./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG --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 96b71e4fe20331af08d1b5394215c6ca1c246124118142d0900823a256b0e31d ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 04:42:11,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 04:42:11,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 04:42:11,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 04:42:11,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 04:42:11,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 04:42:11,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 04:42:11,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 04:42:11,862 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 04:42:11,863 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 04:42:11,865 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 04:42:11,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 04:42:11,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 04:42:11,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 04:42:11,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 04:42:11,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 04:42:11,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 04:42:11,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 04:42:11,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 04:42:11,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 04:42:11,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 04:42:11,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 04:42:11,889 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 04:42:11,891 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 04:42:11,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 04:42:11,896 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 04:42:11,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 04:42:11,897 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 04:42:11,898 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 04:42:11,900 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 04:42:11,900 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 04:42:11,902 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 04:42:11,903 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 04:42:11,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 04:42:11,905 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 04:42:11,906 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 04:42:11,907 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 04:42:11,907 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 04:42:11,908 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 04:42:11,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 04:42:11,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 04:42:11,911 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-29 04:42:11,940 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 04:42:11,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 04:42:11,942 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 04:42:11,943 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 04:42:11,943 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 04:42:11,944 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 04:42:11,944 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 04:42:11,945 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 04:42:11,945 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 04:42:11,945 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 04:42:11,946 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 04:42:11,946 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 04:42:11,947 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 04:42:11,947 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 04:42:11,948 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 04:42:11,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 04:42:11,949 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 04:42:11,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 04:42:11,950 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 04:42:11,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 04:42:11,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 04:42:11,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 04:42:11,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 04:42:11,953 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 04:42:11,953 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 04:42:11,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 04:42:11,954 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 04:42:11,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 04:42:11,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 04:42:11,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 04:42:11,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 04:42:11,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 04:42:11,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 04:42:11,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 04:42:11,956 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 04:42:11,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 04:42:11,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 04:42:11,957 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 04:42:11,957 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 04:42:11,958 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_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 96b71e4fe20331af08d1b5394215c6ca1c246124118142d0900823a256b0e31d [2021-10-29 04:42:12,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 04:42:12,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 04:42:12,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 04:42:12,262 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 04:42:12,263 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 04:42:12,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound10.c [2021-10-29 04:42:12,340 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/data/b8ef7cc36/d13db22cffb241c58bc9e1f40a356038/FLAGce2ae5224 [2021-10-29 04:42:12,908 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 04:42:12,910 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound10.c [2021-10-29 04:42:12,924 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/data/b8ef7cc36/d13db22cffb241c58bc9e1f40a356038/FLAGce2ae5224 [2021-10-29 04:42:13,243 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/data/b8ef7cc36/d13db22cffb241c58bc9e1f40a356038 [2021-10-29 04:42:13,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 04:42:13,252 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 04:42:13,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 04:42:13,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 04:42:13,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 04:42:13,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:42:13" (1/1) ... [2021-10-29 04:42:13,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a95c244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:42:13, skipping insertion in model container [2021-10-29 04:42:13,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:42:13" (1/1) ... [2021-10-29 04:42:13,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 04:42:13,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 04:42:13,512 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound10.c[524,537] [2021-10-29 04:42:13,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 04:42:13,536 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 04:42:13,550 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound10.c[524,537] [2021-10-29 04:42:13,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 04:42:13,576 INFO L208 MainTranslator]: Completed translation [2021-10-29 04:42:13,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:42:13 WrapperNode [2021-10-29 04:42:13,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 04:42:13,579 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 04:42:13,579 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 04:42:13,579 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 04:42:13,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:42:13" (1/1) ... [2021-10-29 04:42:13,596 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:42:13" (1/1) ... [2021-10-29 04:42:13,619 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 04:42:13,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 04:42:13,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 04:42:13,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 04:42:13,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:42:13" (1/1) ... [2021-10-29 04:42:13,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:42:13" (1/1) ... [2021-10-29 04:42:13,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:42:13" (1/1) ... [2021-10-29 04:42:13,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:42:13" (1/1) ... [2021-10-29 04:42:13,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:42:13" (1/1) ... [2021-10-29 04:42:13,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:42:13" (1/1) ... [2021-10-29 04:42:13,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:42:13" (1/1) ... [2021-10-29 04:42:13,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 04:42:13,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 04:42:13,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 04:42:13,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 04:42:13,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:42:13" (1/1) ... [2021-10-29 04:42:13,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 04:42:13,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:42:13,693 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 04:42:13,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 04:42:13,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 04:42:13,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 04:42:13,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 04:42:13,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 04:42:14,431 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 04:42:14,431 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-29 04:42:14,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:42:14 BoogieIcfgContainer [2021-10-29 04:42:14,434 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 04:42:14,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 04:42:14,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 04:42:14,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 04:42:14,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 04:42:13" (1/3) ... [2021-10-29 04:42:14,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d47c02a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:42:14, skipping insertion in model container [2021-10-29 04:42:14,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:42:13" (2/3) ... [2021-10-29 04:42:14,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d47c02a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:42:14, skipping insertion in model container [2021-10-29 04:42:14,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:42:14" (3/3) ... [2021-10-29 04:42:14,450 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound10.c [2021-10-29 04:42:14,456 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 04:42:14,457 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-29 04:42:14,527 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 04:42:14,536 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 [2021-10-29 04:42:14,537 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-29 04:42:14,556 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:42:14,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 04:42:14,586 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:42:14,587 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 04:42:14,588 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:42:14,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:42:14,594 INFO L85 PathProgramCache]: Analyzing trace with hash 98480205, now seen corresponding path program 1 times [2021-10-29 04:42:14,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:42:14,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310000398] [2021-10-29 04:42:14,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:42:14,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:42:14,690 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 04:42:14,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126784013] [2021-10-29 04:42:14,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:42:14,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:42:14,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:42:14,693 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:42:14,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-29 04:42:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:42:14,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-29 04:42:14,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:42:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:42:14,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:42:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:42:14,858 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:42:14,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310000398] [2021-10-29 04:42:14,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 04:42:14,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126784013] [2021-10-29 04:42:14,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126784013] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 04:42:14,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:42:14,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-29 04:42:14,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527597883] [2021-10-29 04:42:14,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-29 04:42:14,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:42:14,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-29 04:42:14,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 04:42:14,896 INFO L87 Difference]: Start difference. First operand has 13 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:42:14,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:42:14,914 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2021-10-29 04:42:14,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-29 04:42:14,915 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-29 04:42:14,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:42:14,925 INFO L225 Difference]: With dead ends: 25 [2021-10-29 04:42:14,926 INFO L226 Difference]: Without dead ends: 11 [2021-10-29 04:42:14,929 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 04:42:14,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-29 04:42:14,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-29 04:42:14,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:42:14,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-29 04:42:14,967 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 5 [2021-10-29 04:42:14,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:42:14,967 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-29 04:42:14,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:42:14,968 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-29 04:42:14,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 04:42:14,969 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:42:14,969 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 04:42:15,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-29 04:42:15,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-29 04:42:15,196 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:42:15,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:42:15,197 INFO L85 PathProgramCache]: Analyzing trace with hash 97621232, now seen corresponding path program 1 times [2021-10-29 04:42:15,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:42:15,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123881757] [2021-10-29 04:42:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:42:15,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:42:15,213 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 04:42:15,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389678600] [2021-10-29 04:42:15,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:42:15,216 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:42:15,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:42:15,218 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:42:15,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-29 04:42:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:42:15,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-29 04:42:15,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:42:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:42:15,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:42:15,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:42:15,755 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:42:15,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123881757] [2021-10-29 04:42:15,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 04:42:15,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389678600] [2021-10-29 04:42:15,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389678600] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 04:42:15,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:42:15,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-29 04:42:15,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425815957] [2021-10-29 04:42:15,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 04:42:15,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:42:15,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 04:42:15,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-29 04:42:15,760 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:42:17,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:42:17,845 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-10-29 04:42:17,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 04:42:17,846 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-29 04:42:17,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:42:17,847 INFO L225 Difference]: With dead ends: 25 [2021-10-29 04:42:17,847 INFO L226 Difference]: Without dead ends: 23 [2021-10-29 04:42:17,848 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-29 04:42:17,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-29 04:42:17,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 14. [2021-10-29 04:42:17,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:42:17,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-10-29 04:42:17,853 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 5 [2021-10-29 04:42:17,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:42:17,853 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-29 04:42:17,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:42:17,854 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-10-29 04:42:17,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-29 04:42:17,854 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:42:17,855 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-29 04:42:17,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-29 04:42:18,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:42:18,056 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:42:18,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:42:18,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1268746775, now seen corresponding path program 1 times [2021-10-29 04:42:18,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:42:18,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517329215] [2021-10-29 04:42:18,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:42:18,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:42:18,068 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 04:42:18,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123538510] [2021-10-29 04:42:18,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:42:18,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:42:18,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:42:18,078 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:42:18,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-29 04:42:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:42:18,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-29 04:42:18,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:42:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:42:18,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:42:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:42:18,201 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:42:18,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517329215] [2021-10-29 04:42:18,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 04:42:18,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123538510] [2021-10-29 04:42:18,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123538510] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 04:42:18,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:42:18,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-29 04:42:18,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001856041] [2021-10-29 04:42:18,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-29 04:42:18,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:42:18,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-29 04:42:18,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-29 04:42:18,207 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:42:18,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:42:18,241 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-10-29 04:42:18,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 04:42:18,242 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-29 04:42:18,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:42:18,243 INFO L225 Difference]: With dead ends: 25 [2021-10-29 04:42:18,243 INFO L226 Difference]: Without dead ends: 21 [2021-10-29 04:42:18,244 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-29 04:42:18,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-29 04:42:18,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2021-10-29 04:42:18,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:42:18,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-10-29 04:42:18,249 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 6 [2021-10-29 04:42:18,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:42:18,249 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-29 04:42:18,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:42:18,250 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-10-29 04:42:18,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-29 04:42:18,251 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:42:18,251 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:42:18,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-29 04:42:18,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-29 04:42:18,468 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:42:18,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:42:18,469 INFO L85 PathProgramCache]: Analyzing trace with hash 546169794, now seen corresponding path program 1 times [2021-10-29 04:42:18,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:42:18,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575463668] [2021-10-29 04:42:18,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:42:18,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:42:18,476 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 04:42:18,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218083494] [2021-10-29 04:42:18,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:42:18,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:42:18,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:42:18,478 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:42:18,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-29 04:42:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:42:18,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-29 04:42:18,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:42:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:42:18,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:42:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:42:18,868 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:42:18,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575463668] [2021-10-29 04:42:18,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 04:42:18,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218083494] [2021-10-29 04:42:18,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218083494] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 04:42:18,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:42:18,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-10-29 04:42:18,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373160729] [2021-10-29 04:42:18,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-29 04:42:18,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:42:18,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-29 04:42:18,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-29 04:42:18,872 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:42:19,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:42:19,023 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-10-29 04:42:19,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 04:42:19,025 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-29 04:42:19,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:42:19,025 INFO L225 Difference]: With dead ends: 21 [2021-10-29 04:42:19,026 INFO L226 Difference]: Without dead ends: 15 [2021-10-29 04:42:19,026 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-29 04:42:19,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-29 04:42:19,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-29 04:42:19,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:42:19,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-10-29 04:42:19,030 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2021-10-29 04:42:19,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:42:19,030 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-10-29 04:42:19,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:42:19,031 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-10-29 04:42:19,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-29 04:42:19,031 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:42:19,032 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-29 04:42:19,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-29 04:42:19,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:42:19,244 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:42:19,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:42:19,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1998402165, now seen corresponding path program 1 times [2021-10-29 04:42:19,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:42:19,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399724250] [2021-10-29 04:42:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:42:19,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:42:19,252 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 04:42:19,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832447896] [2021-10-29 04:42:19,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:42:19,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:42:19,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:42:19,254 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:42:19,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-29 04:42:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:42:19,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-29 04:42:19,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:42:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:42:19,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:42:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:42:19,476 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:42:19,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399724250] [2021-10-29 04:42:19,476 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 04:42:19,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832447896] [2021-10-29 04:42:19,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832447896] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 04:42:19,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [117970079] [2021-10-29 04:42:19,515 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-29 04:42:19,516 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 04:42:19,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 04:42:19,528 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 04:42:19,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 04:42:19,577 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:19,583 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:42:19,584 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:19,585 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 04:42:19,587 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:42:19,587 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:19,588 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 04:42:19,597 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 241 [2021-10-29 04:42:19,665 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_21|], 21=[|v_#valid_22|]} [2021-10-29 04:42:19,721 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-29 04:42:19,721 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:19,722 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 04:42:19,722 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:19,723 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 04:42:19,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 04:42:19,745 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-29 04:42:19,746 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:19,746 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 04:42:19,747 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:19,747 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 04:42:19,748 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 04:42:19,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:42:19,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:42:19,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:42:19,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-29 04:42:19,813 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:19,814 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 04:42:19,815 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:19,816 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 04:42:19,816 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-29 04:42:19,834 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-29 04:42:19,835 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:19,836 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 04:42:19,836 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:19,837 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 04:42:19,837 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-10-29 04:42:19,854 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-29 04:42:19,854 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:19,855 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 04:42:19,855 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:19,856 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 04:42:19,856 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-10-29 04:42:19,879 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-29 04:42:19,880 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:19,881 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 04:42:19,881 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:19,882 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 04:42:19,882 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-10-29 04:42:19,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:19,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:19,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:42:19,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:42:20,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:42:20,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:42:20,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:42:20,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:42:20,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:42:20,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:42:20,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:42:20,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-10-29 04:42:20,041 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:20,046 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 04:42:20,056 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:20,057 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 04:42:20,058 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-10-29 04:42:20,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:20,126 INFO L180 QuantifierPusher]: treesize reduction 8, result has 95.0 percent of original size [2021-10-29 04:42:20,130 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 151 [2021-10-29 04:42:20,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 04:42:20,138 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 2 variables, input treesize:1124, output treesize:151 [2021-10-29 04:42:20,148 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:20,157 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 156 [2021-10-29 04:42:20,174 INFO L180 QuantifierPusher]: treesize reduction 7, result has 96.8 percent of original size [2021-10-29 04:42:20,188 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 206 [2021-10-29 04:42:20,203 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:20,221 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 266 [2021-10-29 04:42:20,237 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:20,245 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 271 [2021-10-29 04:42:20,259 INFO L180 QuantifierPusher]: treesize reduction 69, result has 79.3 percent of original size [2021-10-29 04:42:20,274 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 251 [2021-10-29 04:42:20,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,490 INFO L180 QuantifierPusher]: treesize reduction 38, result has 75.8 percent of original size [2021-10-29 04:42:20,499 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:42:20,501 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:20,510 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-29 04:42:20,511 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:42:20,514 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:20,523 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-10-29 04:42:20,532 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 109 [2021-10-29 04:42:20,538 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:20,543 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-10-29 04:42:20,551 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:20,559 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 155 [2021-10-29 04:42:20,576 INFO L180 QuantifierPusher]: treesize reduction 38, result has 75.8 percent of original size [2021-10-29 04:42:20,582 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:42:20,583 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:20,599 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-10-29 04:42:20,601 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:42:20,603 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:20,618 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-29 04:42:20,645 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 109 [2021-10-29 04:42:20,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,746 INFO L180 QuantifierPusher]: treesize reduction 36, result has 66.4 percent of original size [2021-10-29 04:42:20,749 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-10-29 04:42:20,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:20,814 INFO L180 QuantifierPusher]: treesize reduction 40, result has 64.0 percent of original size [2021-10-29 04:42:20,818 INFO L185 QuantifierPusher]: treesize reduction 3, result has 95.4 percent of original size 62 [2021-10-29 04:42:20,827 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 04:42:21,865 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 04:42:21,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 04:42:21,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-29 04:42:21,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315076780] [2021-10-29 04:42:21,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-29 04:42:21,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:42:21,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-29 04:42:21,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-10-29 04:42:21,869 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:42:21,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:42:21,980 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-10-29 04:42:21,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-29 04:42:21,981 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-29 04:42:21,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:42:21,982 INFO L225 Difference]: With dead ends: 35 [2021-10-29 04:42:21,982 INFO L226 Difference]: Without dead ends: 31 [2021-10-29 04:42:21,982 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-10-29 04:42:21,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-29 04:42:21,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-29 04:42:21,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:42:21,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-10-29 04:42:21,992 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 14 [2021-10-29 04:42:21,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:42:21,993 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-10-29 04:42:21,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:42:21,994 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-10-29 04:42:21,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-29 04:42:21,996 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:42:21,996 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1] [2021-10-29 04:42:22,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-29 04:42:22,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:42:22,210 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:42:22,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:42:22,211 INFO L85 PathProgramCache]: Analyzing trace with hash 652162767, now seen corresponding path program 2 times [2021-10-29 04:42:22,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:42:22,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144723657] [2021-10-29 04:42:22,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:42:22,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:42:22,219 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 04:42:22,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [623704036] [2021-10-29 04:42:22,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-29 04:42:22,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:42:22,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:42:22,222 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:42:22,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-29 04:42:22,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-29 04:42:22,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 04:42:22,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-29 04:42:22,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:42:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:42:22,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:42:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:42:23,008 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:42:23,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144723657] [2021-10-29 04:42:23,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 04:42:23,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623704036] [2021-10-29 04:42:23,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623704036] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 04:42:23,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1665627955] [2021-10-29 04:42:23,011 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-29 04:42:23,011 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 04:42:23,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 04:42:23,012 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 04:42:23,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 04:42:23,022 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,023 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:42:23,023 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,024 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 04:42:23,025 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:42:23,025 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,026 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 04:42:23,030 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 241 [2021-10-29 04:42:23,042 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_22|], 21=[|v_#valid_23|]} [2021-10-29 04:42:23,054 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-29 04:42:23,055 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,055 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 04:42:23,056 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,057 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 04:42:23,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 04:42:23,067 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-29 04:42:23,068 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,069 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 04:42:23,069 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,070 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 04:42:23,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 04:42:23,080 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-29 04:42:23,081 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,082 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 04:42:23,082 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,083 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 04:42:23,083 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-29 04:42:23,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:42:23,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:42:23,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:42:23,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-29 04:42:23,106 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,107 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 04:42:23,108 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,108 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 04:42:23,109 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-10-29 04:42:23,119 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-29 04:42:23,119 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,120 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 04:42:23,120 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,121 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 04:42:23,121 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-10-29 04:42:23,129 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-29 04:42:23,130 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,130 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 04:42:23,131 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,131 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 04:42:23,132 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-10-29 04:42:23,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:42:23,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:42:23,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:42:23,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:42:23,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:42:23,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:42:23,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:42:23,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:42:23,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:42:23,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-10-29 04:42:23,188 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,191 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 04:42:23,192 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,192 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 04:42:23,193 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-10-29 04:42:23,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,205 INFO L180 QuantifierPusher]: treesize reduction 8, result has 95.0 percent of original size [2021-10-29 04:42:23,208 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 151 [2021-10-29 04:42:23,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 04:42:23,209 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 2 variables, input treesize:1124, output treesize:151 [2021-10-29 04:42:23,218 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,223 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 156 [2021-10-29 04:42:23,235 INFO L180 QuantifierPusher]: treesize reduction 7, result has 96.8 percent of original size [2021-10-29 04:42:23,241 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 206 [2021-10-29 04:42:23,252 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,261 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 266 [2021-10-29 04:42:23,270 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,282 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 271 [2021-10-29 04:42:23,291 INFO L180 QuantifierPusher]: treesize reduction 69, result has 79.3 percent of original size [2021-10-29 04:42:23,298 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 251 [2021-10-29 04:42:23,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,355 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,407 INFO L180 QuantifierPusher]: treesize reduction 38, result has 75.8 percent of original size [2021-10-29 04:42:23,413 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:42:23,414 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,421 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-29 04:42:23,422 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:42:23,424 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,433 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-10-29 04:42:23,439 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 109 [2021-10-29 04:42:23,443 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,448 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-10-29 04:42:23,458 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,466 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 155 [2021-10-29 04:42:23,479 INFO L180 QuantifierPusher]: treesize reduction 38, result has 75.8 percent of original size [2021-10-29 04:42:23,481 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:42:23,483 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,487 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-29 04:42:23,488 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:42:23,489 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:42:23,495 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-10-29 04:42:23,502 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 109 [2021-10-29 04:42:23,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,566 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,577 INFO L180 QuantifierPusher]: treesize reduction 36, result has 66.4 percent of original size [2021-10-29 04:42:23,580 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-10-29 04:42:23,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:42:23,632 INFO L180 QuantifierPusher]: treesize reduction 40, result has 64.0 percent of original size [2021-10-29 04:42:23,635 INFO L185 QuantifierPusher]: treesize reduction 3, result has 95.4 percent of original size 62 [2021-10-29 04:42:23,647 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 04:42:24,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 04:42:24,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 04:42:24,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-10-29 04:42:24,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206872901] [2021-10-29 04:42:24,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-29 04:42:24,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:42:24,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-29 04:42:24,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-10-29 04:42:24,694 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:42:24,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:42:24,859 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2021-10-29 04:42:24,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-29 04:42:24,860 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-29 04:42:24,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:42:24,861 INFO L225 Difference]: With dead ends: 51 [2021-10-29 04:42:24,861 INFO L226 Difference]: Without dead ends: 47 [2021-10-29 04:42:24,862 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-10-29 04:42:24,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-29 04:42:24,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-10-29 04:42:24,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:42:24,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-10-29 04:42:24,871 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 30 [2021-10-29 04:42:24,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:42:24,872 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-10-29 04:42:24,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:42:24,872 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-10-29 04:42:24,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-29 04:42:24,874 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:42:24,874 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1] [2021-10-29 04:42:24,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-29 04:42:25,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-29 04:42:25,080 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:42:25,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:42:25,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1711839251, now seen corresponding path program 3 times [2021-10-29 04:42:25,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:42:25,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744073284] [2021-10-29 04:42:25,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:42:25,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:42:25,086 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 04:42:25,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218981454] [2021-10-29 04:42:25,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-29 04:42:25,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:42:25,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:42:25,087 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:42:25,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-29 04:42:25,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-29 04:42:25,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-29 04:42:25,923 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 04:42:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 04:42:26,206 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-29 04:42:26,207 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 04:42:26,224 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 04:42:26,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 04:42:26,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-29 04:42:26,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-10-29 04:42:26,451 INFO L731 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1] [2021-10-29 04:42:26,455 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 04:42:26,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 04:42:26 BoogieIcfgContainer [2021-10-29 04:42:26,552 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 04:42:26,552 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 04:42:26,552 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 04:42:26,553 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 04:42:26,553 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:42:14" (3/4) ... [2021-10-29 04:42:26,555 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-29 04:42:26,627 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 04:42:26,627 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 04:42:26,628 INFO L168 Benchmark]: Toolchain (without parser) took 13375.25 ms. Allocated memory was 113.2 MB in the beginning and 163.6 MB in the end (delta: 50.3 MB). Free memory was 70.5 MB in the beginning and 71.8 MB in the end (delta: -1.3 MB). Peak memory consumption was 49.3 MB. Max. memory is 16.1 GB. [2021-10-29 04:42:26,628 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 113.2 MB. Free memory was 86.7 MB in the beginning and 86.7 MB in the end (delta: 59.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 04:42:26,629 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.92 ms. Allocated memory is still 113.2 MB. Free memory was 70.3 MB in the beginning and 86.4 MB in the end (delta: -16.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-29 04:42:26,629 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.60 ms. Allocated memory is still 113.2 MB. Free memory was 86.4 MB in the beginning and 84.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 04:42:26,629 INFO L168 Benchmark]: Boogie Preprocessor took 24.09 ms. Allocated memory is still 113.2 MB. Free memory was 84.7 MB in the beginning and 83.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 04:42:26,630 INFO L168 Benchmark]: RCFGBuilder took 789.71 ms. Allocated memory is still 113.2 MB. Free memory was 83.6 MB in the beginning and 68.3 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-29 04:42:26,630 INFO L168 Benchmark]: TraceAbstraction took 12115.48 ms. Allocated memory was 113.2 MB in the beginning and 163.6 MB in the end (delta: 50.3 MB). Free memory was 68.0 MB in the beginning and 77.0 MB in the end (delta: -9.0 MB). Peak memory consumption was 45.3 MB. Max. memory is 16.1 GB. [2021-10-29 04:42:26,631 INFO L168 Benchmark]: Witness Printer took 74.57 ms. Allocated memory is still 163.6 MB. Free memory was 77.0 MB in the beginning and 71.8 MB in the end (delta: 5.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-29 04:42:26,633 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 113.2 MB. Free memory was 86.7 MB in the beginning and 86.7 MB in the end (delta: 59.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 320.92 ms. Allocated memory is still 113.2 MB. Free memory was 70.3 MB in the beginning and 86.4 MB in the end (delta: -16.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.60 ms. Allocated memory is still 113.2 MB. Free memory was 86.4 MB in the beginning and 84.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.09 ms. Allocated memory is still 113.2 MB. Free memory was 84.7 MB in the beginning and 83.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 789.71 ms. Allocated memory is still 113.2 MB. Free memory was 83.6 MB in the beginning and 68.3 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12115.48 ms. Allocated memory was 113.2 MB in the beginning and 163.6 MB in the end (delta: 50.3 MB). Free memory was 68.0 MB in the beginning and 77.0 MB in the end (delta: -9.0 MB). Peak memory consumption was 45.3 MB. Max. memory is 16.1 GB. * Witness Printer took 74.57 ms. Allocated memory is still 163.6 MB. Free memory was 77.0 MB in the beginning and 71.8 MB in the end (delta: 5.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * 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: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L9] COND FALSE !(!cond) [L30] u = ((long long) 2 * R) + 1 [L31] v = 1 [L32] r = ((long long) R * R) - A VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=1] [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=1] [L34] EXPR counter++ VAL [counter=2] [L34] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=2] [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=2] [L34] EXPR counter++ VAL [counter=3] [L34] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=3] [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=3] [L34] EXPR counter++ VAL [counter=4] [L34] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=4] [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=4] [L34] EXPR counter++ VAL [counter=5] [L34] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=5] [L36] COND FALSE !(!(r != 0)) [L38] COND FALSE !(r > 0) [L42] r = r + u [L43] u = u + 2 VAL [counter=5] [L34] EXPR counter++ VAL [counter=6] [L34] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=6] [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=6] [L34] EXPR counter++ VAL [counter=7] [L34] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=7] [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=7] [L34] EXPR counter++ VAL [counter=8] [L34] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=8] [L36] COND FALSE !(!(r != 0)) [L38] COND FALSE !(r > 0) [L42] r = r + u [L43] u = u + 2 VAL [counter=8] [L34] EXPR counter++ VAL [counter=9] [L34] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=9] [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=9] [L34] EXPR counter++ VAL [counter=10] [L34] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=10] [L36] COND FALSE !(!(r != 0)) [L38] COND FALSE !(r > 0) [L42] r = r + u [L43] u = u + 2 VAL [counter=10] [L34] EXPR counter++ VAL [counter=11] [L34] COND FALSE !(counter++<10) [L12] COND TRUE !(cond) VAL [counter=11] [L14] reach_error() VAL [counter=11] - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 11.9s, OverallIterations: 7, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 54 SDtfs, 47 SDslu, 119 SDs, 0 SdLazy, 95 SolverSat, 27 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 187 GetRequests, 119 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=6, InterpolantAutomatonStates: 54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 13 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 114 NumberOfCodeBlocks, 114 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 124 ConstructedInterpolants, 0 QuantifiedInterpolants, 534 SizeOfPredicates, 25 NumberOfNonLiveVariables, 465 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 12 InterpolantComputations, 8 PerfectInterpolantSequences, 0/160 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! [2021-10-29 04:42:26,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b63b23b-a911-4518-b007-1885755a3321/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...