./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_5a.c.cil.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_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/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_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/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_d07a403d-9833-47bb-8c05-66a253ad6775/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 56fa69f51cecff86efdf0a61690ed015021e7cc9e751ed1d6e6cce84bff6d69c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 04:54:54,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 04:54:54,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 04:54:54,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 04:54:54,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 04:54:54,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 04:54:54,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 04:54:54,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 04:54:54,824 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 04:54:54,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 04:54:54,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 04:54:54,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 04:54:54,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 04:54:54,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 04:54:54,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 04:54:54,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 04:54:54,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 04:54:54,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 04:54:54,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 04:54:54,848 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 04:54:54,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 04:54:54,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 04:54:54,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 04:54:54,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 04:54:54,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 04:54:54,871 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 04:54:54,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 04:54:54,873 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 04:54:54,877 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 04:54:54,879 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 04:54:54,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 04:54:54,881 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 04:54:54,883 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 04:54:54,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 04:54:54,886 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 04:54:54,887 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 04:54:54,887 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 04:54:54,888 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 04:54:54,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 04:54:54,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 04:54:54,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 04:54:54,891 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-29 04:54:54,938 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 04:54:54,938 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 04:54:54,940 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 04:54:54,940 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 04:54:54,940 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 04:54:54,941 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 04:54:54,941 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 04:54:54,941 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 04:54:54,947 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 04:54:54,948 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 04:54:54,949 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 04:54:54,949 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 04:54:54,950 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 04:54:54,950 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 04:54:54,950 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 04:54:54,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 04:54:54,952 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 04:54:54,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 04:54:54,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 04:54:54,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 04:54:54,953 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 04:54:54,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 04:54:54,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 04:54:54,953 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 04:54:54,954 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 04:54:54,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 04:54:54,954 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 04:54:54,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 04:54:54,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 04:54:54,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 04:54:54,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 04:54:54,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 04:54:54,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 04:54:54,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 04:54:54,957 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 04:54:54,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 04:54:54,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 04:54:54,957 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 04:54:54,958 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 04:54:54,958 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_d07a403d-9833-47bb-8c05-66a253ad6775/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56fa69f51cecff86efdf0a61690ed015021e7cc9e751ed1d6e6cce84bff6d69c [2021-10-29 04:54:55,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 04:54:55,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 04:54:55,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 04:54:55,314 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 04:54:55,315 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 04:54:55,316 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c [2021-10-29 04:54:55,405 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/data/6bbc85253/74ef6b69f1c145658db2a22dd64be5e0/FLAG47836df88 [2021-10-29 04:54:55,990 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 04:54:55,990 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c [2021-10-29 04:54:56,008 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/data/6bbc85253/74ef6b69f1c145658db2a22dd64be5e0/FLAG47836df88 [2021-10-29 04:54:56,324 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/data/6bbc85253/74ef6b69f1c145658db2a22dd64be5e0 [2021-10-29 04:54:56,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 04:54:56,329 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 04:54:56,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 04:54:56,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 04:54:56,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 04:54:56,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:54:56" (1/1) ... [2021-10-29 04:54:56,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70182cc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:54:56, skipping insertion in model container [2021-10-29 04:54:56,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:54:56" (1/1) ... [2021-10-29 04:54:56,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 04:54:56,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 04:54:56,527 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_d07a403d-9833-47bb-8c05-66a253ad6775/sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c[423,436] [2021-10-29 04:54:56,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 04:54:56,601 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 04:54:56,617 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_d07a403d-9833-47bb-8c05-66a253ad6775/sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c[423,436] [2021-10-29 04:54:56,655 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 04:54:56,685 INFO L208 MainTranslator]: Completed translation [2021-10-29 04:54:56,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:54:56 WrapperNode [2021-10-29 04:54:56,686 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 04:54:56,688 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 04:54:56,689 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 04:54:56,689 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 04:54:56,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:54:56" (1/1) ... [2021-10-29 04:54:56,725 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:54:56" (1/1) ... [2021-10-29 04:54:56,766 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 04:54:56,770 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 04:54:56,771 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 04:54:56,771 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 04:54:56,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:54:56" (1/1) ... [2021-10-29 04:54:56,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:54:56" (1/1) ... [2021-10-29 04:54:56,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:54:56" (1/1) ... [2021-10-29 04:54:56,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:54:56" (1/1) ... [2021-10-29 04:54:56,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:54:56" (1/1) ... [2021-10-29 04:54:56,795 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:54:56" (1/1) ... [2021-10-29 04:54:56,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:54:56" (1/1) ... [2021-10-29 04:54:56,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 04:54:56,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 04:54:56,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 04:54:56,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 04:54:56,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:54:56" (1/1) ... [2021-10-29 04:54:56,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 04:54:56,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:54:56,844 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 04:54:56,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 04:54:56,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 04:54:56,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 04:54:56,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 04:54:56,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 04:54:57,495 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 04:54:57,496 INFO L299 CfgBuilder]: Removed 24 assume(true) statements. [2021-10-29 04:54:57,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:54:57 BoogieIcfgContainer [2021-10-29 04:54:57,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 04:54:57,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 04:54:57,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 04:54:57,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 04:54:57,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 04:54:56" (1/3) ... [2021-10-29 04:54:57,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d2fe152 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:54:57, skipping insertion in model container [2021-10-29 04:54:57,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:54:56" (2/3) ... [2021-10-29 04:54:57,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d2fe152 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:54:57, skipping insertion in model container [2021-10-29 04:54:57,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:54:57" (3/3) ... [2021-10-29 04:54:57,513 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2021-10-29 04:54:57,519 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 04:54:57,519 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-29 04:54:57,584 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 04:54:57,592 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 04:54:57,592 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-29 04:54:57,624 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 53 states have (on average 1.7735849056603774) internal successors, (94), 54 states have internal predecessors, (94), 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 04:54:57,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-29 04:54:57,633 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:54:57,634 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:54:57,634 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:54:57,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:54:57,640 INFO L85 PathProgramCache]: Analyzing trace with hash -381959243, now seen corresponding path program 1 times [2021-10-29 04:54:57,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:54:57,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630623305] [2021-10-29 04:54:57,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:54:57,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:54:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:54:57,909 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 04:54:57,909 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:54:57,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630623305] [2021-10-29 04:54:57,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630623305] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:54:57,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:54:57,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 04:54:57,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154291878] [2021-10-29 04:54:57,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 04:54:57,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:54:57,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 04:54:57,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 04:54:57,934 INFO L87 Difference]: Start difference. First operand has 55 states, 53 states have (on average 1.7735849056603774) internal successors, (94), 54 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 04:54:58,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:54:58,091 INFO L93 Difference]: Finished difference Result 101 states and 170 transitions. [2021-10-29 04:54:58,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 04:54:58,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 04:54:58,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:54:58,116 INFO L225 Difference]: With dead ends: 101 [2021-10-29 04:54:58,116 INFO L226 Difference]: Without dead ends: 53 [2021-10-29 04:54:58,120 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 04:54:58,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-29 04:54:58,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2021-10-29 04:54:58,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.530612244897959) internal successors, (75), 49 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:54:58,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2021-10-29 04:54:58,167 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 14 [2021-10-29 04:54:58,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:54:58,168 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2021-10-29 04:54:58,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 04:54:58,168 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2021-10-29 04:54:58,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-29 04:54:58,170 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:54:58,171 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:54:58,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 04:54:58,171 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:54:58,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:54:58,175 INFO L85 PathProgramCache]: Analyzing trace with hash 697101634, now seen corresponding path program 1 times [2021-10-29 04:54:58,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:54:58,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460086398] [2021-10-29 04:54:58,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:54:58,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:54:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:54:58,264 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 04:54:58,265 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:54:58,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460086398] [2021-10-29 04:54:58,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460086398] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:54:58,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:54:58,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 04:54:58,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207987832] [2021-10-29 04:54:58,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 04:54:58,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:54:58,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 04:54:58,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 04:54:58,272 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 04:54:58,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:54:58,336 INFO L93 Difference]: Finished difference Result 99 states and 147 transitions. [2021-10-29 04:54:58,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 04:54:58,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) Word has length 17 [2021-10-29 04:54:58,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:54:58,338 INFO L225 Difference]: With dead ends: 99 [2021-10-29 04:54:58,338 INFO L226 Difference]: Without dead ends: 59 [2021-10-29 04:54:58,339 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 04:54:58,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-29 04:54:58,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2021-10-29 04:54:58,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.4821428571428572) internal successors, (83), 56 states have internal predecessors, (83), 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 04:54:58,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 83 transitions. [2021-10-29 04:54:58,348 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 83 transitions. Word has length 17 [2021-10-29 04:54:58,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:54:58,348 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 83 transitions. [2021-10-29 04:54:58,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 04:54:58,348 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 83 transitions. [2021-10-29 04:54:58,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-29 04:54:58,350 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:54:58,350 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:54:58,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-29 04:54:58,350 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:54:58,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:54:58,351 INFO L85 PathProgramCache]: Analyzing trace with hash -542227389, now seen corresponding path program 1 times [2021-10-29 04:54:58,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:54:58,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909167503] [2021-10-29 04:54:58,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:54:58,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:54:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:54:58,433 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 04:54:58,434 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:54:58,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909167503] [2021-10-29 04:54:58,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909167503] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:54:58,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:54:58,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 04:54:58,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171359953] [2021-10-29 04:54:58,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 04:54:58,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:54:58,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 04:54:58,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:54:58,437 INFO L87 Difference]: Start difference. First operand 57 states and 83 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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 04:54:58,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:54:58,531 INFO L93 Difference]: Finished difference Result 105 states and 152 transitions. [2021-10-29 04:54:58,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 04:54:58,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) Word has length 19 [2021-10-29 04:54:58,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:54:58,533 INFO L225 Difference]: With dead ends: 105 [2021-10-29 04:54:58,533 INFO L226 Difference]: Without dead ends: 56 [2021-10-29 04:54:58,534 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:54:58,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-29 04:54:58,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-10-29 04:54:58,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 51 states have internal predecessors, (74), 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 04:54:58,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 74 transitions. [2021-10-29 04:54:58,541 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 74 transitions. Word has length 19 [2021-10-29 04:54:58,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:54:58,542 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 74 transitions. [2021-10-29 04:54:58,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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 04:54:58,542 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 74 transitions. [2021-10-29 04:54:58,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-29 04:54:58,543 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:54:58,543 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:54:58,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-29 04:54:58,544 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:54:58,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:54:58,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1816809049, now seen corresponding path program 1 times [2021-10-29 04:54:58,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:54:58,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151019283] [2021-10-29 04:54:58,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:54:58,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:54:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:54:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:54:58,595 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:54:58,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151019283] [2021-10-29 04:54:58,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151019283] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 04:54:58,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621531448] [2021-10-29 04:54:58,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:54:58,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:54:58,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:54:58,600 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:54:58,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-29 04:54:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:54:58,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-29 04:54:58,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:54:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:54:58,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:54:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:54:58,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621531448] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 04:54:58,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1918000832] [2021-10-29 04:54:58,875 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-10-29 04:54:58,875 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 04:54:58,881 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 04:54:58,890 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 04:54:58,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 04:54:58,960 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:54:58,970 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:54:58,970 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:54:58,972 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 04:54:58,973 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:54:58,975 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:54:58,976 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 04:54:58,983 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-10-29 04:54:59,011 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-10-29 04:54:59,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:54:59,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:54:59,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:54:59,039 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 04:54:59,040 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:54:59,041 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 04:54:59,042 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:54:59,043 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 04:54:59,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 04:54:59,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:54:59,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:54:59,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:54:59,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:54:59,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:54:59,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:54:59,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:54:59,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:54:59,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:54:59,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:54:59,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:54:59,139 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 04:54:59,141 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:54:59,144 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 04:54:59,145 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:54:59,146 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 04:54:59,146 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 04:54:59,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:54:59,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:54:59,167 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:54:59,176 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-29 04:54:59,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 04:54:59,183 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:119 [2021-10-29 04:54:59,201 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:54:59,219 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-29 04:54:59,245 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:54:59,263 INFO L185 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 137 [2021-10-29 04:54:59,279 INFO L180 QuantifierPusher]: treesize reduction 7, result has 95.8 percent of original size [2021-10-29 04:54:59,296 INFO L185 QuantifierPusher]: treesize reduction 7, result has 95.4 percent of original size 144 [2021-10-29 04:54:59,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:54:59,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:54:59,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:54:59,497 INFO L180 QuantifierPusher]: treesize reduction 11, result has 97.1 percent of original size [2021-10-29 04:54:59,538 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 375 [2021-10-29 04:54:59,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:54:59,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:54:59,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:54:59,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:54:59,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:54:59,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:54:59,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:54:59,697 INFO L180 QuantifierPusher]: treesize reduction 49, result has 61.7 percent of original size [2021-10-29 04:54:59,708 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-10-29 04:54:59,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:54:59,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:54:59,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:54:59,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:54:59,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:54:59,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:54:59,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:54:59,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:54:59,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:54:59,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:54:59,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:54:59,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:00,014 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:00,021 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:00,028 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:00,052 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:00,057 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:00,062 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-29 04:55:00,067 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:00,072 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:00,081 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-10-29 04:55:00,095 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 374 [2021-10-29 04:55:00,109 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:00,116 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:00,122 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:00,123 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:00,126 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 04:55:00,128 INFO L185 QuantifierPusher]: treesize reduction 36, result has 56.6 percent of original size 47 [2021-10-29 04:55:00,133 INFO L185 QuantifierPusher]: treesize reduction 36, result has 63.3 percent of original size 62 [2021-10-29 04:55:00,140 INFO L180 QuantifierPusher]: treesize reduction 36, result has 70.5 percent of original size [2021-10-29 04:55:00,144 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 70 [2021-10-29 04:55:00,165 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:00,172 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 171 [2021-10-29 04:55:00,188 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:00,198 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 255 [2021-10-29 04:55:00,206 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 04:55:03,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1918000832] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:55:03,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-29 04:55:03,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [4, 4, 4] total 21 [2021-10-29 04:55:03,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972795013] [2021-10-29 04:55:03,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-29 04:55:03,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:55:03,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-29 04:55:03,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-10-29 04:55:03,069 INFO L87 Difference]: Start difference. First operand 52 states and 74 transitions. Second operand has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 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 04:55:03,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:55:03,847 INFO L93 Difference]: Finished difference Result 132 states and 189 transitions. [2021-10-29 04:55:03,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-29 04:55:03,856 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 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) Word has length 20 [2021-10-29 04:55:03,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:55:03,857 INFO L225 Difference]: With dead ends: 132 [2021-10-29 04:55:03,858 INFO L226 Difference]: Without dead ends: 77 [2021-10-29 04:55:03,859 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-10-29 04:55:03,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-29 04:55:03,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 49. [2021-10-29 04:55:03,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.4375) internal successors, (69), 48 states have internal predecessors, (69), 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 04:55:03,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 69 transitions. [2021-10-29 04:55:03,867 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 69 transitions. Word has length 20 [2021-10-29 04:55:03,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:55:03,868 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 69 transitions. [2021-10-29 04:55:03,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 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 04:55:03,868 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 69 transitions. [2021-10-29 04:55:03,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-29 04:55:03,869 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:55:03,869 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:55:03,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-29 04:55:04,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:55:04,084 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:55:04,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:55:04,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1656193896, now seen corresponding path program 1 times [2021-10-29 04:55:04,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:55:04,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91297471] [2021-10-29 04:55:04,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:55:04,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:55:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:55:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:55:04,195 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:55:04,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91297471] [2021-10-29 04:55:04,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91297471] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 04:55:04,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274939858] [2021-10-29 04:55:04,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:55:04,198 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:55:04,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:55:04,203 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:55:04,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-29 04:55:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:55:04,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-29 04:55:04,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:55:04,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-29 04:55:04,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:55:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-29 04:55:04,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274939858] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 04:55:04,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-29 04:55:04,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5] total 15 [2021-10-29 04:55:04,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922639465] [2021-10-29 04:55:04,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-29 04:55:04,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:55:04,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-29 04:55:04,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-10-29 04:55:04,735 INFO L87 Difference]: Start difference. First operand 49 states and 69 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 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 04:55:04,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:55:04,933 INFO L93 Difference]: Finished difference Result 71 states and 95 transitions. [2021-10-29 04:55:04,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-29 04:55:04,934 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 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 22 [2021-10-29 04:55:04,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:55:04,935 INFO L225 Difference]: With dead ends: 71 [2021-10-29 04:55:04,935 INFO L226 Difference]: Without dead ends: 63 [2021-10-29 04:55:04,936 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-10-29 04:55:04,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-29 04:55:04,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 49. [2021-10-29 04:55:04,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 48 states have internal predecessors, (67), 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 04:55:04,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2021-10-29 04:55:04,943 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 22 [2021-10-29 04:55:04,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:55:04,943 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2021-10-29 04:55:04,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 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 04:55:04,943 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2021-10-29 04:55:04,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-29 04:55:04,944 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:55:04,944 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:55:04,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-29 04:55:05,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-29 04:55:05,168 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:55:05,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:55:05,168 INFO L85 PathProgramCache]: Analyzing trace with hash -204531082, now seen corresponding path program 1 times [2021-10-29 04:55:05,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:55:05,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721109739] [2021-10-29 04:55:05,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:55:05,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:55:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:55:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:55:05,259 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:55:05,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721109739] [2021-10-29 04:55:05,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721109739] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 04:55:05,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426236606] [2021-10-29 04:55:05,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:55:05,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:55:05,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:55:05,266 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:55:05,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-29 04:55:05,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:55:05,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-29 04:55:05,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:55:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-29 04:55:05,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:55:05,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-29 04:55:05,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426236606] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 04:55:05,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-29 04:55:05,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [5] total 11 [2021-10-29 04:55:05,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226694912] [2021-10-29 04:55:05,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-29 04:55:05,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:55:05,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-29 04:55:05,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-29 04:55:05,679 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 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 04:55:05,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:55:05,816 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2021-10-29 04:55:05,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-29 04:55:05,817 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 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 23 [2021-10-29 04:55:05,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:55:05,818 INFO L225 Difference]: With dead ends: 76 [2021-10-29 04:55:05,818 INFO L226 Difference]: Without dead ends: 47 [2021-10-29 04:55:05,818 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-10-29 04:55:05,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-29 04:55:05,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-10-29 04:55:05,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 44 states have internal predecessors, (58), 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 04:55:05,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2021-10-29 04:55:05,824 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 23 [2021-10-29 04:55:05,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:55:05,824 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2021-10-29 04:55:05,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 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 04:55:05,825 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2021-10-29 04:55:05,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-29 04:55:05,825 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:55:05,826 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:55:05,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-29 04:55:06,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:55:06,026 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:55:06,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:55:06,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1266183059, now seen corresponding path program 1 times [2021-10-29 04:55:06,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:55:06,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051055516] [2021-10-29 04:55:06,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:55:06,027 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:55:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:55:06,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:55:06,083 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:55:06,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051055516] [2021-10-29 04:55:06,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051055516] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 04:55:06,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710314378] [2021-10-29 04:55:06,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:55:06,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:55:06,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:55:06,087 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:55:06,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-29 04:55:06,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:55:06,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-29 04:55:06,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:55:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:55:06,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:55:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:55:06,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710314378] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 04:55:06,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2077415458] [2021-10-29 04:55:06,452 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-10-29 04:55:06,453 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 04:55:06,453 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 04:55:06,453 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 04:55:06,453 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 04:55:06,489 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:06,491 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:06,491 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:06,492 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 04:55:06,492 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:06,493 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:06,493 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 04:55:06,495 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-10-29 04:55:06,510 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-10-29 04:55:06,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:06,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:06,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:06,522 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 04:55:06,522 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:06,523 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 04:55:06,523 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:06,524 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 04:55:06,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 04:55:06,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:06,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:06,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:06,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:06,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:06,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:06,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:06,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:06,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:06,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:06,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:06,554 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 04:55:06,555 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:06,557 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 04:55:06,557 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:06,558 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 04:55:06,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 04:55:06,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:06,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:06,577 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:06,579 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-29 04:55:06,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 04:55:06,580 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:119 [2021-10-29 04:55:06,586 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:06,590 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-29 04:55:06,600 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:06,610 INFO L185 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 137 [2021-10-29 04:55:06,618 INFO L180 QuantifierPusher]: treesize reduction 7, result has 95.8 percent of original size [2021-10-29 04:55:06,622 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 149 [2021-10-29 04:55:06,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:06,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:06,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:06,692 INFO L180 QuantifierPusher]: treesize reduction 6, result has 98.4 percent of original size [2021-10-29 04:55:06,702 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 372 [2021-10-29 04:55:06,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:06,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:06,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:06,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:06,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:06,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:06,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:06,781 INFO L180 QuantifierPusher]: treesize reduction 49, result has 61.7 percent of original size [2021-10-29 04:55:06,784 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-10-29 04:55:06,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:06,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:06,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:06,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:06,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:06,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:06,868 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:06,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:06,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:06,915 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:06,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:06,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:06,968 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:06,970 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:06,974 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:06,990 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:06,992 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:06,995 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-29 04:55:06,998 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:07,001 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:07,006 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-10-29 04:55:07,014 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 374 [2021-10-29 04:55:07,022 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:07,024 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:07,028 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:07,029 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:07,030 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 04:55:07,032 INFO L185 QuantifierPusher]: treesize reduction 36, result has 56.6 percent of original size 47 [2021-10-29 04:55:07,036 INFO L185 QuantifierPusher]: treesize reduction 36, result has 63.3 percent of original size 62 [2021-10-29 04:55:07,047 INFO L180 QuantifierPusher]: treesize reduction 44, result has 63.3 percent of original size [2021-10-29 04:55:07,050 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-10-29 04:55:07,053 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:07,056 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-10-29 04:55:07,067 INFO L180 QuantifierPusher]: treesize reduction 8, result has 91.5 percent of original size [2021-10-29 04:55:07,069 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-29 04:55:07,074 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:07,078 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-10-29 04:55:07,128 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:07,137 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 340 [2021-10-29 04:55:07,143 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 04:55:14,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2077415458] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:55:14,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-29 04:55:14,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [4, 4, 4] total 27 [2021-10-29 04:55:14,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169582934] [2021-10-29 04:55:14,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-29 04:55:14,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:55:14,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-29 04:55:14,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-10-29 04:55:14,925 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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 04:55:16,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:55:16,377 INFO L93 Difference]: Finished difference Result 98 states and 122 transitions. [2021-10-29 04:55:16,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-29 04:55:16,378 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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 29 [2021-10-29 04:55:16,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:55:16,379 INFO L225 Difference]: With dead ends: 98 [2021-10-29 04:55:16,379 INFO L226 Difference]: Without dead ends: 90 [2021-10-29 04:55:16,380 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-10-29 04:55:16,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-29 04:55:16,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2021-10-29 04:55:16,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 62 states have internal predecessors, (80), 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 04:55:16,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2021-10-29 04:55:16,390 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 29 [2021-10-29 04:55:16,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:55:16,391 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2021-10-29 04:55:16,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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 04:55:16,391 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2021-10-29 04:55:16,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-29 04:55:16,392 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:55:16,392 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:55:16,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-29 04:55:16,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:55:16,608 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:55:16,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:55:16,608 INFO L85 PathProgramCache]: Analyzing trace with hash 481798449, now seen corresponding path program 1 times [2021-10-29 04:55:16,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:55:16,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200720160] [2021-10-29 04:55:16,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:55:16,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:55:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:55:16,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:55:16,649 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:55:16,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200720160] [2021-10-29 04:55:16,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200720160] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 04:55:16,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139210886] [2021-10-29 04:55:16,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:55:16,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:55:16,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:55:16,650 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:55:16,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-29 04:55:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:55:16,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-29 04:55:16,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:55:16,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:55:16,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:55:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:55:16,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139210886] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 04:55:16,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [421332185] [2021-10-29 04:55:16,997 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-10-29 04:55:16,998 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 04:55:16,998 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 04:55:16,998 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 04:55:16,998 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 04:55:17,025 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:17,026 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:17,027 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:17,028 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 04:55:17,028 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:17,029 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:17,029 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 04:55:17,032 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-10-29 04:55:17,037 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 21=[|v_#valid_12|]} [2021-10-29 04:55:17,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:17,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:17,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:17,048 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 04:55:17,048 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:17,048 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 04:55:17,049 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:17,049 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 04:55:17,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 04:55:17,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:17,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:17,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:17,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:17,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:17,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:17,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:17,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:17,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:17,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:17,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:17,085 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 04:55:17,086 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:17,088 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 04:55:17,100 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:17,100 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 04:55:17,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 04:55:17,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:17,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:17,106 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:17,108 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-29 04:55:17,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 04:55:17,109 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:119 [2021-10-29 04:55:17,124 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:17,128 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-29 04:55:17,150 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:17,153 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-10-29 04:55:17,158 INFO L180 QuantifierPusher]: treesize reduction 7, result has 95.8 percent of original size [2021-10-29 04:55:17,164 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 149 [2021-10-29 04:55:17,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:17,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:17,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:17,234 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:17,255 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 391 [2021-10-29 04:55:17,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:17,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:17,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:17,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:17,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:17,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:17,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:17,327 INFO L180 QuantifierPusher]: treesize reduction 49, result has 61.7 percent of original size [2021-10-29 04:55:17,330 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-10-29 04:55:17,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:17,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:17,355 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:17,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:17,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:17,395 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:17,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:17,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:17,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:17,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:17,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:17,462 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:17,491 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:17,493 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:17,496 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:17,511 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:17,513 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:17,531 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-29 04:55:17,534 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:17,536 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:17,541 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-10-29 04:55:17,546 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 374 [2021-10-29 04:55:17,553 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:17,555 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:17,557 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:17,558 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:17,560 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 04:55:17,561 INFO L185 QuantifierPusher]: treesize reduction 36, result has 56.6 percent of original size 47 [2021-10-29 04:55:17,564 INFO L185 QuantifierPusher]: treesize reduction 36, result has 63.3 percent of original size 62 [2021-10-29 04:55:17,574 INFO L180 QuantifierPusher]: treesize reduction 44, result has 63.3 percent of original size [2021-10-29 04:55:17,576 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-10-29 04:55:17,579 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:17,582 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-10-29 04:55:17,595 INFO L180 QuantifierPusher]: treesize reduction 10, result has 94.9 percent of original size [2021-10-29 04:55:17,599 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 178 [2021-10-29 04:55:17,627 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:17,633 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 343 [2021-10-29 04:55:17,638 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 04:55:22,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [421332185] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:55:22,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-29 04:55:22,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [4, 4, 4] total 27 [2021-10-29 04:55:22,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356108384] [2021-10-29 04:55:22,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-29 04:55:22,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:55:22,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-29 04:55:22,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2021-10-29 04:55:22,795 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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 04:55:23,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:55:23,722 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2021-10-29 04:55:23,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-29 04:55:23,722 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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 29 [2021-10-29 04:55:23,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:55:23,724 INFO L225 Difference]: With dead ends: 88 [2021-10-29 04:55:23,724 INFO L226 Difference]: Without dead ends: 70 [2021-10-29 04:55:23,724 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-10-29 04:55:23,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-29 04:55:23,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2021-10-29 04:55:23,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 63 states have internal predecessors, (81), 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 04:55:23,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2021-10-29 04:55:23,732 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 29 [2021-10-29 04:55:23,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:55:23,733 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2021-10-29 04:55:23,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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 04:55:23,733 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2021-10-29 04:55:23,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-29 04:55:23,734 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:55:23,734 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:55:23,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-29 04:55:23,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-10-29 04:55:23,956 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:55:23,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:55:23,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1247934927, now seen corresponding path program 1 times [2021-10-29 04:55:23,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:55:23,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460993822] [2021-10-29 04:55:23,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:55:23,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:55:23,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:55:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:55:24,021 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:55:24,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460993822] [2021-10-29 04:55:24,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460993822] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 04:55:24,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789137056] [2021-10-29 04:55:24,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:55:24,022 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:55:24,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:55:24,030 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:55:24,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-29 04:55:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:55:24,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-29 04:55:24,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:55:24,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:55:24,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:55:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:55:24,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789137056] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 04:55:24,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1174862619] [2021-10-29 04:55:24,345 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-10-29 04:55:24,345 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 04:55:24,345 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 04:55:24,345 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 04:55:24,346 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 04:55:24,366 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:24,367 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:24,368 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:24,368 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 04:55:24,369 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:24,369 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:24,369 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 04:55:24,371 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-10-29 04:55:24,376 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_12|], 21=[|v_#valid_13|]} [2021-10-29 04:55:24,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:24,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:24,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:24,387 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 04:55:24,387 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:24,388 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 04:55:24,388 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:24,389 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 04:55:24,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 04:55:24,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:24,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:24,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:24,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:24,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:24,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:24,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:24,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:24,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:24,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:24,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:24,414 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 04:55:24,415 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:24,418 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 04:55:24,419 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:24,419 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 04:55:24,420 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 04:55:24,420 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:24,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:24,428 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:24,430 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-29 04:55:24,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 04:55:24,431 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:119 [2021-10-29 04:55:24,437 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:24,443 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-29 04:55:24,453 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:24,459 INFO L185 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 137 [2021-10-29 04:55:24,463 INFO L180 QuantifierPusher]: treesize reduction 7, result has 95.8 percent of original size [2021-10-29 04:55:24,466 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 149 [2021-10-29 04:55:24,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:24,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:24,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:24,531 INFO L180 QuantifierPusher]: treesize reduction 6, result has 98.4 percent of original size [2021-10-29 04:55:24,543 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 372 [2021-10-29 04:55:24,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:24,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:24,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:24,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:24,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:24,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:24,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:24,618 INFO L180 QuantifierPusher]: treesize reduction 49, result has 61.7 percent of original size [2021-10-29 04:55:24,620 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 76 [2021-10-29 04:55:24,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:24,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:24,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:24,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:24,704 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:24,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:24,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:24,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:24,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:24,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:24,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:24,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:24,809 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:24,812 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:24,817 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:24,833 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:24,835 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:24,841 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-29 04:55:24,845 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:24,847 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:24,854 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-10-29 04:55:24,860 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 374 [2021-10-29 04:55:24,867 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:24,869 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:24,872 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:24,873 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:24,874 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 04:55:24,876 INFO L185 QuantifierPusher]: treesize reduction 36, result has 56.6 percent of original size 47 [2021-10-29 04:55:24,878 INFO L185 QuantifierPusher]: treesize reduction 36, result has 63.3 percent of original size 62 [2021-10-29 04:55:24,890 INFO L180 QuantifierPusher]: treesize reduction 48, result has 65.0 percent of original size [2021-10-29 04:55:24,893 INFO L185 QuantifierPusher]: treesize reduction 5, result has 93.2 percent of original size 68 [2021-10-29 04:55:24,903 INFO L180 QuantifierPusher]: treesize reduction 13, result has 86.3 percent of original size [2021-10-29 04:55:24,905 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-10-29 04:55:24,912 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:24,915 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 171 [2021-10-29 04:55:24,944 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:24,950 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-10-29 04:55:24,962 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 04:55:28,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1174862619] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:55:28,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-29 04:55:28,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [4, 4, 4] total 27 [2021-10-29 04:55:28,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334382918] [2021-10-29 04:55:28,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-29 04:55:28,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:55:28,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-29 04:55:28,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-10-29 04:55:28,691 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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 04:55:29,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:55:29,624 INFO L93 Difference]: Finished difference Result 110 states and 136 transitions. [2021-10-29 04:55:29,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-29 04:55:29,624 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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 29 [2021-10-29 04:55:29,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:55:29,625 INFO L225 Difference]: With dead ends: 110 [2021-10-29 04:55:29,625 INFO L226 Difference]: Without dead ends: 102 [2021-10-29 04:55:29,626 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-10-29 04:55:29,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-29 04:55:29,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 70. [2021-10-29 04:55:29,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.3043478260869565) internal successors, (90), 69 states have internal predecessors, (90), 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 04:55:29,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2021-10-29 04:55:29,635 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 29 [2021-10-29 04:55:29,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:55:29,636 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2021-10-29 04:55:29,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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 04:55:29,636 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2021-10-29 04:55:29,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-29 04:55:29,637 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:55:29,637 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:55:29,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-29 04:55:29,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:55:29,852 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:55:29,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:55:29,852 INFO L85 PathProgramCache]: Analyzing trace with hash 500046581, now seen corresponding path program 1 times [2021-10-29 04:55:29,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:55:29,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765785036] [2021-10-29 04:55:29,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:55:29,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:55:29,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:55:29,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:55:29,895 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:55:29,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765785036] [2021-10-29 04:55:29,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765785036] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 04:55:29,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543593916] [2021-10-29 04:55:29,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:55:29,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:55:29,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:55:29,907 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:55:29,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-29 04:55:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:55:30,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-29 04:55:30,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:55:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:55:30,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:55:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:55:30,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543593916] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 04:55:30,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [905682112] [2021-10-29 04:55:30,246 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-10-29 04:55:30,246 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 04:55:30,247 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 04:55:30,247 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 04:55:30,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 04:55:30,259 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:30,260 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:30,260 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:30,261 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 04:55:30,261 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:30,262 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:30,262 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 04:55:30,264 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-10-29 04:55:30,266 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 21=[|v_#valid_14|]} [2021-10-29 04:55:30,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:30,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:30,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:30,278 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 04:55:30,279 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:30,279 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 04:55:30,280 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:30,280 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 04:55:30,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 04:55:30,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:30,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:30,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:30,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:30,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:30,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:30,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:30,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:30,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:30,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:30,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:30,303 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 04:55:30,304 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:30,307 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 04:55:30,308 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:30,308 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 04:55:30,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 04:55:30,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:30,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:30,315 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:30,316 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-29 04:55:30,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 04:55:30,317 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:119 [2021-10-29 04:55:30,325 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:30,329 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-29 04:55:30,344 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:30,349 INFO L185 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 137 [2021-10-29 04:55:30,356 INFO L180 QuantifierPusher]: treesize reduction 7, result has 95.8 percent of original size [2021-10-29 04:55:30,361 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 149 [2021-10-29 04:55:30,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:30,384 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:30,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:30,434 INFO L180 QuantifierPusher]: treesize reduction 6, result has 98.4 percent of original size [2021-10-29 04:55:30,444 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 372 [2021-10-29 04:55:30,451 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:30,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:30,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:30,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:30,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:30,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:30,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:30,517 INFO L180 QuantifierPusher]: treesize reduction 49, result has 61.7 percent of original size [2021-10-29 04:55:30,519 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-10-29 04:55:30,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:30,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:30,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:30,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:30,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:30,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:30,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:30,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:30,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:30,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:30,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:30,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:30,692 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:30,694 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:30,697 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:30,712 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:30,714 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:30,718 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-29 04:55:30,720 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:30,722 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:30,729 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-10-29 04:55:30,747 INFO L185 QuantifierPusher]: treesize reduction 39, result has 87.5 percent of original size 273 [2021-10-29 04:55:30,754 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:30,756 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:30,759 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:30,760 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:30,761 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 04:55:30,763 INFO L185 QuantifierPusher]: treesize reduction 36, result has 56.6 percent of original size 47 [2021-10-29 04:55:30,765 INFO L185 QuantifierPusher]: treesize reduction 36, result has 63.3 percent of original size 62 [2021-10-29 04:55:30,778 INFO L180 QuantifierPusher]: treesize reduction 48, result has 65.0 percent of original size [2021-10-29 04:55:30,780 INFO L185 QuantifierPusher]: treesize reduction 5, result has 93.2 percent of original size 68 [2021-10-29 04:55:30,794 INFO L180 QuantifierPusher]: treesize reduction 15, result has 92.3 percent of original size [2021-10-29 04:55:30,798 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 174 [2021-10-29 04:55:30,818 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:30,824 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 339 [2021-10-29 04:55:30,828 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 04:55:34,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [905682112] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:55:34,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-29 04:55:34,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [4, 4, 4] total 27 [2021-10-29 04:55:34,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855694946] [2021-10-29 04:55:34,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-29 04:55:34,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:55:34,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-29 04:55:34,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2021-10-29 04:55:34,328 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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 04:55:34,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:55:34,921 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2021-10-29 04:55:34,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-29 04:55:34,921 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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 29 [2021-10-29 04:55:34,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:55:34,922 INFO L225 Difference]: With dead ends: 91 [2021-10-29 04:55:34,922 INFO L226 Difference]: Without dead ends: 76 [2021-10-29 04:55:34,923 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-10-29 04:55:34,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-29 04:55:34,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 65. [2021-10-29 04:55:34,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.296875) internal successors, (83), 64 states have internal predecessors, (83), 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 04:55:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 83 transitions. [2021-10-29 04:55:34,931 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 83 transitions. Word has length 29 [2021-10-29 04:55:34,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:55:34,931 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 83 transitions. [2021-10-29 04:55:34,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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 04:55:34,931 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 83 transitions. [2021-10-29 04:55:34,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-29 04:55:34,932 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:55:34,933 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:55:34,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-29 04:55:35,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:55:35,140 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:55:35,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:55:35,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1153373444, now seen corresponding path program 1 times [2021-10-29 04:55:35,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:55:35,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808473656] [2021-10-29 04:55:35,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:55:35,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:55:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:55:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:55:35,168 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:55:35,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808473656] [2021-10-29 04:55:35,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808473656] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 04:55:35,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575144151] [2021-10-29 04:55:35,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:55:35,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:55:35,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:55:35,180 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:55:35,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-29 04:55:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:55:35,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-29 04:55:35,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:55:35,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:55:35,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:55:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:55:35,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575144151] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 04:55:35,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [507497639] [2021-10-29 04:55:35,545 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-10-29 04:55:35,545 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 04:55:35,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 04:55:35,545 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 04:55:35,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 04:55:35,562 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:35,563 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:35,564 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:35,564 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 04:55:35,565 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:35,565 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:35,566 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 04:55:35,569 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-10-29 04:55:35,572 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_14|], 21=[|v_#valid_15|]} [2021-10-29 04:55:35,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:35,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:35,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:35,590 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 04:55:35,590 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:35,591 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 04:55:35,591 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:35,592 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 04:55:35,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 04:55:35,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:35,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:35,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:35,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:35,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:35,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:35,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:35,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:35,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:35,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:35,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:35,616 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 04:55:35,616 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:35,618 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 04:55:35,619 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:35,619 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 04:55:35,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 04:55:35,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:35,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:35,625 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:35,626 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-29 04:55:35,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 04:55:35,627 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:119 [2021-10-29 04:55:35,634 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:35,638 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-29 04:55:35,652 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:35,655 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-10-29 04:55:35,659 INFO L180 QuantifierPusher]: treesize reduction 7, result has 95.8 percent of original size [2021-10-29 04:55:35,663 INFO L185 QuantifierPusher]: treesize reduction 7, result has 95.4 percent of original size 144 [2021-10-29 04:55:35,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:35,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:35,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:35,719 INFO L180 QuantifierPusher]: treesize reduction 5, result has 98.7 percent of original size [2021-10-29 04:55:35,728 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 381 [2021-10-29 04:55:35,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:35,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:35,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:35,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:35,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:35,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:35,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:35,789 INFO L180 QuantifierPusher]: treesize reduction 49, result has 61.7 percent of original size [2021-10-29 04:55:35,791 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-10-29 04:55:35,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:35,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:35,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:35,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:35,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:35,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:35,868 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:35,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:35,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:35,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:35,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:35,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:35,956 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:35,961 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:35,965 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:35,985 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:35,987 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:35,989 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-29 04:55:35,993 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:35,997 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:36,002 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-10-29 04:55:36,014 INFO L185 QuantifierPusher]: treesize reduction 39, result has 87.5 percent of original size 273 [2021-10-29 04:55:36,023 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:36,026 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:36,029 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:36,030 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:36,032 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 04:55:36,034 INFO L185 QuantifierPusher]: treesize reduction 36, result has 56.6 percent of original size 47 [2021-10-29 04:55:36,036 INFO L185 QuantifierPusher]: treesize reduction 36, result has 63.3 percent of original size 62 [2021-10-29 04:55:36,047 INFO L180 QuantifierPusher]: treesize reduction 44, result has 63.3 percent of original size [2021-10-29 04:55:36,049 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-10-29 04:55:36,056 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:36,060 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-10-29 04:55:36,066 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:36,068 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-10-29 04:55:36,073 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:36,077 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-10-29 04:55:36,081 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:36,085 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 192 [2021-10-29 04:55:36,116 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:36,130 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 357 [2021-10-29 04:55:36,137 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 04:55:47,316 WARN L207 SmtUtils]: Spent 5.26 s on a formula simplification. DAG size of input: 134 DAG size of output: 116 [2021-10-29 04:55:51,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [507497639] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:55:51,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-29 04:55:51,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [4, 4, 4] total 28 [2021-10-29 04:55:51,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896422038] [2021-10-29 04:55:51,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-29 04:55:51,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:55:51,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-29 04:55:51,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-10-29 04:55:51,213 INFO L87 Difference]: Start difference. First operand 65 states and 83 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 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 04:55:52,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:55:52,723 INFO L93 Difference]: Finished difference Result 101 states and 124 transitions. [2021-10-29 04:55:52,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-29 04:55:52,724 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 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 04:55:52,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:55:52,725 INFO L225 Difference]: With dead ends: 101 [2021-10-29 04:55:52,725 INFO L226 Difference]: Without dead ends: 93 [2021-10-29 04:55:52,726 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-10-29 04:55:52,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-29 04:55:52,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2021-10-29 04:55:52,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.3) internal successors, (91), 70 states have internal predecessors, (91), 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 04:55:52,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2021-10-29 04:55:52,735 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 30 [2021-10-29 04:55:52,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:55:52,735 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2021-10-29 04:55:52,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 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 04:55:52,735 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2021-10-29 04:55:52,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-29 04:55:52,736 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:55:52,737 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:55:52,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-29 04:55:52,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:55:52,952 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:55:52,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:55:52,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1719065536, now seen corresponding path program 1 times [2021-10-29 04:55:52,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:55:52,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043820900] [2021-10-29 04:55:52,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:55:52,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:55:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:55:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:55:52,995 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:55:52,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043820900] [2021-10-29 04:55:52,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043820900] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 04:55:52,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761754336] [2021-10-29 04:55:52,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:55:52,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:55:52,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:55:52,997 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:55:53,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-29 04:55:53,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:55:53,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-29 04:55:53,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:55:53,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:55:53,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:55:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:55:53,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761754336] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 04:55:53,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [513803548] [2021-10-29 04:55:53,317 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-10-29 04:55:53,317 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 04:55:53,318 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 04:55:53,318 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 04:55:53,318 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 04:55:53,337 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:53,338 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:53,338 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:53,339 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 04:55:53,339 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:53,340 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:53,340 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 04:55:53,346 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-10-29 04:55:53,350 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_15|], 21=[|v_#valid_16|]} [2021-10-29 04:55:53,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:53,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:53,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:53,365 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 04:55:53,365 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:53,366 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 04:55:53,366 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:53,366 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 04:55:53,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 04:55:53,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:53,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:53,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:53,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:53,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:53,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:53,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:53,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:53,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:53,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:53,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:55:53,390 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 04:55:53,391 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:53,400 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 04:55:53,400 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:53,401 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 04:55:53,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 04:55:53,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:53,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:53,408 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:53,409 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-29 04:55:53,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 04:55:53,410 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:119 [2021-10-29 04:55:53,419 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:53,431 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-29 04:55:53,444 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:53,454 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-10-29 04:55:53,458 INFO L180 QuantifierPusher]: treesize reduction 7, result has 95.8 percent of original size [2021-10-29 04:55:53,462 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 149 [2021-10-29 04:55:53,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:53,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:53,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:53,511 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:53,520 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 386 [2021-10-29 04:55:53,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:53,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:53,566 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:53,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:53,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:53,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:53,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:53,587 INFO L180 QuantifierPusher]: treesize reduction 49, result has 61.7 percent of original size [2021-10-29 04:55:53,589 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-10-29 04:55:53,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:53,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:53,614 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:53,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:53,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:53,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:53,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:53,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:53,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:53,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:53,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:53,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:55:53,710 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:53,713 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:53,716 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:53,734 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:53,736 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:53,738 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-29 04:55:53,741 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:53,743 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:53,748 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-10-29 04:55:53,759 INFO L185 QuantifierPusher]: treesize reduction 39, result has 87.5 percent of original size 273 [2021-10-29 04:55:53,765 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:53,767 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:53,770 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:55:53,771 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:53,775 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 04:55:53,777 INFO L185 QuantifierPusher]: treesize reduction 36, result has 56.6 percent of original size 47 [2021-10-29 04:55:53,779 INFO L185 QuantifierPusher]: treesize reduction 36, result has 63.3 percent of original size 62 [2021-10-29 04:55:53,789 INFO L180 QuantifierPusher]: treesize reduction 48, result has 65.0 percent of original size [2021-10-29 04:55:53,795 INFO L185 QuantifierPusher]: treesize reduction 5, result has 93.2 percent of original size 68 [2021-10-29 04:55:53,801 INFO L180 QuantifierPusher]: treesize reduction 6, result has 94.1 percent of original size [2021-10-29 04:55:53,803 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-10-29 04:55:53,811 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:53,814 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-10-29 04:55:53,819 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:53,822 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-10-29 04:55:53,852 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:55:53,858 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 352 [2021-10-29 04:55:53,864 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 04:55:59,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [513803548] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:55:59,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-29 04:55:59,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [4, 4, 4] total 28 [2021-10-29 04:55:59,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003093960] [2021-10-29 04:55:59,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-29 04:55:59,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:55:59,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-29 04:55:59,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-10-29 04:55:59,199 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 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 04:56:00,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:56:00,239 INFO L93 Difference]: Finished difference Result 104 states and 128 transitions. [2021-10-29 04:56:00,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-29 04:56:00,240 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 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 04:56:00,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:56:00,241 INFO L225 Difference]: With dead ends: 104 [2021-10-29 04:56:00,241 INFO L226 Difference]: Without dead ends: 96 [2021-10-29 04:56:00,241 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-10-29 04:56:00,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-29 04:56:00,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2021-10-29 04:56:00,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2985074626865671) internal successors, (87), 67 states have internal predecessors, (87), 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 04:56:00,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2021-10-29 04:56:00,248 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 30 [2021-10-29 04:56:00,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:56:00,248 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2021-10-29 04:56:00,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 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 04:56:00,248 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2021-10-29 04:56:00,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-29 04:56:00,249 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:56:00,249 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:56:00,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-29 04:56:00,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-10-29 04:56:00,455 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:56:00,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:56:00,455 INFO L85 PathProgramCache]: Analyzing trace with hash -284157171, now seen corresponding path program 1 times [2021-10-29 04:56:00,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:56:00,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595410169] [2021-10-29 04:56:00,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:56:00,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:56:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:56:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:56:00,488 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:56:00,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595410169] [2021-10-29 04:56:00,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595410169] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 04:56:00,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240018611] [2021-10-29 04:56:00,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:56:00,489 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:56:00,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:56:00,498 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:56:00,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-29 04:56:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:56:00,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-29 04:56:00,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:56:00,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:56:00,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:56:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:56:00,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240018611] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 04:56:00,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [365924017] [2021-10-29 04:56:00,858 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-10-29 04:56:00,858 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 04:56:00,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 04:56:00,858 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 04:56:00,859 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 04:56:00,871 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:00,872 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:56:00,873 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:00,874 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 04:56:00,874 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:56:00,877 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:00,877 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 04:56:00,879 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-10-29 04:56:00,882 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_16|], 21=[|v_#valid_17|]} [2021-10-29 04:56:00,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:00,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:00,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:00,897 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 04:56:00,897 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:00,898 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 04:56:00,898 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:00,899 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 04:56:00,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 04:56:00,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:00,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:00,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:00,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:00,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:00,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:00,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:00,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:00,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:00,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:00,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:00,929 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 04:56:00,932 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:00,935 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 04:56:00,936 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:00,936 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 04:56:00,936 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 04:56:00,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:00,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:00,941 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:00,943 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-29 04:56:00,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 04:56:00,944 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:119 [2021-10-29 04:56:00,952 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:00,955 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-29 04:56:00,967 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:00,970 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-10-29 04:56:00,973 INFO L180 QuantifierPusher]: treesize reduction 7, result has 95.8 percent of original size [2021-10-29 04:56:00,977 INFO L185 QuantifierPusher]: treesize reduction 7, result has 95.4 percent of original size 144 [2021-10-29 04:56:00,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:00,987 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:00,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:01,016 INFO L180 QuantifierPusher]: treesize reduction 5, result has 98.7 percent of original size [2021-10-29 04:56:01,026 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 381 [2021-10-29 04:56:01,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:01,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:01,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:01,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:01,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:01,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:01,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:01,083 INFO L180 QuantifierPusher]: treesize reduction 49, result has 61.7 percent of original size [2021-10-29 04:56:01,085 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-10-29 04:56:01,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:01,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:01,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:01,124 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:01,135 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:01,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:01,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:01,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:01,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:01,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:01,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:01,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:01,210 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:01,211 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:56:01,213 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:01,223 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:56:01,224 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:01,226 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-29 04:56:01,227 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:56:01,230 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:01,237 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-10-29 04:56:01,241 INFO L185 QuantifierPusher]: treesize reduction 39, result has 87.5 percent of original size 273 [2021-10-29 04:56:01,250 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:56:01,252 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:01,255 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:56:01,256 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:01,258 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 04:56:01,259 INFO L185 QuantifierPusher]: treesize reduction 36, result has 56.6 percent of original size 47 [2021-10-29 04:56:01,262 INFO L185 QuantifierPusher]: treesize reduction 36, result has 63.3 percent of original size 62 [2021-10-29 04:56:01,271 INFO L180 QuantifierPusher]: treesize reduction 37, result has 70.6 percent of original size [2021-10-29 04:56:01,273 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-29 04:56:01,287 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:01,291 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-10-29 04:56:01,296 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:01,301 INFO L185 QuantifierPusher]: treesize reduction 6, result has 93.0 percent of original size 80 [2021-10-29 04:56:01,316 INFO L180 QuantifierPusher]: treesize reduction 14, result has 87.0 percent of original size [2021-10-29 04:56:01,318 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-10-29 04:56:01,325 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:01,328 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 183 [2021-10-29 04:56:01,388 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:01,394 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 348 [2021-10-29 04:56:01,399 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 04:56:15,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [365924017] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:56:15,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-29 04:56:15,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [4, 4, 4] total 28 [2021-10-29 04:56:15,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705550922] [2021-10-29 04:56:15,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-29 04:56:15,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:56:15,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-29 04:56:15,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-10-29 04:56:15,744 INFO L87 Difference]: Start difference. First operand 68 states and 87 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 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 04:56:17,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:56:17,442 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2021-10-29 04:56:17,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-29 04:56:17,443 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 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 04:56:17,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:56:17,444 INFO L225 Difference]: With dead ends: 118 [2021-10-29 04:56:17,444 INFO L226 Difference]: Without dead ends: 110 [2021-10-29 04:56:17,444 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-10-29 04:56:17,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-29 04:56:17,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 77. [2021-10-29 04:56:17,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.3026315789473684) internal successors, (99), 76 states have internal predecessors, (99), 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 04:56:17,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 99 transitions. [2021-10-29 04:56:17,455 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 99 transitions. Word has length 30 [2021-10-29 04:56:17,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:56:17,455 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 99 transitions. [2021-10-29 04:56:17,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 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 04:56:17,455 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 99 transitions. [2021-10-29 04:56:17,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-29 04:56:17,456 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:56:17,456 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:56:17,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-29 04:56:17,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-10-29 04:56:17,657 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:56:17,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:56:17,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1463824337, now seen corresponding path program 1 times [2021-10-29 04:56:17,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:56:17,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637930923] [2021-10-29 04:56:17,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:56:17,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:56:17,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:56:17,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:56:17,712 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:56:17,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637930923] [2021-10-29 04:56:17,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637930923] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 04:56:17,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209155963] [2021-10-29 04:56:17,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:56:17,713 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:56:17,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:56:17,714 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:56:17,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-29 04:56:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:56:17,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-29 04:56:17,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:56:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:56:17,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:56:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:56:18,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209155963] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 04:56:18,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [788956206] [2021-10-29 04:56:18,085 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-10-29 04:56:18,085 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 04:56:18,086 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 04:56:18,086 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 04:56:18,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 04:56:18,096 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:18,096 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:56:18,098 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:18,098 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 04:56:18,099 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:56:18,099 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:18,099 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 04:56:18,101 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-10-29 04:56:18,104 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_17|], 21=[|v_#valid_18|]} [2021-10-29 04:56:18,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:18,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:18,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:18,119 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 04:56:18,119 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:18,120 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 04:56:18,120 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:18,120 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 04:56:18,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 04:56:18,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:18,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:18,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:18,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:18,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:18,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:18,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:18,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:18,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:18,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:18,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:18,147 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 04:56:18,148 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:18,150 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 04:56:18,151 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:18,151 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 04:56:18,151 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 04:56:18,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:18,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:18,155 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:18,156 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-29 04:56:18,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 04:56:18,157 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:119 [2021-10-29 04:56:18,165 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:18,169 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-29 04:56:18,185 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:18,188 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-10-29 04:56:18,192 INFO L180 QuantifierPusher]: treesize reduction 7, result has 95.8 percent of original size [2021-10-29 04:56:18,195 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 149 [2021-10-29 04:56:18,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:18,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:18,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:18,242 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:18,252 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 386 [2021-10-29 04:56:18,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:18,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:18,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:18,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:18,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:18,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:18,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:18,312 INFO L180 QuantifierPusher]: treesize reduction 49, result has 61.7 percent of original size [2021-10-29 04:56:18,314 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-10-29 04:56:18,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:18,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:18,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:18,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:18,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:18,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:18,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:18,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:18,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:18,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:18,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:18,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:18,458 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:18,459 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:56:18,464 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:18,473 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:56:18,488 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:18,490 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-29 04:56:18,493 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:56:18,494 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:18,499 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-10-29 04:56:18,506 INFO L185 QuantifierPusher]: treesize reduction 39, result has 87.5 percent of original size 273 [2021-10-29 04:56:18,512 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:56:18,514 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:18,516 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:56:18,517 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:18,519 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 04:56:18,520 INFO L185 QuantifierPusher]: treesize reduction 36, result has 56.6 percent of original size 47 [2021-10-29 04:56:18,522 INFO L185 QuantifierPusher]: treesize reduction 36, result has 63.3 percent of original size 62 [2021-10-29 04:56:18,531 INFO L180 QuantifierPusher]: treesize reduction 37, result has 70.6 percent of original size [2021-10-29 04:56:18,533 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-29 04:56:18,542 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:18,544 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-10-29 04:56:18,548 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:18,551 INFO L185 QuantifierPusher]: treesize reduction 6, result has 93.0 percent of original size 80 [2021-10-29 04:56:18,571 INFO L180 QuantifierPusher]: treesize reduction 16, result has 92.3 percent of original size [2021-10-29 04:56:18,575 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 186 [2021-10-29 04:56:18,607 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:18,632 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 351 [2021-10-29 04:56:18,637 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 04:56:26,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [788956206] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:56:26,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-29 04:56:26,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [4, 4, 4] total 28 [2021-10-29 04:56:26,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357572022] [2021-10-29 04:56:26,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-29 04:56:26,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:56:26,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-29 04:56:26,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2021-10-29 04:56:26,374 INFO L87 Difference]: Start difference. First operand 77 states and 99 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 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 04:56:27,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:56:27,740 INFO L93 Difference]: Finished difference Result 102 states and 128 transitions. [2021-10-29 04:56:27,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-29 04:56:27,741 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 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 04:56:27,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:56:27,741 INFO L225 Difference]: With dead ends: 102 [2021-10-29 04:56:27,742 INFO L226 Difference]: Without dead ends: 84 [2021-10-29 04:56:27,742 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-10-29 04:56:27,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-29 04:56:27,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2021-10-29 04:56:27,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.2972972972972974) internal successors, (96), 74 states have internal predecessors, (96), 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 04:56:27,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2021-10-29 04:56:27,752 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 30 [2021-10-29 04:56:27,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:56:27,752 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2021-10-29 04:56:27,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 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 04:56:27,753 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2021-10-29 04:56:27,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-29 04:56:27,753 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:56:27,753 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:56:27,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-29 04:56:27,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:56:27,976 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:56:27,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:56:27,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1531404900, now seen corresponding path program 1 times [2021-10-29 04:56:27,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:56:27,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263540526] [2021-10-29 04:56:27,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:56:27,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:56:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:56:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:56:28,011 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:56:28,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263540526] [2021-10-29 04:56:28,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263540526] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 04:56:28,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935488516] [2021-10-29 04:56:28,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:56:28,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:56:28,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:56:28,013 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:56:28,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-29 04:56:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:56:28,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-29 04:56:28,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:56:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:56:28,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:56:28,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:56:28,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935488516] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 04:56:28,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1719439265] [2021-10-29 04:56:28,370 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-10-29 04:56:28,371 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 04:56:28,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 04:56:28,372 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 04:56:28,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 04:56:28,386 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:28,387 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:56:28,388 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:28,388 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 04:56:28,389 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:56:28,389 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:28,389 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 04:56:28,391 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-10-29 04:56:28,394 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_18|], 21=[|v_#valid_19|]} [2021-10-29 04:56:28,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:28,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:28,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:28,407 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 04:56:28,408 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:28,408 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 04:56:28,409 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:28,409 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 04:56:28,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 04:56:28,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:28,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:28,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:28,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:28,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:28,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:28,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:28,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:28,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:28,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:28,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 04:56:28,437 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 04:56:28,437 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:28,439 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 04:56:28,440 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:28,440 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 04:56:28,441 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 04:56:28,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:28,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:28,446 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:28,447 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-29 04:56:28,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 04:56:28,448 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:119 [2021-10-29 04:56:28,455 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:28,457 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-29 04:56:28,468 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:28,471 INFO L185 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 137 [2021-10-29 04:56:28,478 INFO L180 QuantifierPusher]: treesize reduction 7, result has 95.8 percent of original size [2021-10-29 04:56:28,482 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 149 [2021-10-29 04:56:28,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:28,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:28,511 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:28,535 INFO L180 QuantifierPusher]: treesize reduction 6, result has 98.4 percent of original size [2021-10-29 04:56:28,549 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 372 [2021-10-29 04:56:28,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:28,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:28,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:28,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:28,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:28,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:28,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:28,621 INFO L180 QuantifierPusher]: treesize reduction 49, result has 61.7 percent of original size [2021-10-29 04:56:28,625 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-10-29 04:56:28,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:28,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:28,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:28,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:28,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:28,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:28,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:28,695 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:28,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:28,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:28,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:28,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:56:28,736 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:28,737 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:56:28,739 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:28,758 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:56:28,764 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:28,766 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-29 04:56:28,768 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:56:28,772 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:28,777 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-10-29 04:56:28,783 INFO L185 QuantifierPusher]: treesize reduction 39, result has 87.5 percent of original size 273 [2021-10-29 04:56:28,787 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:56:28,788 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:28,789 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 04:56:28,790 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:28,792 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 04:56:28,793 INFO L185 QuantifierPusher]: treesize reduction 36, result has 56.6 percent of original size 47 [2021-10-29 04:56:28,795 INFO L185 QuantifierPusher]: treesize reduction 36, result has 63.3 percent of original size 62 [2021-10-29 04:56:28,804 INFO L180 QuantifierPusher]: treesize reduction 37, result has 70.6 percent of original size [2021-10-29 04:56:28,806 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-29 04:56:28,812 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:28,814 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-10-29 04:56:28,818 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:28,821 INFO L185 QuantifierPusher]: treesize reduction 6, result has 93.0 percent of original size 80 [2021-10-29 04:56:28,836 INFO L180 QuantifierPusher]: treesize reduction 7, result has 93.9 percent of original size [2021-10-29 04:56:28,839 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-10-29 04:56:28,848 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:28,850 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 106 [2021-10-29 04:56:28,856 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:28,860 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 199 [2021-10-29 04:56:28,941 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 04:56:28,946 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 364 [2021-10-29 04:56:28,950 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 04:56:39,794 WARN L207 SmtUtils]: Spent 5.77 s on a formula simplification. DAG size of input: 132 DAG size of output: 112 [2021-10-29 04:56:48,309 WARN L207 SmtUtils]: Spent 7.57 s on a formula simplification. DAG size of input: 136 DAG size of output: 116 [2021-10-29 04:56:56,381 WARN L207 SmtUtils]: Spent 6.97 s on a formula simplification. DAG size of input: 140 DAG size of output: 120 [2021-10-29 04:56:56,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1719439265] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:56:56,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-29 04:56:56,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [4, 4, 4] total 29 [2021-10-29 04:56:56,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870431248] [2021-10-29 04:56:56,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-29 04:56:56,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:56:56,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-29 04:56:56,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-10-29 04:56:56,384 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:57:04,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:57:04,440 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2021-10-29 04:57:04,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-29 04:57:04,441 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-29 04:57:04,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:57:04,442 INFO L225 Difference]: With dead ends: 109 [2021-10-29 04:57:04,442 INFO L226 Difference]: Without dead ends: 101 [2021-10-29 04:57:04,442 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-10-29 04:57:04,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-29 04:57:04,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 71. [2021-10-29 04:57:04,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.3) internal successors, (91), 70 states have internal predecessors, (91), 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 04:57:04,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2021-10-29 04:57:04,453 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 31 [2021-10-29 04:57:04,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:57:04,453 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2021-10-29 04:57:04,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:57:04,453 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2021-10-29 04:57:04,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-29 04:57:04,454 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:57:04,454 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:57:04,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-29 04:57:04,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:57:04,672 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:57:04,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:57:04,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1465854924, now seen corresponding path program 1 times [2021-10-29 04:57:04,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:57:04,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954361546] [2021-10-29 04:57:04,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:57:04,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:57:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:57:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:57:04,740 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:57:04,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954361546] [2021-10-29 04:57:04,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954361546] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 04:57:04,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202965251] [2021-10-29 04:57:04,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:57:04,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:57:04,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:57:04,742 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:57:04,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-29 04:57:04,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:57:04,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-29 04:57:04,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:57:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-29 04:57:05,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:57:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-29 04:57:06,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202965251] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 04:57:06,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-29 04:57:06,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5] total 14 [2021-10-29 04:57:06,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309957317] [2021-10-29 04:57:06,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-29 04:57:06,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:57:06,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-29 04:57:06,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-10-29 04:57:06,007 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 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 04:57:06,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:57:06,173 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2021-10-29 04:57:06,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-29 04:57:06,174 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 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 31 [2021-10-29 04:57:06,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:57:06,174 INFO L225 Difference]: With dead ends: 71 [2021-10-29 04:57:06,174 INFO L226 Difference]: Without dead ends: 0 [2021-10-29 04:57:06,176 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-10-29 04:57:06,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-29 04:57:06,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-29 04:57:06,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:57:06,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-29 04:57:06,177 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2021-10-29 04:57:06,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:57:06,177 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-29 04:57:06,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 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 04:57:06,178 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-29 04:57:06,178 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-29 04:57:06,180 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 04:57:06,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-29 04:57:06,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-10-29 04:57:06,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-29 04:57:06,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:57:06,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:57:06,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:57:06,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:57:06,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:57:06,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:57:06,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:57:06,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:57:06,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:57:06,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:57:06,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:57:06,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:57:06,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:57:06,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:57:06,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:57:06,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:57:06,755 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:57:06,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:57:07,843 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-29 04:57:07,843 INFO L857 garLoopResultBuilder]: For program point L186(lines 186 203) no Hoare annotation was computed. [2021-10-29 04:57:07,843 INFO L857 garLoopResultBuilder]: For program point L186-2(lines 186 203) no Hoare annotation was computed. [2021-10-29 04:57:07,843 INFO L857 garLoopResultBuilder]: For program point L21(lines 21 26) no Hoare annotation was computed. [2021-10-29 04:57:07,843 INFO L857 garLoopResultBuilder]: For program point L21-1(lines 21 26) no Hoare annotation was computed. [2021-10-29 04:57:07,843 INFO L857 garLoopResultBuilder]: For program point L21-2(lines 21 26) no Hoare annotation was computed. [2021-10-29 04:57:07,844 INFO L857 garLoopResultBuilder]: For program point L21-3(lines 21 26) no Hoare annotation was computed. [2021-10-29 04:57:07,844 INFO L853 garLoopResultBuilder]: At program point L71(lines 20 73) the Hoare annotation is: (let ((.cse0 (select |#memory_int| |#t~string4.base|))) (and (< |#StackHeapBarrier| |#t~string6.base|) (<= ULTIMATE.start_main_~ea~2 127) (< |#StackHeapBarrier| |#t~string5.base|) (<= 0 (+ ULTIMATE.start_main_~ea~2 128)) (= (select |#valid| |#t~string5.base|) 1) (= (select |#valid| |#t~string4.base|) 1) (= |#t~string5.offset| 0) (<= ULTIMATE.start_main_~eb~2 127) (= |ULTIMATE.start_base2flt_#in~m| 0) (= ULTIMATE.start_base2flt_~__retres4~0 0) (<= 0 (+ ULTIMATE.start_main_~eb~2 128)) (= (select |#valid| |#t~string6.base|) 1) (= |ULTIMATE.start_base2flt_#in~m| ULTIMATE.start_base2flt_~m) (= (select |#valid| 0) 0) (< |#StackHeapBarrier| |#t~string4.base|) (= (select |#length| |#t~string6.base|) 12) (= (select .cse0 (+ 1 |#t~string4.offset|)) 0) (= |#NULL.offset| 0) (= |#t~string6.offset| 0) (= |ULTIMATE.start_base2flt_#in~e| 0) (= |ULTIMATE.start_base2flt_#in~e| ULTIMATE.start_base2flt_~e) (= (select |#length| |#t~string4.base|) 2) (= (select .cse0 |#t~string4.offset|) 48) (= 22 (select |#length| |#t~string5.base|)) (= 0 |#t~string4.offset|) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2021-10-29 04:57:07,844 INFO L853 garLoopResultBuilder]: At program point L71-1(lines 20 73) the Hoare annotation is: (and (<= 0 |#t~string4.base|) (<= (+ ULTIMATE.start_base2flt_~e 1) 0) (= ULTIMATE.start_main_~zero~0 0) (<= ULTIMATE.start_main_~ea~2 127) (<= 0 (+ ULTIMATE.start_main_~ea~2 128)) (<= 0 |#t~string5.base|) (<= ULTIMATE.start_main_~eb~2 127) (<= 0 |#t~string5.offset|) (<= 0 (+ ULTIMATE.start_main_~eb~2 128)) (<= 0 |#t~string6.base|) (= |#NULL.offset| 0) (= |#t~string6.offset| 0) (= |ULTIMATE.start_base2flt_#in~e| 0) (= |ULTIMATE.start_base2flt_#in~m| 1) (<= 0 |#StackHeapBarrier|) (<= |#t~string5.offset| 0) (= 0 |#t~string4.offset|) (= |#NULL.base| 0)) [2021-10-29 04:57:07,844 INFO L853 garLoopResultBuilder]: At program point L71-2(lines 20 73) the Hoare annotation is: (= ULTIMATE.start_main_~zero~0 0) [2021-10-29 04:57:07,844 INFO L853 garLoopResultBuilder]: At program point L71-3(lines 20 73) the Hoare annotation is: (= ULTIMATE.start_main_~zero~0 0) [2021-10-29 04:57:07,844 INFO L857 garLoopResultBuilder]: For program point L187(lines 187 192) no Hoare annotation was computed. [2021-10-29 04:57:07,844 INFO L857 garLoopResultBuilder]: For program point L171(lines 171 176) no Hoare annotation was computed. [2021-10-29 04:57:07,844 INFO L857 garLoopResultBuilder]: For program point L39(lines 39 43) no Hoare annotation was computed. [2021-10-29 04:57:07,845 INFO L853 garLoopResultBuilder]: At program point L39-1(lines 29 44) the Hoare annotation is: false [2021-10-29 04:57:07,845 INFO L857 garLoopResultBuilder]: For program point L39-2(lines 39 43) no Hoare annotation was computed. [2021-10-29 04:57:07,845 INFO L853 garLoopResultBuilder]: At program point L39-3(lines 29 44) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~zero~0 0)) (.cse1 (<= ULTIMATE.start_main_~ea~2 127)) (.cse2 (<= 0 (+ ULTIMATE.start_main_~ea~2 128))) (.cse3 (<= ULTIMATE.start_main_~eb~2 127)) (.cse4 (<= 0 (+ ULTIMATE.start_main_~eb~2 128))) (.cse5 (= |#NULL.offset| 0)) (.cse6 (= |#t~string6.offset| 0)) (.cse7 (= |ULTIMATE.start_base2flt_#in~m| 1)) (.cse8 (= 0 |#t~string4.offset|)) (.cse9 (= |#NULL.base| 0))) (or (and (< (mod ULTIMATE.start_base2flt_~m 4294967296) 16777216) (<= 0 |#t~string4.base|) (<= (+ ULTIMATE.start_base2flt_~e 1) 0) .cse0 .cse1 .cse2 (<= 0 |#t~string5.base|) .cse3 (<= 0 |#t~string5.offset|) .cse4 (<= 0 |#t~string6.base|) .cse5 .cse6 (= |ULTIMATE.start_base2flt_#in~e| 0) .cse7 (<= 0 |#StackHeapBarrier|) (<= |#t~string5.offset| 0) .cse8 .cse9) (let ((.cse10 (select |#memory_int| |#t~string4.base|))) (and (< |#StackHeapBarrier| |#t~string6.base|) .cse0 .cse1 (< |#StackHeapBarrier| |#t~string5.base|) .cse2 (= (select |#valid| |#t~string5.base|) 1) (= (select |#valid| |#t~string4.base|) 1) (= |#t~string5.offset| 0) .cse3 .cse4 (= (select |#valid| |#t~string6.base|) 1) (= |ULTIMATE.start_base2flt_#in~m| ULTIMATE.start_base2flt_~m) (= (select |#valid| 0) 0) (< |#StackHeapBarrier| |#t~string4.base|) (= (select |#length| |#t~string6.base|) 12) (= (select .cse10 (+ 1 |#t~string4.offset|)) 0) .cse5 .cse6 (= |ULTIMATE.start_base2flt_#in~e| ULTIMATE.start_base2flt_~e) (= (select |#length| |#t~string4.base|) 2) (= ULTIMATE.start_base2flt_~e 0) (= (select .cse10 |#t~string4.offset|) 48) .cse7 (= 22 (select |#length| |#t~string5.base|)) .cse8 (< 0 |#StackHeapBarrier|) .cse9)))) [2021-10-29 04:57:07,845 INFO L857 garLoopResultBuilder]: For program point L39-4(lines 39 43) no Hoare annotation was computed. [2021-10-29 04:57:07,845 INFO L853 garLoopResultBuilder]: At program point L39-5(lines 29 44) the Hoare annotation is: (= ULTIMATE.start_main_~zero~0 0) [2021-10-29 04:57:07,845 INFO L857 garLoopResultBuilder]: For program point L39-6(lines 39 43) no Hoare annotation was computed. [2021-10-29 04:57:07,845 INFO L853 garLoopResultBuilder]: At program point L39-7(lines 29 44) the Hoare annotation is: (= ULTIMATE.start_main_~zero~0 0) [2021-10-29 04:57:07,845 INFO L857 garLoopResultBuilder]: For program point L8(lines 8 10) no Hoare annotation was computed. [2021-10-29 04:57:07,845 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-29 04:57:07,845 INFO L857 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2021-10-29 04:57:07,845 INFO L853 garLoopResultBuilder]: At program point L208(lines 149 210) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~zero~0 0))) (or (and .cse0 (= ULTIMATE.start_mulflt_~__retres10~1 0)) (and .cse0 (= ULTIMATE.start_main_~sb~0 1)))) [2021-10-29 04:57:07,846 INFO L857 garLoopResultBuilder]: For program point L27(lines 27 67) no Hoare annotation was computed. [2021-10-29 04:57:07,846 INFO L857 garLoopResultBuilder]: For program point L27-1(lines 27 67) no Hoare annotation was computed. [2021-10-29 04:57:07,846 INFO L857 garLoopResultBuilder]: For program point L27-2(lines 27 67) no Hoare annotation was computed. [2021-10-29 04:57:07,846 INFO L857 garLoopResultBuilder]: For program point L27-3(lines 27 67) no Hoare annotation was computed. [2021-10-29 04:57:07,846 INFO L857 garLoopResultBuilder]: For program point L177(lines 177 182) no Hoare annotation was computed. [2021-10-29 04:57:07,846 INFO L857 garLoopResultBuilder]: For program point L195(lines 195 200) no Hoare annotation was computed. [2021-10-29 04:57:07,846 INFO L857 garLoopResultBuilder]: For program point L30(lines 29 44) no Hoare annotation was computed. [2021-10-29 04:57:07,846 INFO L857 garLoopResultBuilder]: For program point L30-1(lines 29 44) no Hoare annotation was computed. [2021-10-29 04:57:07,846 INFO L857 garLoopResultBuilder]: For program point L30-2(lines 29 44) no Hoare annotation was computed. [2021-10-29 04:57:07,846 INFO L857 garLoopResultBuilder]: For program point L30-3(lines 29 44) no Hoare annotation was computed. [2021-10-29 04:57:07,846 INFO L853 garLoopResultBuilder]: At program point L65(lines 27 67) the Hoare annotation is: false [2021-10-29 04:57:07,846 INFO L853 garLoopResultBuilder]: At program point L65-1(lines 27 67) the Hoare annotation is: (and (<= 0 |#t~string4.base|) (<= (+ ULTIMATE.start_base2flt_~e 1) 0) (= ULTIMATE.start_main_~zero~0 0) (<= ULTIMATE.start_main_~ea~2 127) (<= 0 (+ ULTIMATE.start_main_~ea~2 128)) (<= 0 |#t~string5.base|) (<= ULTIMATE.start_main_~eb~2 127) (<= 0 |#t~string5.offset|) (<= 0 (+ ULTIMATE.start_main_~eb~2 128)) (<= 0 |#t~string6.base|) (= |#NULL.offset| 0) (= |#t~string6.offset| 0) (= |ULTIMATE.start_base2flt_#in~e| 0) (= |ULTIMATE.start_base2flt_#in~m| 1) (<= 0 |#StackHeapBarrier|) (<= |#t~string5.offset| 0) (= 0 |#t~string4.offset|) (= |#NULL.base| 0)) [2021-10-29 04:57:07,847 INFO L853 garLoopResultBuilder]: At program point L65-2(lines 27 67) the Hoare annotation is: (= ULTIMATE.start_main_~zero~0 0) [2021-10-29 04:57:07,847 INFO L853 garLoopResultBuilder]: At program point L65-3(lines 27 67) the Hoare annotation is: (= ULTIMATE.start_main_~zero~0 0) [2021-10-29 04:57:07,847 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2021-10-29 04:57:07,847 INFO L853 garLoopResultBuilder]: At program point L49-2(lines 49 64) the Hoare annotation is: false [2021-10-29 04:57:07,847 INFO L853 garLoopResultBuilder]: At program point L49-5(lines 49 64) the Hoare annotation is: false [2021-10-29 04:57:07,847 INFO L853 garLoopResultBuilder]: At program point L49-8(lines 49 64) the Hoare annotation is: (= ULTIMATE.start_main_~zero~0 0) [2021-10-29 04:57:07,847 INFO L853 garLoopResultBuilder]: At program point L49-11(lines 49 64) the Hoare annotation is: (= ULTIMATE.start_main_~zero~0 0) [2021-10-29 04:57:07,847 INFO L857 garLoopResultBuilder]: For program point L248(lines 248 264) no Hoare annotation was computed. [2021-10-29 04:57:07,847 INFO L860 garLoopResultBuilder]: At program point L248-1(lines 248 264) the Hoare annotation is: true [2021-10-29 04:57:07,847 INFO L857 garLoopResultBuilder]: For program point L50(lines 49 64) no Hoare annotation was computed. [2021-10-29 04:57:07,847 INFO L857 garLoopResultBuilder]: For program point L50-1(lines 49 64) no Hoare annotation was computed. [2021-10-29 04:57:07,847 INFO L857 garLoopResultBuilder]: For program point L50-2(lines 49 64) no Hoare annotation was computed. [2021-10-29 04:57:07,850 INFO L857 garLoopResultBuilder]: For program point L50-3(lines 49 64) no Hoare annotation was computed. [2021-10-29 04:57:07,850 INFO L857 garLoopResultBuilder]: For program point L150-2(lines 149 210) no Hoare annotation was computed. [2021-10-29 04:57:07,851 INFO L857 garLoopResultBuilder]: For program point L51(lines 49 64) no Hoare annotation was computed. [2021-10-29 04:57:07,851 INFO L857 garLoopResultBuilder]: For program point L51-1(lines 49 64) no Hoare annotation was computed. [2021-10-29 04:57:07,851 INFO L857 garLoopResultBuilder]: For program point L51-2(lines 49 64) no Hoare annotation was computed. [2021-10-29 04:57:07,851 INFO L857 garLoopResultBuilder]: For program point L51-3(lines 49 64) no Hoare annotation was computed. [2021-10-29 04:57:07,854 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:57:07,855 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 04:57:07,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 04:57:07 BoogieIcfgContainer [2021-10-29 04:57:07,919 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 04:57:07,920 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 04:57:07,920 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 04:57:07,920 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 04:57:07,921 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:54:57" (3/4) ... [2021-10-29 04:57:07,923 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-29 04:57:07,934 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 36 nodes and edges [2021-10-29 04:57:07,935 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-29 04:57:07,935 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-29 04:57:07,936 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-29 04:57:07,960 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((((((((((((((((((((((unknown-#StackHeapBarrier-unknown < "reach_error" && ea <= 127) && unknown-#StackHeapBarrier-unknown < "soft_float_5a.c.cil.c") && 0 <= ea + 128) && \valid["soft_float_5a.c.cil.c"] == 1) && \valid["0"] == 1) && "soft_float_5a.c.cil.c" == 0) && eb <= 127) && \old(m) == 0) && __retres4 == 0) && 0 <= eb + 128) && \valid["reach_error"] == 1) && \old(m) == m) && \valid[0] == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["reach_error"] == 12) && unknown-#memory_int-unknown["0"][1 + "0"] == 0) && #NULL == 0) && "reach_error" == 0) && \old(e) == 0) && \old(e) == e) && unknown-#length-unknown["0"] == 2) && unknown-#memory_int-unknown["0"]["0"] == 48) && 22 == unknown-#length-unknown["soft_float_5a.c.cil.c"]) && 0 == "0") && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0 [2021-10-29 04:57:07,960 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((((((((0 <= "0" && e + 1 <= 0) && zero == 0) && ea <= 127) && 0 <= ea + 128) && 0 <= "soft_float_5a.c.cil.c") && eb <= 127) && 0 <= "soft_float_5a.c.cil.c") && 0 <= eb + 128) && 0 <= "reach_error") && #NULL == 0) && "reach_error" == 0) && \old(e) == 0) && \old(m) == 1) && 0 <= unknown-#StackHeapBarrier-unknown) && "soft_float_5a.c.cil.c" <= 0) && 0 == "0") && #NULL == 0 [2021-10-29 04:57:07,961 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((((((((((m % 4294967296 < 16777216 && 0 <= "0") && e + 1 <= 0) && zero == 0) && ea <= 127) && 0 <= ea + 128) && 0 <= "soft_float_5a.c.cil.c") && eb <= 127) && 0 <= "soft_float_5a.c.cil.c") && 0 <= eb + 128) && 0 <= "reach_error") && #NULL == 0) && "reach_error" == 0) && \old(e) == 0) && \old(m) == 1) && 0 <= unknown-#StackHeapBarrier-unknown) && "soft_float_5a.c.cil.c" <= 0) && 0 == "0") && #NULL == 0) || ((((((((((((((((((((((((((unknown-#StackHeapBarrier-unknown < "reach_error" && zero == 0) && ea <= 127) && unknown-#StackHeapBarrier-unknown < "soft_float_5a.c.cil.c") && 0 <= ea + 128) && \valid["soft_float_5a.c.cil.c"] == 1) && \valid["0"] == 1) && "soft_float_5a.c.cil.c" == 0) && eb <= 127) && 0 <= eb + 128) && \valid["reach_error"] == 1) && \old(m) == m) && \valid[0] == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["reach_error"] == 12) && unknown-#memory_int-unknown["0"][1 + "0"] == 0) && #NULL == 0) && "reach_error" == 0) && \old(e) == e) && unknown-#length-unknown["0"] == 2) && e == 0) && unknown-#memory_int-unknown["0"]["0"] == 48) && \old(m) == 1) && 22 == unknown-#length-unknown["soft_float_5a.c.cil.c"]) && 0 == "0") && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) [2021-10-29 04:57:07,961 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((((((((0 <= "0" && e + 1 <= 0) && zero == 0) && ea <= 127) && 0 <= ea + 128) && 0 <= "soft_float_5a.c.cil.c") && eb <= 127) && 0 <= "soft_float_5a.c.cil.c") && 0 <= eb + 128) && 0 <= "reach_error") && #NULL == 0) && "reach_error" == 0) && \old(e) == 0) && \old(m) == 1) && 0 <= unknown-#StackHeapBarrier-unknown) && "soft_float_5a.c.cil.c" <= 0) && 0 == "0") && #NULL == 0 [2021-10-29 04:57:07,991 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 04:57:07,991 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 04:57:07,992 INFO L168 Benchmark]: Toolchain (without parser) took 131663.50 ms. Allocated memory was 123.7 MB in the beginning and 155.2 MB in the end (delta: 31.5 MB). Free memory was 90.3 MB in the beginning and 83.5 MB in the end (delta: 6.8 MB). Peak memory consumption was 38.5 MB. Max. memory is 16.1 GB. [2021-10-29 04:57:07,992 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 92.3 MB. Free memory is still 51.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 04:57:07,993 INFO L168 Benchmark]: CACSL2BoogieTranslator took 356.87 ms. Allocated memory is still 123.7 MB. Free memory was 90.0 MB in the beginning and 97.0 MB in the end (delta: -7.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-29 04:57:07,993 INFO L168 Benchmark]: Boogie Procedure Inliner took 81.68 ms. Allocated memory is still 123.7 MB. Free memory was 97.0 MB in the beginning and 94.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 04:57:07,993 INFO L168 Benchmark]: Boogie Preprocessor took 30.88 ms. Allocated memory is still 123.7 MB. Free memory was 94.9 MB in the beginning and 93.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 04:57:07,993 INFO L168 Benchmark]: RCFGBuilder took 700.55 ms. Allocated memory is still 123.7 MB. Free memory was 92.8 MB in the beginning and 69.5 MB in the end (delta: 23.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-29 04:57:07,994 INFO L168 Benchmark]: TraceAbstraction took 130415.40 ms. Allocated memory was 123.7 MB in the beginning and 155.2 MB in the end (delta: 31.5 MB). Free memory was 69.1 MB in the beginning and 89.7 MB in the end (delta: -20.6 MB). Peak memory consumption was 70.3 MB. Max. memory is 16.1 GB. [2021-10-29 04:57:07,994 INFO L168 Benchmark]: Witness Printer took 71.64 ms. Allocated memory is still 155.2 MB. Free memory was 89.7 MB in the beginning and 83.5 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-29 04:57:07,995 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 92.3 MB. Free memory is still 51.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 356.87 ms. Allocated memory is still 123.7 MB. Free memory was 90.0 MB in the beginning and 97.0 MB in the end (delta: -7.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 81.68 ms. Allocated memory is still 123.7 MB. Free memory was 97.0 MB in the beginning and 94.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.88 ms. Allocated memory is still 123.7 MB. Free memory was 94.9 MB in the beginning and 93.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 700.55 ms. Allocated memory is still 123.7 MB. Free memory was 92.8 MB in the beginning and 69.5 MB in the end (delta: 23.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 130415.40 ms. Allocated memory was 123.7 MB in the beginning and 155.2 MB in the end (delta: 31.5 MB). Free memory was 69.1 MB in the beginning and 89.7 MB in the end (delta: -20.6 MB). Peak memory consumption was 70.3 MB. Max. memory is 16.1 GB. * Witness Printer took 71.64 ms. Allocated memory is still 155.2 MB. Free memory was 89.7 MB in the beginning and 83.5 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 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 - PositiveResult [Line: 9]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 55 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 130.2s, OverallIterations: 16, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 19.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 794 SDtfs, 1030 SDslu, 4061 SDs, 0 SdLazy, 6248 SolverSat, 86 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 15.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1078 GetRequests, 752 SyntacticMatches, 12 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2906 ImplicationChecksByTransitivity, 95.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=13, InterpolantAutomatonStates: 260, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 251 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 18 PreInvPairs, 76 NumberOfFragments, 453 HoareAnnotationTreeSize, 18 FomulaSimplifications, 242437 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 18 FomulaSimplificationsInter, 3115 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 776 NumberOfCodeBlocks, 776 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 1097 ConstructedInterpolants, 0 QuantifiedInterpolants, 2551 SizeOfPredicates, 41 NumberOfNonLiveVariables, 1773 ConjunctsInSsa, 92 ConjunctsInUnsatCore, 42 InterpolantComputations, 9 PerfectInterpolantSequences, 18/87 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME[ms]: 6678, ICFG_INTERPRETER_ENTERED_PROCEDURES: 10, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 278, DAG_INTERPRETER_EARLY_EXITS: 10, TOOLS_POST_APPLICATIONS: 358, TOOLS_POST_TIME[ms]: 2816, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 358, TOOLS_QUANTIFIERELIM_TIME[ms]: 2713, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 237, FLUID_QUERY_TIME[ms]: 21, FLUID_QUERIES: 686, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 30, DOMAIN_JOIN_TIME[ms]: 1511, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 20, DOMAIN_WIDEN_TIME[ms]: 1231, DOMAIN_ISSUBSETEQ_APPLICATIONS: 30, DOMAIN_ISSUBSETEQ_TIME[ms]: 103, DOMAIN_ISBOTTOM_APPLICATIONS: 278, DOMAIN_ISBOTTOM_TIME[ms]: 753, LOOP_SUMMARIZER_APPLICATIONS: 10, LOOP_SUMMARIZER_CACHE_MISSES: 10, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 1813, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 1812, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 30, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 5, PATH_EXPR_TIME[ms]: 11, REGEX_TO_DAG_TIME[ms]: 11, DAG_COMPRESSION_TIME[ms]: 111, DAG_COMPRESSION_PROCESSED_NODES: 7013, DAG_COMPRESSION_RETAINED_NODES: 654, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: ((((((((((((((((((m % 4294967296 < 16777216 && 0 <= "0") && e + 1 <= 0) && zero == 0) && ea <= 127) && 0 <= ea + 128) && 0 <= "soft_float_5a.c.cil.c") && eb <= 127) && 0 <= "soft_float_5a.c.cil.c") && 0 <= eb + 128) && 0 <= "reach_error") && #NULL == 0) && "reach_error" == 0) && \old(e) == 0) && \old(m) == 1) && 0 <= unknown-#StackHeapBarrier-unknown) && "soft_float_5a.c.cil.c" <= 0) && 0 == "0") && #NULL == 0) || ((((((((((((((((((((((((((unknown-#StackHeapBarrier-unknown < "reach_error" && zero == 0) && ea <= 127) && unknown-#StackHeapBarrier-unknown < "soft_float_5a.c.cil.c") && 0 <= ea + 128) && \valid["soft_float_5a.c.cil.c"] == 1) && \valid["0"] == 1) && "soft_float_5a.c.cil.c" == 0) && eb <= 127) && 0 <= eb + 128) && \valid["reach_error"] == 1) && \old(m) == m) && \valid[0] == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["reach_error"] == 12) && unknown-#memory_int-unknown["0"][1 + "0"] == 0) && #NULL == 0) && "reach_error" == 0) && \old(e) == e) && unknown-#length-unknown["0"] == 2) && e == 0) && unknown-#memory_int-unknown["0"]["0"] == 48) && \old(m) == 1) && 22 == unknown-#length-unknown["soft_float_5a.c.cil.c"]) && 0 == "0") && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((((((((((((((((0 <= "0" && e + 1 <= 0) && zero == 0) && ea <= 127) && 0 <= ea + 128) && 0 <= "soft_float_5a.c.cil.c") && eb <= 127) && 0 <= "soft_float_5a.c.cil.c") && 0 <= eb + 128) && 0 <= "reach_error") && #NULL == 0) && "reach_error" == 0) && \old(e) == 0) && \old(m) == 1) && 0 <= unknown-#StackHeapBarrier-unknown) && "soft_float_5a.c.cil.c" <= 0) && 0 == "0") && #NULL == 0 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: zero == 0 - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((unknown-#StackHeapBarrier-unknown < "reach_error" && ea <= 127) && unknown-#StackHeapBarrier-unknown < "soft_float_5a.c.cil.c") && 0 <= ea + 128) && \valid["soft_float_5a.c.cil.c"] == 1) && \valid["0"] == 1) && "soft_float_5a.c.cil.c" == 0) && eb <= 127) && \old(m) == 0) && __retres4 == 0) && 0 <= eb + 128) && \valid["reach_error"] == 1) && \old(m) == m) && \valid[0] == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["reach_error"] == 12) && unknown-#memory_int-unknown["0"][1 + "0"] == 0) && #NULL == 0) && "reach_error" == 0) && \old(e) == 0) && \old(e) == e) && unknown-#length-unknown["0"] == 2) && unknown-#memory_int-unknown["0"]["0"] == 48) && 22 == unknown-#length-unknown["soft_float_5a.c.cil.c"]) && 0 == "0") && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: ((((((((((((((((0 <= "0" && e + 1 <= 0) && zero == 0) && ea <= 127) && 0 <= ea + 128) && 0 <= "soft_float_5a.c.cil.c") && eb <= 127) && 0 <= "soft_float_5a.c.cil.c") && 0 <= eb + 128) && 0 <= "reach_error") && #NULL == 0) && "reach_error" == 0) && \old(e) == 0) && \old(m) == 1) && 0 <= unknown-#StackHeapBarrier-unknown) && "soft_float_5a.c.cil.c" <= 0) && 0 == "0") && #NULL == 0 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: zero == 0 - InvariantResult [Line: 149]: Loop Invariant Derived loop invariant: (zero == 0 && __retres10 == 0) || (zero == 0 && sb == 1) - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: zero == 0 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: zero == 0 - InvariantResult [Line: 248]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: zero == 0 - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: zero == 0 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: zero == 0 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: zero == 0 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 0 RESULT: Ultimate proved your program to be correct! [2021-10-29 04:57:08,220 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-29 04:57:08,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d07a403d-9833-47bb-8c05-66a253ad6775/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...