE_RETURN_31) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_31 v_rangesum_~cnt~0_BEFORE_RETURN_31)) 4294967296))))) (not (= v_rangesum_~cnt~0_BEFORE_RETURN_31 0))) (and (= v_rangesum_~cnt~0_BEFORE_RETURN_31 0) (= |ULTIMATE.start_main_~ret5~0#1| 0))))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= ~N~0 (+ |ULTIMATE.start_main_~i~2#1| 1)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 20:27:37,055 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:27:37,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:27:37,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2021-11-25 20:27:37,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367986073] [2021-11-25 20:27:37,055 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:27:37,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 20:27:37,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:27:37,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 20:27:37,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-11-25 20:27:37,056 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 20:27:37,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:27:37,225 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-11-25 20:27:37,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 20:27:37,226 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 32 [2021-11-25 20:27:37,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:27:37,226 INFO L225 Difference]: With dead ends: 40 [2021-11-25 20:27:37,226 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 20:27:37,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2021-11-25 20:27:37,228 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:27:37,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 29 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:27:37,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 20:27:37,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-25 20:27:37,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 20:27:37,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-25 20:27:37,235 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 32 [2021-11-25 20:27:37,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:27:37,235 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-25 20:27:37,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 20:27:37,236 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-25 20:27:37,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-25 20:27:37,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:27:37,237 INFO L514 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:27:37,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:27:37,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:27:37,440 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:27:37,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:27:37,441 INFO L85 PathProgramCache]: Analyzing trace with hash 795085204, now seen corresponding path program 5 times [2021-11-25 20:27:37,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:27:37,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921268059] [2021-11-25 20:27:37,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:37,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:27:37,469 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:27:37,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [436972066] [2021-11-25 20:27:37,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:27:37,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:27:37,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:27:37,472 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:27:37,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 20:27:37,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-25 20:27:37,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-11-25 20:27:37,609 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 20:27:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 20:27:37,706 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-25 20:27:37,707 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 20:27:37,708 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 20:27:37,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:27:37,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:27:37,939 INFO L732 BasicCegarLoop]: Path program histogram: [5, 2, 1, 1] [2021-11-25 20:27:37,941 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 20:27:37,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:27:37 BoogieIcfgContainer [2021-11-25 20:27:37,997 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 20:27:37,997 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 20:27:37,997 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 20:27:37,997 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 20:27:37,998 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:16:25" (3/4) ... [2021-11-25 20:27:37,999 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-25 20:27:38,067 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 20:27:38,067 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 20:27:38,068 INFO L158 Benchmark]: Toolchain (without parser) took 673235.91ms. Allocated memory was 102.8MB in the beginning and 127.9MB in the end (delta: 25.2MB). Free memory was 64.8MB in the beginning and 41.1MB in the end (delta: 23.8MB). Peak memory consumption was 49.2MB. Max. memory is 16.1GB. [2021-11-25 20:27:38,068 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 102.8MB. Free memory is still 81.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:27:38,069 INFO L158 Benchmark]: CACSL2BoogieTranslator took 289.01ms. Allocated memory is still 102.8MB. Free memory was 64.6MB in the beginning and 77.2MB in the end (delta: -12.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 20:27:38,069 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.13ms. Allocated memory is still 102.8MB. Free memory was 77.2MB in the beginning and 75.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:27:38,069 INFO L158 Benchmark]: Boogie Preprocessor took 26.84ms. Allocated memory is still 102.8MB. Free memory was 75.3MB in the beginning and 74.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:27:38,070 INFO L158 Benchmark]: RCFGBuilder took 365.83ms. Allocated memory is still 102.8MB. Free memory was 74.2MB in the beginning and 61.2MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 20:27:38,070 INFO L158 Benchmark]: TraceAbstraction took 672443.17ms. Allocated memory was 102.8MB in the beginning and 127.9MB in the end (delta: 25.2MB). Free memory was 60.7MB in the beginning and 45.3MB in the end (delta: 15.5MB). Peak memory consumption was 43.4MB. Max. memory is 16.1GB. [2021-11-25 20:27:38,071 INFO L158 Benchmark]: Witness Printer took 70.32ms. Allocated memory is still 127.9MB. Free memory was 45.3MB in the beginning and 41.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-25 20:27:38,072 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 102.8MB. Free memory is still 81.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 289.01ms. Allocated memory is still 102.8MB. Free memory was 64.6MB in the beginning and 77.2MB in the end (delta: -12.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.13ms. Allocated memory is still 102.8MB. Free memory was 77.2MB in the beginning and 75.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.84ms. Allocated memory is still 102.8MB. Free memory was 75.3MB in the beginning and 74.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 365.83ms. Allocated memory is still 102.8MB. Free memory was 74.2MB in the beginning and 61.2MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 672443.17ms. Allocated memory was 102.8MB in the beginning and 127.9MB in the end (delta: 25.2MB). Free memory was 60.7MB in the beginning and 45.3MB in the end (delta: 15.5MB). Peak memory consumption was 43.4MB. Max. memory is 16.1GB. * Witness Printer took 70.32ms. Allocated memory is still 127.9MB. Free memory was 45.3MB in the beginning and 41.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 64]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] int N; [L43] N = __VERIFIER_nondet_int() [L44] COND TRUE N > 1 [L45] int x[N]; [L46] CALL init_nondet(x) [L17] int i; [L18] i = 0 VAL [i=0, N=3, x={3:0}, x={3:0}] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [i=1, N=3, x={3:0}, x={3:0}] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [i=2, N=3, x={3:0}, x={3:0}] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [i=3, N=3, x={3:0}, x={3:0}] [L18] COND FALSE !(i < N) [L46] RET init_nondet(x) [L47] int temp; [L48] int ret; [L49] int ret2; [L50] int ret5; VAL [N=3, x={3:0}] [L52] CALL, EXPR rangesum(x) VAL [N=3, x={3:0}] [L25] int i; [L26] long long ret; [L27] ret = 0 [L28] int cnt = 0; [L29] i = 0 VAL [cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i < N [L30] COND FALSE !(i > N/2) [L29] i++ VAL [cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}, x[i]=21] [L29] COND TRUE i < N [L30] COND FALSE !(i > N/2) [L29] i++ VAL [cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}, x[i]=21] [L29] COND TRUE i < N [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 [L29] i++ VAL [cnt=1, i=3, N=3, ret=-1, x={3:0}, x={3:0}, x[i]=0] [L29] COND FALSE !(i < N) [L35] COND TRUE cnt !=0 [L36] return ret / cnt; [L52] RET, EXPR rangesum(x) VAL [N=3, rangesum(x)=-1, x={3:0}] [L52] ret = rangesum(x) [L54] EXPR x[0] [L54] temp=x[0] [L54] EXPR x[1] [L54] x[0] = x[1] [L54] x[1] = temp VAL [N=3, ret=-1, temp=2, x={3:0}] [L55] CALL, EXPR rangesum(x) VAL [N=3, x={3:0}] [L25] int i; [L26] long long ret; [L27] ret = 0 [L28] int cnt = 0; [L29] i = 0 VAL [cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i < N [L30] COND FALSE !(i > N/2) [L29] i++ VAL [cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}, x[i]=40] [L29] COND TRUE i < N [L30] COND FALSE !(i > N/2) [L29] i++ VAL [cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}, x[i]=40] [L29] COND TRUE i < N [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 [L29] i++ VAL [cnt=1, i=3, N=3, ret=-1, x={3:0}, x={3:0}, x[i]=0] [L29] COND FALSE !(i < N) [L35] COND TRUE cnt !=0 [L36] return ret / cnt; [L55] RET, EXPR rangesum(x) VAL [N=3, rangesum(x)=-1, ret=-1, temp=2, x={3:0}] [L55] ret2 = rangesum(x) [L56] EXPR x[0] [L56] temp=x[0] [L57] int i =0 ; VAL [i=0, N=3, ret=-1, ret2=-1, temp=1, x={3:0}] [L57] COND TRUE i N/2) [L29] i++ VAL [cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}, x[i]=61] [L29] COND TRUE i < N [L30] COND FALSE !(i > N/2) [L29] i++ VAL [cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}, x[i]=61] [L29] COND TRUE i < N [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 [L29] i++ VAL [cnt=1, i=3, N=3, ret=1, x={3:0}, x={3:0}, x[i]=0] [L29] COND FALSE !(i < N) [L35] COND TRUE cnt !=0 [L36] return ret / cnt; [L61] RET, EXPR rangesum(x) VAL [i=2, N=3, rangesum(x)=1, ret=-1, ret2=-1, temp=1, x={3:0}] [L61] ret5 = rangesum(x) [L63] COND TRUE ret != ret2 || ret !=ret5 VAL [i=2, N=3, ret=-1, ret2=-1, ret5=1, temp=1, x={3:0}] [L64] reach_error() VAL [i=2, N=3, ret=-1, ret2=-1, ret5=1, temp=1, x={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 672.3s, OverallIterations: 9, TraceHistogramMax: 9, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 399.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 102 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 99 mSDsluCounter, 289 SdHoareTripleChecker+Invalid, 2.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 70 IncrementalHoareTripleChecker+Unchecked, 203 mSDsCounter, 81 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 606 IncrementalHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 81 mSolverCounterUnsat, 91 mSDtfsCounter, 606 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 551 GetRequests, 387 SyntacticMatches, 5 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 597.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=8, InterpolantAutomatonStates: 66, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 218.6s InterpolantComputationTime, 270 NumberOfCodeBlocks, 263 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 367 ConstructedInterpolants, 3 QuantifiedInterpolants, 2823 SizeOfPredicates, 47 NumberOfNonLiveVariables, 1333 ConjunctsInSsa, 74 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 332/439 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.7s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 8, DAG_INTERPRETER_EARLY_EXITS: 2, TOOLS_POST_APPLICATIONS: 10, TOOLS_POST_TIME: 0.5s, TOOLS_POST_CALL_APPLICATIONS: 3, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 2, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 15, TOOLS_QUANTIFIERELIM_TIME: 0.5s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.2s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 31, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 8, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 0.4s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.4s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 2, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 192, DAG_COMPRESSION_RETAINED_NODES: 47, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-25 20:27:38,286 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-11-25 20:27:38,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913664aa-0858-4634-93ac-8fd635a0fe83/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE