./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum05.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum05.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V --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 aee69f990ab81a58f1fe8cd275c8a09f43ca6a442f73810f885d3d0c9a85d2b3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:31:46,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:31:46,645 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:31:46,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:31:46,707 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:31:46,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:31:46,710 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:31:46,713 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:31:46,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:31:46,716 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:31:46,718 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:31:46,719 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:31:46,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:31:46,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:31:46,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:31:46,741 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:31:46,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:31:46,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:31:46,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:31:46,755 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:31:46,760 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:31:46,770 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:31:46,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:31:46,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:31:46,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:31:46,780 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:31:46,780 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:31:46,781 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:31:46,783 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:31:46,784 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:31:46,785 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:31:46,786 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:31:46,788 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:31:46,789 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:31:46,791 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:31:46,791 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:31:46,792 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:31:46,792 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:31:46,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:31:46,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:31:46,794 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:31:46,795 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:31:46,846 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:31:46,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:31:46,847 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:31:46,847 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:31:46,848 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:31:46,849 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:31:46,849 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:31:46,849 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:31:46,849 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:31:46,850 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:31:46,851 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:31:46,851 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:31:46,851 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:31:46,851 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:31:46,851 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:31:46,852 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:31:46,852 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:31:46,852 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:31:46,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:31:46,853 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:31:46,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:31:46,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:31:46,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:31:46,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:31:46,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:31:46,855 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:31:46,856 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:31:46,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:31:46,857 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:31:46,857 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:31:46,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:31:46,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:31:46,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:31:46,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:31:46,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:31:46,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:31:46,859 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:31:46,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:31:46,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:31:46,859 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:31:46,860 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:31:46,860 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_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aee69f990ab81a58f1fe8cd275c8a09f43ca6a442f73810f885d3d0c9a85d2b3 [2021-11-23 02:31:47,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:31:47,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:31:47,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:31:47,195 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:31:47,196 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:31:47,198 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/reducercommutativity/rangesum05.i [2021-11-23 02:31:47,266 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/data/574591e93/5b2cb21f4492469f9fea35e877169f7e/FLAG00b161b71 [2021-11-23 02:31:47,800 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:31:47,801 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/sv-benchmarks/c/reducercommutativity/rangesum05.i [2021-11-23 02:31:47,807 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/data/574591e93/5b2cb21f4492469f9fea35e877169f7e/FLAG00b161b71 [2021-11-23 02:31:48,185 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/data/574591e93/5b2cb21f4492469f9fea35e877169f7e [2021-11-23 02:31:48,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:31:48,191 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:31:48,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:31:48,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:31:48,202 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:31:48,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:31:48" (1/1) ... [2021-11-23 02:31:48,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@587eb2a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:48, skipping insertion in model container [2021-11-23 02:31:48,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:31:48" (1/1) ... [2021-11-23 02:31:48,214 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:31:48,232 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:31:48,373 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_92d0ad37-ea56-45ce-826e-ffd73cd2637c/sv-benchmarks/c/reducercommutativity/rangesum05.i[1457,1470] [2021-11-23 02:31:48,387 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:31:48,394 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:31:48,415 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_92d0ad37-ea56-45ce-826e-ffd73cd2637c/sv-benchmarks/c/reducercommutativity/rangesum05.i[1457,1470] [2021-11-23 02:31:48,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:31:48,429 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:31:48,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:48 WrapperNode [2021-11-23 02:31:48,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:31:48,430 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:31:48,431 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:31:48,431 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:31:48,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:48" (1/1) ... [2021-11-23 02:31:48,446 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:48" (1/1) ... [2021-11-23 02:31:48,466 INFO L137 Inliner]: procedures = 17, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2021-11-23 02:31:48,466 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:31:48,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:31:48,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:31:48,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:31:48,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:48" (1/1) ... [2021-11-23 02:31:48,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:48" (1/1) ... [2021-11-23 02:31:48,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:48" (1/1) ... [2021-11-23 02:31:48,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:48" (1/1) ... [2021-11-23 02:31:48,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:48" (1/1) ... [2021-11-23 02:31:48,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:48" (1/1) ... [2021-11-23 02:31:48,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:48" (1/1) ... [2021-11-23 02:31:48,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:31:48,496 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:31:48,496 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:31:48,497 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:31:48,498 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:48" (1/1) ... [2021-11-23 02:31:48,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:31:48,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:31:48,546 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:31:48,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:31:48,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:31:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:31:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:31:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:31:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:31:48,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:31:48,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:31:48,595 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2021-11-23 02:31:48,595 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2021-11-23 02:31:48,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:31:48,702 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:31:48,704 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:31:48,941 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:31:49,019 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:31:49,025 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 02:31:49,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:31:49 BoogieIcfgContainer [2021-11-23 02:31:49,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:31:49,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:31:49,031 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:31:49,035 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:31:49,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:31:48" (1/3) ... [2021-11-23 02:31:49,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f8f7a85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:31:49, skipping insertion in model container [2021-11-23 02:31:49,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:48" (2/3) ... [2021-11-23 02:31:49,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f8f7a85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:31:49, skipping insertion in model container [2021-11-23 02:31:49,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:31:49" (3/3) ... [2021-11-23 02:31:49,039 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2021-11-23 02:31:49,045 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:31:49,045 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:31:49,110 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:31:49,125 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 [2021-11-23 02:31:49,125 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:31:49,153 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 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) [2021-11-23 02:31:49,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 02:31:49,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:31:49,159 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:31:49,160 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:31:49,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:31:49,166 INFO L85 PathProgramCache]: Analyzing trace with hash -362891911, now seen corresponding path program 1 times [2021-11-23 02:31:49,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:31:49,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057638628] [2021-11-23 02:31:49,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:49,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:31:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:49,357 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:31:49,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057638628] [2021-11-23 02:31:49,359 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-23 02:31:49,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037234616] [2021-11-23 02:31:49,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:49,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:31:49,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:31:49,363 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:31:49,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:31:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:49,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:31:49,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:31:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:31:49,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:31:49,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037234616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:31:49,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:31:49,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:31:49,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271777022] [2021-11-23 02:31:49,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:31:49,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:31:49,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:31:49,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:31:49,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:31:49,636 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 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) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-11-23 02:31:49,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:31:49,676 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-11-23 02:31:49,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:31:49,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 20 [2021-11-23 02:31:49,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:31:49,685 INFO L225 Difference]: With dead ends: 33 [2021-11-23 02:31:49,685 INFO L226 Difference]: Without dead ends: 16 [2021-11-23 02:31:49,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:31:49,692 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:31:49,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:31:49,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-23 02:31:49,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-23 02:31:49,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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) [2021-11-23 02:31:49,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-11-23 02:31:49,729 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2021-11-23 02:31:49,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:31:49,729 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-11-23 02:31:49,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-11-23 02:31:49,730 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-11-23 02:31:49,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 02:31:49,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:31:49,732 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:31:49,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:31:49,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-23 02:31:49,954 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:31:49,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:31:49,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1234920756, now seen corresponding path program 1 times [2021-11-23 02:31:49,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:31:49,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114027252] [2021-11-23 02:31:49,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:49,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:31:49,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:49,986 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:31:49,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114027252] [2021-11-23 02:31:49,987 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-23 02:31:49,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213799767] [2021-11-23 02:31:49,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:49,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:31:49,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:31:49,988 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:31:50,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:31:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:50,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:31:50,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:31:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:31:50,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:31:50,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213799767] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:31:50,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:31:50,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:31:50,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052620637] [2021-11-23 02:31:50,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:31:50,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:31:50,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:31:50,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:31:50,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:31:50,166 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:31:50,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:31:50,190 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2021-11-23 02:31:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:31:50,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 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 21 [2021-11-23 02:31:50,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:31:50,192 INFO L225 Difference]: With dead ends: 29 [2021-11-23 02:31:50,192 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 02:31:50,192 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 [2021-11-23 02:31:50,194 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:31:50,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:31:50,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 02:31:50,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 02:31:50,199 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) [2021-11-23 02:31:50,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-23 02:31:50,200 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2021-11-23 02:31:50,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:31:50,201 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-23 02:31:50,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:31:50,201 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-23 02:31:50,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 02:31:50,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:31:50,202 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:31:50,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:31:50,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:31:50,417 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:31:50,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:31:50,417 INFO L85 PathProgramCache]: Analyzing trace with hash -877476800, now seen corresponding path program 1 times [2021-11-23 02:31:50,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:31:50,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95872611] [2021-11-23 02:31:50,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:50,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:31:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:50,468 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:31:50,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95872611] [2021-11-23 02:31:50,469 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-23 02:31:50,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178284518] [2021-11-23 02:31:50,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:50,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:31:50,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:31:50,486 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:31:50,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:31:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:50,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:31:50,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:31:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:31:50,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:31:50,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178284518] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:31:50,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:31:50,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:31:50,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875736622] [2021-11-23 02:31:50,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:31:50,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:31:50,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:31:50,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:31:50,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:31:50,609 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2021-11-23 02:31:50,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:31:50,628 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-11-23 02:31:50,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:31:50,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 24 [2021-11-23 02:31:50,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:31:50,629 INFO L225 Difference]: With dead ends: 27 [2021-11-23 02:31:50,630 INFO L226 Difference]: Without dead ends: 18 [2021-11-23 02:31:50,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:31:50,632 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:31:50,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:31:50,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-23 02:31:50,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-23 02:31:50,637 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) [2021-11-23 02:31:50,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-23 02:31:50,638 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2021-11-23 02:31:50,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:31:50,639 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-23 02:31:50,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2021-11-23 02:31:50,640 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-23 02:31:50,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 02:31:50,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:31:50,641 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:31:50,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:31:50,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:31:50,862 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:31:50,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:31:50,863 INFO L85 PathProgramCache]: Analyzing trace with hash 140313158, now seen corresponding path program 1 times [2021-11-23 02:31:50,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:31:50,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727964648] [2021-11-23 02:31:50,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:50,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:31:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:50,890 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:31:50,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727964648] [2021-11-23 02:31:50,891 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-23 02:31:50,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249733733] [2021-11-23 02:31:50,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:50,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:31:50,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:31:50,893 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:31:50,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:31:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:50,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:31:50,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:31:51,038 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:31:51,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:31:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:31:51,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249733733] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:31:51,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1043150738] [2021-11-23 02:31:51,150 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:31:51,151 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:31:51,156 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:31:51,161 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:31:51,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:31:51,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:51,296 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 02:31:51,299 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 17 treesize of output 26 [2021-11-23 02:31:51,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:51,357 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:31:51,357 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 [2021-11-23 02:31:51,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:51,438 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 39 treesize of output 41 [2021-11-23 02:31:51,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:51,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:51,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:51,674 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:31:51,675 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 232 treesize of output 220 [2021-11-23 02:31:51,774 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 25 treesize of output 21 [2021-11-23 02:31:52,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:52,193 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 [2021-11-23 02:31:52,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:52,645 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 [2021-11-23 02:31:52,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:52,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:52,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:52,734 INFO L354 Elim1Store]: treesize reduction 65, result has 27.0 percent of original size [2021-11-23 02:31:52,735 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 72 treesize of output 80 [2021-11-23 02:31:52,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:52,822 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 [2021-11-23 02:31:52,846 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 13 treesize of output 9 [2021-11-23 02:31:53,279 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-23 02:31:53,458 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:31:59,578 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '576#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= 5 |ULTIMATE.start_init_nondet_~i~0#1|) (<= 4 |ULTIMATE.start_main_~i~2#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|))) (<= |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) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 16 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 02:31:59,578 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:31:59,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:31:59,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-11-23 02:31:59,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139002489] [2021-11-23 02:31:59,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:31:59,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:31:59,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:31:59,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:31:59,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=267, Unknown=1, NotChecked=0, Total=342 [2021-11-23 02:31:59,581 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) [2021-11-23 02:31:59,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:31:59,630 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-11-23 02:31:59,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:31:59,633 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 [2021-11-23 02:31:59,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:31:59,634 INFO L225 Difference]: With dead ends: 36 [2021-11-23 02:31:59,634 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 02:31:59,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=74, Invalid=267, Unknown=1, NotChecked=0, Total=342 [2021-11-23 02:31:59,637 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:31:59,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:31:59,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 02:31:59,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-23 02:31:59,641 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) [2021-11-23 02:31:59,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-23 02:31:59,642 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2021-11-23 02:31:59,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:31:59,643 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-23 02:31:59,643 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) [2021-11-23 02:31:59,643 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-23 02:31:59,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 02:31:59,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:31:59,644 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:31:59,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:31:59,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:31:59,867 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:31:59,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:31:59,868 INFO L85 PathProgramCache]: Analyzing trace with hash 139189043, now seen corresponding path program 2 times [2021-11-23 02:31:59,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:31:59,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123592934] [2021-11-23 02:31:59,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:59,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:31:59,901 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:31:59,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486694949] [2021-11-23 02:31:59,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:31:59,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:31:59,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:31:59,908 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:31:59,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:31:59,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 02:31:59,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:31:59,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:31:59,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:32:00,036 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:32:00,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:32:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:32:00,104 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:32:00,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123592934] [2021-11-23 02:32:00,105 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:32:00,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486694949] [2021-11-23 02:32:00,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486694949] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:32:00,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [784303327] [2021-11-23 02:32:00,112 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:32:00,112 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:32:00,113 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:32:00,113 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:32:00,114 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:32:00,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:00,156 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:32:00,157 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 [2021-11-23 02:32:00,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:00,169 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 17 treesize of output 22 [2021-11-23 02:32:00,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:00,197 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 34 treesize of output 36 [2021-11-23 02:32:00,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:00,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:32:00,292 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:32:00,294 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 222 treesize of output 221 [2021-11-23 02:32:00,430 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 25 treesize of output 21 [2021-11-23 02:32:00,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:00,626 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 [2021-11-23 02:32:00,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:00,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:00,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:32:00,909 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 [2021-11-23 02:32:00,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:00,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:00,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:00,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:00,964 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 02:32:00,965 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 [2021-11-23 02:32:00,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:00,999 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 [2021-11-23 02:32:01,017 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 13 treesize of output 9 [2021-11-23 02:32:01,338 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-23 02:32:01,471 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:32:04,966 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '848#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (<= 5 |ULTIMATE.start_init_nondet_~i~0#1|) (<= 4 |ULTIMATE.start_main_~i~2#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|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_12 Int)) (and (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_12) (or (and (= v_rangesum_~cnt~0_BEFORE_RETURN_12 0) (= |ULTIMATE.start_main_~ret5~0#1| 0)) (and (exists ((v_rangesum_~ret~0_BEFORE_RETURN_12 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_12 v_rangesum_~cnt~0_BEFORE_RETURN_12) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_12 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_12 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_12 v_rangesum_~cnt~0_BEFORE_RETURN_12)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_12 v_rangesum_~cnt~0_BEFORE_RETURN_12) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_12 v_rangesum_~cnt~0_BEFORE_RETURN_12)) 4294967296) 2147483647) (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_12 v_rangesum_~cnt~0_BEFORE_RETURN_12) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_12 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_12 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_12 v_rangesum_~cnt~0_BEFORE_RETURN_12)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_12 v_rangesum_~cnt~0_BEFORE_RETURN_12) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_12 v_rangesum_~cnt~0_BEFORE_RETURN_12)) 4294967296) (+ (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_12 v_rangesum_~cnt~0_BEFORE_RETURN_12) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_12 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_12 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_12 v_rangesum_~cnt~0_BEFORE_RETURN_12)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_12 v_rangesum_~cnt~0_BEFORE_RETURN_12) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_12 v_rangesum_~cnt~0_BEFORE_RETURN_12)) 4294967296) (- 4294967296))))) (not (= v_rangesum_~cnt~0_BEFORE_RETURN_12 0)))))) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 16 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 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|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:32:04,967 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:32:04,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:32:04,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-23 02:32:04,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176990908] [2021-11-23 02:32:04,968 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:32:04,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:32:04,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:32:04,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:32:04,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-23 02:32:04,972 INFO L87 Difference]: Start difference. First operand 21 states and 25 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, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:32:05,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:05,004 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2021-11-23 02:32:05,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:32:05,004 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, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-11-23 02:32:05,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:05,005 INFO L225 Difference]: With dead ends: 38 [2021-11-23 02:32:05,006 INFO L226 Difference]: Without dead ends: 24 [2021-11-23 02:32:05,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-23 02:32:05,007 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:05,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:32:05,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-23 02:32:05,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-23 02:32:05,012 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) [2021-11-23 02:32:05,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-23 02:32:05,013 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2021-11-23 02:32:05,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:05,014 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-23 02:32:05,014 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, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:32:05,014 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-23 02:32:05,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 02:32:05,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:05,015 INFO L514 BasicCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:32:05,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:32:05,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:32:05,230 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:05,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:05,230 INFO L85 PathProgramCache]: Analyzing trace with hash 378555129, now seen corresponding path program 3 times [2021-11-23 02:32:05,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:32:05,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892175007] [2021-11-23 02:32:05,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:05,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:32:05,253 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:32:05,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151570367] [2021-11-23 02:32:05,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:32:05,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:32:05,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:32:05,277 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:32:05,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:32:05,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:32:05,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:32:05,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:32:05,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:32:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 02:32:05,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:32:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 02:32:05,544 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:32:05,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892175007] [2021-11-23 02:32:05,544 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:32:05,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151570367] [2021-11-23 02:32:05,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151570367] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:32:05,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1827934426] [2021-11-23 02:32:05,547 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:32:05,547 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:32:05,548 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:32:05,548 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:32:05,548 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:32:05,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:05,579 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:32:05,579 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 [2021-11-23 02:32:05,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:05,590 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 17 treesize of output 22 [2021-11-23 02:32:05,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:05,611 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 39 treesize of output 41 [2021-11-23 02:32:05,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:05,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:05,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:05,679 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:32:05,679 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 232 treesize of output 220 [2021-11-23 02:32:05,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:32:05,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:05,934 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 [2021-11-23 02:32:06,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:06,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:06,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:32:06,209 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 [2021-11-23 02:32:06,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:06,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:06,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:06,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:06,265 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 02:32:06,266 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 [2021-11-23 02:32:06,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:06,297 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 [2021-11-23 02:32:06,313 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 13 treesize of output 9 [2021-11-23 02:32:06,597 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-23 02:32:06,726 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:32:13,948 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1185#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (<= 5 |ULTIMATE.start_init_nondet_~i~0#1|) (<= 4 |ULTIMATE.start_main_~i~2#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|))) (<= |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) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 16 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 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|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:32:13,948 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:32:13,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:32:13,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-11-23 02:32:13,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907561033] [2021-11-23 02:32:13,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:32:13,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:32:13,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:32:13,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:32:13,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=299, Unknown=1, NotChecked=0, Total=380 [2021-11-23 02:32:13,950 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:32:13,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:13,980 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-11-23 02:32:13,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:32:13,981 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-11-23 02:32:13,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:13,982 INFO L225 Difference]: With dead ends: 42 [2021-11-23 02:32:13,982 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 02:32:13,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=80, Invalid=299, Unknown=1, NotChecked=0, Total=380 [2021-11-23 02:32:13,983 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:13,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:32:13,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 02:32:13,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-23 02:32:13,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 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) [2021-11-23 02:32:13,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-11-23 02:32:13,989 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 37 [2021-11-23 02:32:13,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:13,990 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-11-23 02:32:13,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:32:13,990 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-11-23 02:32:13,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-23 02:32:13,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:13,991 INFO L514 BasicCegarLoop]: trace histogram [15, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:32:14,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-23 02:32:14,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:32:14,194 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:14,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:14,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1265888179, now seen corresponding path program 4 times [2021-11-23 02:32:14,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:32:14,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242493427] [2021-11-23 02:32:14,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:14,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:32:14,221 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:32:14,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1699951091] [2021-11-23 02:32:14,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:32:14,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:32:14,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:32:14,226 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:32:14,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:32:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:14,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:32:14,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:32:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-11-23 02:32:14,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:32:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-11-23 02:32:14,524 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:32:14,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242493427] [2021-11-23 02:32:14,525 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:32:14,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699951091] [2021-11-23 02:32:14,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699951091] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:32:14,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2007649656] [2021-11-23 02:32:14,529 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:32:14,535 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:32:14,536 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:32:14,536 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:32:14,536 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:32:14,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:14,586 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 02:32:14,587 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 17 treesize of output 26 [2021-11-23 02:32:14,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:14,613 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:32:14,618 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 [2021-11-23 02:32:14,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:14,649 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 39 treesize of output 41 [2021-11-23 02:32:14,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:14,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:14,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:14,717 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:32:14,718 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 232 treesize of output 220 [2021-11-23 02:32:14,761 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 25 treesize of output 21 [2021-11-23 02:32:14,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:14,924 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 [2021-11-23 02:32:15,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:15,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:15,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:32:15,156 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 [2021-11-23 02:32:15,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:15,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:15,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:15,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:15,204 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 02:32:15,205 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 [2021-11-23 02:32:15,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:15,248 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 [2021-11-23 02:32:15,261 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 13 treesize of output 9 [2021-11-23 02:32:15,594 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-23 02:32:15,722 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:32:21,448 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1550#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (<= 5 |ULTIMATE.start_init_nondet_~i~0#1|) (<= 4 |ULTIMATE.start_main_~i~2#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|))) (<= |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) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 16 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_24 Int)) (and (or (and (not (= v_rangesum_~cnt~0_BEFORE_RETURN_24 0)) (exists ((v_rangesum_~ret~0_BEFORE_RETURN_24 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_24 0) (not (= 0 (mod v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_24 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)) 4294967296) 2147483647) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_24 0) (not (= 0 (mod v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_24 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)) 4294967296) (+ (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_24 0) (not (= 0 (mod v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_24 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)) 4294967296) (- 4294967296)))))) (and (= v_rangesum_~cnt~0_BEFORE_RETURN_24 0) (= |ULTIMATE.start_main_~ret5~0#1| 0))) (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_24))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:32:21,449 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:32:21,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:32:21,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-11-23 02:32:21,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061728691] [2021-11-23 02:32:21,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:32:21,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:32:21,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:32:21,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:32:21,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:32:21,451 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2021-11-23 02:32:21,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:21,478 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-11-23 02:32:21,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:32:21,478 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 40 [2021-11-23 02:32:21,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:21,479 INFO L225 Difference]: With dead ends: 45 [2021-11-23 02:32:21,479 INFO L226 Difference]: Without dead ends: 26 [2021-11-23 02:32:21,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:32:21,481 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:21,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:32:21,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-23 02:32:21,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-23 02:32:21,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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) [2021-11-23 02:32:21,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-11-23 02:32:21,487 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 40 [2021-11-23 02:32:21,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:21,487 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-11-23 02:32:21,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2021-11-23 02:32:21,488 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-11-23 02:32:21,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 02:32:21,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:21,489 INFO L514 BasicCegarLoop]: trace histogram [15, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:32:21,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:32:21,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:32:21,694 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:21,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:21,694 INFO L85 PathProgramCache]: Analyzing trace with hash -869471866, now seen corresponding path program 5 times [2021-11-23 02:32:21,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:32:21,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880605899] [2021-11-23 02:32:21,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:21,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:32:21,717 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:32:21,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813607596] [2021-11-23 02:32:21,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:32:21,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:32:21,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:32:21,719 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:32:21,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:32:21,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:32:21,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:32:21,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:32:21,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:32:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-23 02:32:21,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:32:21,936 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-11-23 02:32:21,936 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:32:21,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880605899] [2021-11-23 02:32:21,937 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:32:21,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813607596] [2021-11-23 02:32:21,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813607596] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:32:21,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1419762864] [2021-11-23 02:32:21,940 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:32:21,940 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:32:21,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:32:21,941 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:32:21,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:32:21,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:21,981 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:32:21,982 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 [2021-11-23 02:32:21,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:21,990 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 17 treesize of output 22 [2021-11-23 02:32:22,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:22,011 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 39 treesize of output 41 [2021-11-23 02:32:22,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:22,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:22,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:22,088 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:32:22,089 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 232 treesize of output 220 [2021-11-23 02:32:22,134 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 25 treesize of output 21 [2021-11-23 02:32:22,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:22,384 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 [2021-11-23 02:32:22,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:22,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:22,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:32:22,659 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 [2021-11-23 02:32:22,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:22,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:22,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:22,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:22,713 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 02:32:22,714 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 [2021-11-23 02:32:22,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:22,744 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 [2021-11-23 02:32:22,758 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 13 treesize of output 9 [2021-11-23 02:32:23,045 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-23 02:32:23,172 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:32:29,139 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1928#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (<= 5 |ULTIMATE.start_init_nondet_~i~0#1|) (<= 4 |ULTIMATE.start_main_~i~2#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|))) (<= |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) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 16 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 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|) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_30 Int)) (and (or (and (= v_rangesum_~cnt~0_BEFORE_RETURN_30 0) (= |ULTIMATE.start_main_~ret5~0#1| 0)) (and (not (= v_rangesum_~cnt~0_BEFORE_RETURN_30 0)) (exists ((v_rangesum_~ret~0_BEFORE_RETURN_30 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_30 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_30 v_rangesum_~cnt~0_BEFORE_RETURN_30) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_30 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_30 v_rangesum_~cnt~0_BEFORE_RETURN_30)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_30 v_rangesum_~cnt~0_BEFORE_RETURN_30) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_30 v_rangesum_~cnt~0_BEFORE_RETURN_30)) 4294967296) 2147483647) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_30 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_30 v_rangesum_~cnt~0_BEFORE_RETURN_30) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_30 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_30 v_rangesum_~cnt~0_BEFORE_RETURN_30)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_30 v_rangesum_~cnt~0_BEFORE_RETURN_30) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_30 v_rangesum_~cnt~0_BEFORE_RETURN_30)) 4294967296) (+ (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_30 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_30 v_rangesum_~cnt~0_BEFORE_RETURN_30) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_30 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_30 v_rangesum_~cnt~0_BEFORE_RETURN_30)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_30 v_rangesum_~cnt~0_BEFORE_RETURN_30) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_30 v_rangesum_~cnt~0_BEFORE_RETURN_30)) 4294967296) (- 4294967296))))))) (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_30))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:32:29,139 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:32:29,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:32:29,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-23 02:32:29,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955041980] [2021-11-23 02:32:29,139 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:32:29,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:32:29,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:32:29,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:32:29,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-23 02:32:29,142 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:32:29,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:29,171 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-11-23 02:32:29,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:32:29,172 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2021-11-23 02:32:29,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:29,172 INFO L225 Difference]: With dead ends: 42 [2021-11-23 02:32:29,173 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 02:32:29,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-23 02:32:29,174 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:29,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:32:29,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 02:32:29,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-23 02:32:29,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 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) [2021-11-23 02:32:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-11-23 02:32:29,181 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 41 [2021-11-23 02:32:29,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:29,181 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-11-23 02:32:29,182 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:32:29,182 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-11-23 02:32:29,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-23 02:32:29,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:29,183 INFO L514 BasicCegarLoop]: trace histogram [15, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:32:29,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:32:29,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:32:29,384 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:29,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:29,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1216362112, now seen corresponding path program 6 times [2021-11-23 02:32:29,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:32:29,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135046325] [2021-11-23 02:32:29,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:29,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:32:29,405 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:32:29,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592679748] [2021-11-23 02:32:29,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:32:29,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:32:29,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:32:29,417 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:32:29,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:32:29,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:32:29,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-11-23 02:32:29,813 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 02:32:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:32:30,436 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 02:32:30,436 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 02:32:30,437 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 02:32:30,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:32:30,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 02:32:30,644 INFO L732 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1] [2021-11-23 02:32:30,647 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 02:32:30,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:32:30 BoogieIcfgContainer [2021-11-23 02:32:30,701 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 02:32:30,702 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 02:32:30,702 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 02:32:30,702 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 02:32:30,703 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:31:49" (3/4) ... [2021-11-23 02:32:30,705 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-23 02:32:30,779 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 02:32:30,780 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 02:32:30,780 INFO L158 Benchmark]: Toolchain (without parser) took 42589.48ms. Allocated memory was 90.2MB in the beginning and 142.6MB in the end (delta: 52.4MB). Free memory was 58.7MB in the beginning and 91.1MB in the end (delta: -32.4MB). Peak memory consumption was 22.3MB. Max. memory is 16.1GB. [2021-11-23 02:32:30,781 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 90.2MB. Free memory was 56.4MB in the beginning and 56.3MB in the end (delta: 52.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:32:30,781 INFO L158 Benchmark]: CACSL2BoogieTranslator took 234.49ms. Allocated memory is still 90.2MB. Free memory was 58.5MB in the beginning and 48.3MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 02:32:30,782 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.24ms. Allocated memory is still 90.2MB. Free memory was 48.2MB in the beginning and 46.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:32:30,782 INFO L158 Benchmark]: Boogie Preprocessor took 28.10ms. Allocated memory is still 90.2MB. Free memory was 46.7MB in the beginning and 45.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:32:30,782 INFO L158 Benchmark]: RCFGBuilder took 532.50ms. Allocated memory was 90.2MB in the beginning and 117.4MB in the end (delta: 27.3MB). Free memory was 45.4MB in the beginning and 89.5MB in the end (delta: -44.1MB). Peak memory consumption was 17.2MB. Max. memory is 16.1GB. [2021-11-23 02:32:30,783 INFO L158 Benchmark]: TraceAbstraction took 41670.99ms. Allocated memory was 117.4MB in the beginning and 142.6MB in the end (delta: 25.2MB). Free memory was 89.5MB in the beginning and 95.3MB in the end (delta: -5.8MB). Peak memory consumption was 19.9MB. Max. memory is 16.1GB. [2021-11-23 02:32:30,783 INFO L158 Benchmark]: Witness Printer took 78.10ms. Allocated memory is still 142.6MB. Free memory was 95.3MB in the beginning and 91.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 02:32:30,785 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 90.2MB. Free memory was 56.4MB in the beginning and 56.3MB in the end (delta: 52.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 234.49ms. Allocated memory is still 90.2MB. Free memory was 58.5MB in the beginning and 48.3MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.24ms. Allocated memory is still 90.2MB. Free memory was 48.2MB in the beginning and 46.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.10ms. Allocated memory is still 90.2MB. Free memory was 46.7MB in the beginning and 45.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 532.50ms. Allocated memory was 90.2MB in the beginning and 117.4MB in the end (delta: 27.3MB). Free memory was 45.4MB in the beginning and 89.5MB in the end (delta: -44.1MB). Peak memory consumption was 17.2MB. Max. memory is 16.1GB. * TraceAbstraction took 41670.99ms. Allocated memory was 117.4MB in the beginning and 142.6MB in the end (delta: 25.2MB). Free memory was 89.5MB in the beginning and 95.3MB in the end (delta: -5.8MB). Peak memory consumption was 19.9MB. Max. memory is 16.1GB. * Witness Printer took 78.10ms. Allocated memory is still 142.6MB. Free memory was 95.3MB in the beginning and 91.1MB 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: 61]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L42] int x[5]; [L43] CALL init_nondet(x) [L16] int i; [L17] i = 0 VAL [i=0, x={3:0}, x={3:0}] [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=1, x={3:0}, x={3:0}] [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=2, x={3:0}, x={3:0}] [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=3, x={3:0}, x={3:0}] [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=4, x={3:0}, x={3:0}] [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=5, x={3:0}, x={3:0}] [L17] COND FALSE !(i < 5) [L43] RET init_nondet(x) [L44] int temp; [L45] int ret; [L46] int ret2; [L47] int ret5; VAL [x={3:0}] [L49] CALL, EXPR rangesum(x) VAL [x={3:0}] [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 VAL [cnt=0, i=0, ret=0, x={3:0}, x={3:0}] [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ VAL [cnt=0, i=1, ret=0, x={3:0}, x={3:0}, x[i]=36] [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ VAL [cnt=0, i=2, ret=0, x={3:0}, x={3:0}, x[i]=36] [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ VAL [cnt=0, i=3, ret=0, x={3:0}, x={3:0}, x[i]=36] [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=1, i=4, ret=4, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=2, i=5, ret=-9, x={3:0}, x={3:0}, x[i]=0] [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L49] RET, EXPR rangesum(x) VAL [rangesum(x)=-4, x={3:0}] [L49] ret = rangesum(x) [L51] EXPR x[0] [L51] temp=x[0] [L51] EXPR x[1] [L51] x[0] = x[1] [L51] x[1] = temp VAL [ret=-4, temp=3, x={3:0}] [L52] CALL, EXPR rangesum(x) VAL [x={3:0}] [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 VAL [cnt=0, i=0, ret=0, x={3:0}, x={3:0}] [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ VAL [cnt=0, i=1, ret=0, x={3:0}, x={3:0}, x[i]=60] [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ VAL [cnt=0, i=2, ret=0, x={3:0}, x={3:0}, x[i]=60] [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ VAL [cnt=0, i=3, ret=0, x={3:0}, x={3:0}, x[i]=60] [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=1, i=4, ret=4, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=2, i=5, ret=-9, x={3:0}, x={3:0}, x[i]=0] [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L52] RET, EXPR rangesum(x) VAL [rangesum(x)=-4, ret=-4, temp=3, x={3:0}] [L52] ret2 = rangesum(x) [L53] EXPR x[0] [L53] temp=x[0] [L54] int i =0 ; VAL [i=0, ret=-4, ret2=-4, temp=1, x={3:0}] [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=1, ret=-4, ret2=-4, temp=1, x={3:0}] [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=2, ret=-4, ret2=-4, temp=1, x={3:0}] [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=3, ret=-4, ret2=-4, temp=1, x={3:0}] [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=4, ret=-4, ret2=-4, temp=1, x={3:0}] [L54] COND FALSE !(i<5 -1) [L57] x[5 -1] = temp VAL [i=4, ret=-4, ret2=-4, temp=1, x={3:0}] [L58] CALL, EXPR rangesum(x) VAL [x={3:0}] [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 VAL [cnt=0, i=0, ret=0, x={3:0}, x={3:0}] [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ VAL [cnt=0, i=1, ret=0, x={3:0}, x={3:0}, x[i]=88] [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ VAL [cnt=0, i=2, ret=0, x={3:0}, x={3:0}, x[i]=88] [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ VAL [cnt=0, i=3, ret=0, x={3:0}, x={3:0}, x[i]=88] [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=1, i=4, ret=-13, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=2, i=5, ret=-12, x={3:0}, x={3:0}, x[i]=0] [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L58] RET, EXPR rangesum(x) VAL [i=4, rangesum(x)=-6, ret=-4, ret2=-4, temp=1, x={3:0}] [L58] ret5 = rangesum(x) [L60] COND TRUE ret != ret2 || ret !=ret5 VAL [i=4, ret=-4, ret2=-4, ret5=-6, temp=1, x={3:0}] [L61] reach_error() VAL [i=4, ret=-4, ret2=-4, ret5=-6, temp=1, x={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 41.5s, OverallIterations: 9, TraceHistogramMax: 15, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 291 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 270 mSDsCounter, 14 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 179 IncrementalHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14 mSolverCounterUnsat, 97 mSDtfsCounter, 179 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 565 GetRequests, 473 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 28.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=8, InterpolantAutomatonStates: 41, 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 370 NumberOfCodeBlocks, 345 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 394 ConstructedInterpolants, 0 QuantifiedInterpolants, 464 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1208 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 987/1085 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 RESULT: Ultimate proved your program to be incorrect! [2021-11-23 02:32:30,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d0ad37-ea56-45ce-826e-ffd73cd2637c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 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