./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/gauss_sum.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-new/gauss_sum.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH --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 ac0c39e955880a6b0806ad5f8add28438e78eb47defb435342badf7c95feaa91 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:03:09,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:03:09,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:03:09,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:03:09,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:03:09,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:03:09,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:03:09,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:03:09,645 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:03:09,646 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:03:09,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:03:09,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:03:09,649 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:03:09,650 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:03:09,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:03:09,653 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:03:09,654 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:03:09,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:03:09,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:03:09,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:03:09,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:03:09,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:03:09,666 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:03:09,667 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:03:09,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:03:09,671 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:03:09,672 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:03:09,673 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:03:09,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:03:09,674 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:03:09,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:03:09,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:03:09,677 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:03:09,678 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:03:09,679 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:03:09,679 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:03:09,680 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:03:09,680 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:03:09,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:03:09,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:03:09,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:03:09,684 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:03:09,715 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:03:09,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:03:09,716 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:03:09,717 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:03:09,717 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:03:09,717 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:03:09,717 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:03:09,718 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:03:09,718 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:03:09,718 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:03:09,718 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:03:09,719 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:03:09,719 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:03:09,719 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:03:09,719 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:03:09,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:03:09,720 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:03:09,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:03:09,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:03:09,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:03:09,721 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:03:09,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:03:09,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:03:09,722 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:03:09,722 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:03:09,722 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:03:09,723 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:03:09,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:03:09,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:03:09,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:03:09,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:03:09,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:03:09,727 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:03:09,727 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:03:09,727 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:03:09,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:03:09,728 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:03:09,729 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:03:09,729 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:03:09,729 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_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac0c39e955880a6b0806ad5f8add28438e78eb47defb435342badf7c95feaa91 [2021-11-03 05:03:10,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:03:10,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:03:10,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:03:10,077 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:03:10,077 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:03:10,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/loop-new/gauss_sum.i [2021-11-03 05:03:10,141 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/data/851153c0c/9e1a4a3fd3034a5986cc849fe2c11c85/FLAGac5e788fa [2021-11-03 05:03:10,652 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:03:10,654 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/sv-benchmarks/c/loop-new/gauss_sum.i [2021-11-03 05:03:10,665 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/data/851153c0c/9e1a4a3fd3034a5986cc849fe2c11c85/FLAGac5e788fa [2021-11-03 05:03:11,013 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/data/851153c0c/9e1a4a3fd3034a5986cc849fe2c11c85 [2021-11-03 05:03:11,015 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:03:11,017 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:03:11,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:03:11,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:03:11,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:03:11,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:03:11" (1/1) ... [2021-11-03 05:03:11,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@157297cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:03:11, skipping insertion in model container [2021-11-03 05:03:11,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:03:11" (1/1) ... [2021-11-03 05:03:11,032 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:03:11,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:03:11,223 WARN L228 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_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/sv-benchmarks/c/loop-new/gauss_sum.i[891,904] [2021-11-03 05:03:11,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:03:11,248 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:03:11,261 WARN L228 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_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/sv-benchmarks/c/loop-new/gauss_sum.i[891,904] [2021-11-03 05:03:11,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:03:11,277 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:03:11,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:03:11 WrapperNode [2021-11-03 05:03:11,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:03:11,279 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:03:11,280 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:03:11,280 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:03:11,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:03:11" (1/1) ... [2021-11-03 05:03:11,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:03:11" (1/1) ... [2021-11-03 05:03:11,309 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:03:11,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:03:11,310 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:03:11,310 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:03:11,319 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:03:11" (1/1) ... [2021-11-03 05:03:11,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:03:11" (1/1) ... [2021-11-03 05:03:11,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:03:11" (1/1) ... [2021-11-03 05:03:11,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:03:11" (1/1) ... [2021-11-03 05:03:11,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:03:11" (1/1) ... [2021-11-03 05:03:11,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:03:11" (1/1) ... [2021-11-03 05:03:11,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:03:11" (1/1) ... [2021-11-03 05:03:11,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:03:11,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:03:11,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:03:11,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:03:11,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:03:11" (1/1) ... [2021-11-03 05:03:11,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:03:11,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:03:11,381 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:03:11,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:03:11,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:03:11,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:03:11,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:03:11,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:03:11,705 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:03:11,705 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-03 05:03:11,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:03:11 BoogieIcfgContainer [2021-11-03 05:03:11,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:03:11,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:03:11,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:03:11,716 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:03:11,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:03:11" (1/3) ... [2021-11-03 05:03:11,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@104d6293 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:03:11, skipping insertion in model container [2021-11-03 05:03:11,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:03:11" (2/3) ... [2021-11-03 05:03:11,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@104d6293 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:03:11, skipping insertion in model container [2021-11-03 05:03:11,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:03:11" (3/3) ... [2021-11-03 05:03:11,720 INFO L111 eAbstractionObserver]: Analyzing ICFG gauss_sum.i [2021-11-03 05:03:11,724 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:03:11,725 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:03:11,807 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:03:11,830 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 [2021-11-03 05:03:11,836 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:03:11,849 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:11,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 05:03:11,853 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:11,854 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 05:03:11,854 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:03:11,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:11,860 INFO L85 PathProgramCache]: Analyzing trace with hash 62123654, now seen corresponding path program 1 times [2021-11-03 05:03:11,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:03:11,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167056549] [2021-11-03 05:03:11,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:11,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:03:11,953 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 05:03:11,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912528328] [2021-11-03 05:03:11,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:11,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:03:11,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:03:11,956 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:03:11,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 05:03:12,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:12,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:03:12,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:12,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:12,178 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:03:12,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167056549] [2021-11-03 05:03:12,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:03:12,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912528328] [2021-11-03 05:03:12,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912528328] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:12,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:12,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:03:12,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977208006] [2021-11-03 05:03:12,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:03:12,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:03:12,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:03:12,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:03:12,208 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:12,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:12,244 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2021-11-03 05:03:12,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:03:12,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-03 05:03:12,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:12,255 INFO L225 Difference]: With dead ends: 16 [2021-11-03 05:03:12,256 INFO L226 Difference]: Without dead ends: 7 [2021-11-03 05:03:12,258 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:03:12,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-11-03 05:03:12,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-11-03 05:03:12,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:12,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-11-03 05:03:12,285 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2021-11-03 05:03:12,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:12,286 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-11-03 05:03:12,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:12,287 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-11-03 05:03:12,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 05:03:12,288 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:12,288 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 05:03:12,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:03:12,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-03 05:03:12,505 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:03:12,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:12,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1925759241, now seen corresponding path program 1 times [2021-11-03 05:03:12,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:03:12,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252763235] [2021-11-03 05:03:12,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:12,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:03:12,527 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 05:03:12,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1214367271] [2021-11-03 05:03:12,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:12,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:03:12,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:03:12,529 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:03:12,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-03 05:03:12,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:12,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 05:03:12,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:12,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:13,017 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:03:13,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252763235] [2021-11-03 05:03:13,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:03:13,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214367271] [2021-11-03 05:03:13,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214367271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:03:13,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [675277192] [2021-11-03 05:03:13,039 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-03 05:03:13,039 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:03:13,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 05:03:13,049 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 05:03:13,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 05:03:13,078 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:13,080 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:03:13,081 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:13,081 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-03 05:03:13,083 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:03:13,084 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:13,084 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-03 05:03:13,092 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-03 05:03:13,124 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_8|], 10=[|v_#valid_9|]} [2021-11-03 05:03:13,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:13,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-03 05:03:13,152 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:13,155 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-03 05:03:13,156 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:13,156 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-03 05:03:13,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:03:13,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:13,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:13,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:13,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:13,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:13,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:13,227 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 23 treesize of output 22 [2021-11-03 05:03:13,229 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:13,234 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:03:13,236 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:13,237 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:03:13,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:03:13,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:13,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:13,275 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:13,276 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-11-03 05:03:13,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:03:13,277 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:94, output treesize:79 [2021-11-03 05:03:13,299 INFO L180 QuantifierPusher]: treesize reduction 8, result has 92.4 percent of original size [2021-11-03 05:03:13,304 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-03 05:03:13,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:13,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:13,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:13,458 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:13,472 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 242 [2021-11-03 05:03:13,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:13,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:13,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:13,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:13,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:13,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:13,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:13,562 INFO L180 QuantifierPusher]: treesize reduction 24, result has 66.7 percent of original size [2021-11-03 05:03:13,566 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-03 05:03:13,575 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 05:03:14,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:03:14,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:03:14,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-03 05:03:14,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914630902] [2021-11-03 05:03:14,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:03:14,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:03:14,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:03:14,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:03:14,021 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:14,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:14,126 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2021-11-03 05:03:14,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:03:14,126 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-03 05:03:14,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:14,127 INFO L225 Difference]: With dead ends: 11 [2021-11-03 05:03:14,127 INFO L226 Difference]: Without dead ends: 8 [2021-11-03 05:03:14,128 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:03:14,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-03 05:03:14,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-03 05:03:14,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:14,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-11-03 05:03:14,130 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-11-03 05:03:14,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:14,130 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-11-03 05:03:14,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:14,131 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-11-03 05:03:14,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-03 05:03:14,131 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:14,131 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-11-03 05:03:14,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:03:14,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:03:14,349 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:03:14,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:14,349 INFO L85 PathProgramCache]: Analyzing trace with hash -431079706, now seen corresponding path program 2 times [2021-11-03 05:03:14,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:03:14,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640903859] [2021-11-03 05:03:14,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:14,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:03:14,359 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 05:03:14,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332718921] [2021-11-03 05:03:14,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 05:03:14,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:03:14,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:03:14,361 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:03:14,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-03 05:03:14,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-03 05:03:14,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:03:14,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 05:03:14,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:14,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:14,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 05:03:14,834 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:03:14,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640903859] [2021-11-03 05:03:14,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:03:14,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332718921] [2021-11-03 05:03:14,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332718921] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:03:14,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [361421686] [2021-11-03 05:03:14,837 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-03 05:03:14,837 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:03:14,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 05:03:14,838 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 05:03:14,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 05:03:14,843 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:14,844 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:03:14,845 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:14,845 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-03 05:03:14,846 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:03:14,846 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:14,847 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-03 05:03:14,848 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-03 05:03:14,851 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 10=[|v_#valid_10|]} [2021-11-03 05:03:14,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:14,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-03 05:03:14,859 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:14,859 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-03 05:03:14,860 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:14,860 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-03 05:03:14,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:03:14,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:14,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:14,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:14,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:14,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:14,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:14,876 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 23 treesize of output 22 [2021-11-03 05:03:14,876 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:14,878 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:03:14,879 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:14,879 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:03:14,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:03:14,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:14,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:14,892 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:14,894 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-11-03 05:03:14,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:03:14,897 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:94, output treesize:79 [2021-11-03 05:03:14,903 INFO L180 QuantifierPusher]: treesize reduction 8, result has 92.4 percent of original size [2021-11-03 05:03:14,909 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-03 05:03:14,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:14,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:14,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:14,968 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.7 percent of original size [2021-11-03 05:03:14,977 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 230 [2021-11-03 05:03:14,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:15,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:15,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:15,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:15,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:15,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:15,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:15,031 INFO L180 QuantifierPusher]: treesize reduction 24, result has 66.7 percent of original size [2021-11-03 05:03:15,034 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-03 05:03:15,040 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 05:03:15,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:03:15,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:03:15,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-11-03 05:03:15,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800879265] [2021-11-03 05:03:15,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:03:15,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:03:15,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:03:15,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:03:15,416 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:15,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:15,792 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2021-11-03 05:03:15,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:03:15,793 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-03 05:03:15,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:15,793 INFO L225 Difference]: With dead ends: 10 [2021-11-03 05:03:15,793 INFO L226 Difference]: Without dead ends: 0 [2021-11-03 05:03:15,794 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-11-03 05:03:15,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-03 05:03:15,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-03 05:03:15,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:15,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-03 05:03:15,794 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2021-11-03 05:03:15,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:15,794 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-03 05:03:15,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:15,795 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-03 05:03:15,795 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-03 05:03:15,797 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 05:03:15,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-03 05:03:15,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-03 05:03:15,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-03 05:03:16,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:16,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:16,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:16,070 INFO L860 garLoopResultBuilder]: At program point L33(lines 24 34) the Hoare annotation is: true [2021-11-03 05:03:16,070 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-03 05:03:16,070 INFO L857 garLoopResultBuilder]: For program point L27(line 27) no Hoare annotation was computed. [2021-11-03 05:03:16,070 INFO L853 garLoopResultBuilder]: At program point L29-3(lines 29 31) the Hoare annotation is: (and (or (= (+ ULTIMATE.start_main_~n~0 (* ULTIMATE.start_main_~n~0 ULTIMATE.start_main_~n~0)) (* 2 ULTIMATE.start_main_~sum~0)) (<= ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0)) (forall ((ULTIMATE.start_main_~n~0 Int)) (or (< ULTIMATE.start_main_~n~0 ULTIMATE.start_main_~i~0) (<= (+ ULTIMATE.start_main_~i~0 1) ULTIMATE.start_main_~n~0) (= (+ ULTIMATE.start_main_~n~0 (* ULTIMATE.start_main_~n~0 ULTIMATE.start_main_~n~0)) (+ (* 2 ULTIMATE.start_main_~i~0) (* 2 ULTIMATE.start_main_~sum~0)))))) [2021-11-03 05:03:16,070 INFO L857 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-11-03 05:03:16,070 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-03 05:03:16,071 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-11-03 05:03:16,071 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-11-03 05:03:16,071 INFO L860 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-11-03 05:03:16,073 INFO L731 BasicCegarLoop]: Path program histogram: [2, 1] [2021-11-03 05:03:16,075 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-03 05:03:16,081 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] [2021-11-03 05:03:16,081 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] [2021-11-03 05:03:16,081 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] [2021-11-03 05:03:16,081 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] [2021-11-03 05:03:16,081 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] [2021-11-03 05:03:16,096 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] [2021-11-03 05:03:16,096 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] [2021-11-03 05:03:16,096 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] [2021-11-03 05:03:16,096 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] [2021-11-03 05:03:16,096 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] [2021-11-03 05:03:16,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 05:03:16 BoogieIcfgContainer [2021-11-03 05:03:16,098 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-03 05:03:16,098 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-03 05:03:16,098 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-03 05:03:16,099 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-03 05:03:16,099 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:03:11" (3/4) ... [2021-11-03 05:03:16,103 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-03 05:03:16,110 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-11-03 05:03:16,110 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-03 05:03:16,110 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-03 05:03:16,110 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-03 05:03:16,135 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/witness.graphml [2021-11-03 05:03:16,135 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-03 05:03:16,136 INFO L168 Benchmark]: Toolchain (without parser) took 5118.87 ms. Allocated memory was 107.0 MB in the beginning and 134.2 MB in the end (delta: 27.3 MB). Free memory was 67.2 MB in the beginning and 87.6 MB in the end (delta: -20.4 MB). Peak memory consumption was 6.2 MB. Max. memory is 16.1 GB. [2021-11-03 05:03:16,136 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 107.0 MB. Free memory is still 83.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:03:16,136 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.87 ms. Allocated memory is still 107.0 MB. Free memory was 67.0 MB in the beginning and 81.7 MB in the end (delta: -14.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 05:03:16,137 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.46 ms. Allocated memory is still 107.0 MB. Free memory was 81.7 MB in the beginning and 80.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:03:16,137 INFO L168 Benchmark]: Boogie Preprocessor took 32.61 ms. Allocated memory is still 107.0 MB. Free memory was 80.3 MB in the beginning and 79.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:03:16,137 INFO L168 Benchmark]: RCFGBuilder took 364.46 ms. Allocated memory is still 107.0 MB. Free memory was 79.2 MB in the beginning and 69.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 05:03:16,138 INFO L168 Benchmark]: TraceAbstraction took 4388.99 ms. Allocated memory was 107.0 MB in the beginning and 134.2 MB in the end (delta: 27.3 MB). Free memory was 68.7 MB in the beginning and 89.7 MB in the end (delta: -21.0 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. [2021-11-03 05:03:16,138 INFO L168 Benchmark]: Witness Printer took 36.50 ms. Allocated memory is still 134.2 MB. Free memory was 89.7 MB in the beginning and 87.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:03:16,141 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 107.0 MB. Free memory is still 83.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 258.87 ms. Allocated memory is still 107.0 MB. Free memory was 67.0 MB in the beginning and 81.7 MB in the end (delta: -14.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.46 ms. Allocated memory is still 107.0 MB. Free memory was 81.7 MB in the beginning and 80.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.61 ms. Allocated memory is still 107.0 MB. Free memory was 80.3 MB in the beginning and 79.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 364.46 ms. Allocated memory is still 107.0 MB. Free memory was 79.2 MB in the beginning and 69.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4388.99 ms. Allocated memory was 107.0 MB in the beginning and 134.2 MB in the end (delta: 27.3 MB). Free memory was 68.7 MB in the beginning and 89.7 MB in the end (delta: -21.0 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. * Witness Printer took 36.50 ms. Allocated memory is still 134.2 MB. Free memory was 89.7 MB in the beginning and 87.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] * 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 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.2s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 15 SDtfs, 6 SDslu, 21 SDs, 0 SdLazy, 50 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 8 NumberOfFragments, 39 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 85 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 30 ConstructedInterpolants, 2 QuantifiedInterpolants, 173 SizeOfPredicates, 12 NumberOfNonLiveVariables, 138 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 1/8 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: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 29]: Loop Invariant [2021-11-03 05:03:16,151 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] [2021-11-03 05:03:16,152 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] [2021-11-03 05:03:16,152 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] [2021-11-03 05:03:16,152 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] [2021-11-03 05:03:16,152 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] [2021-11-03 05:03:16,153 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] [2021-11-03 05:03:16,153 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] [2021-11-03 05:03:16,153 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] [2021-11-03 05:03:16,153 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] [2021-11-03 05:03:16,153 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0,QUANTIFIED] Derived loop invariant: (n + n * n == 2 * sum || i <= n) && (forall ULTIMATE.start_main_~n~0 : int :: (ULTIMATE.start_main_~n~0 < i || i + 1 <= ULTIMATE.start_main_~n~0) || ULTIMATE.start_main_~n~0 + ULTIMATE.start_main_~n~0 * ULTIMATE.start_main_~n~0 == 2 * i + 2 * sum) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-03 05:03:16,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_542f0f21-9f4f-4c31-b351-9e1c8c52ee39/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE