./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/string_concat-noarr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/string_concat-noarr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs --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 30a4b942034eaa47a8fcc8fdf4549d1d63a9a60d59b585da2a353c9626604750 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:41:13,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:41:13,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:41:13,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:41:13,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:41:13,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:41:13,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:41:13,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:41:13,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:41:13,729 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:41:13,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:41:13,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:41:13,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:41:13,737 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:41:13,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:41:13,744 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:41:13,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:41:13,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:41:13,751 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:41:13,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:41:13,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:41:13,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:41:13,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:41:13,771 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:41:13,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:41:13,782 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:41:13,782 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:41:13,784 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:41:13,785 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:41:13,787 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:41:13,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:41:13,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:41:13,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:41:13,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:41:13,794 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:41:13,795 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:41:13,796 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:41:13,796 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:41:13,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:41:13,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:41:13,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:41:13,800 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:41:13,849 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:41:13,850 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:41:13,852 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:41:13,852 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:41:13,852 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:41:13,853 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:41:13,853 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:41:13,853 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:41:13,854 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:41:13,857 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:41:13,859 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:41:13,859 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:41:13,860 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:41:13,860 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:41:13,860 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:41:13,861 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:41:13,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:41:13,862 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:41:13,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:41:13,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:41:13,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:41:13,864 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:41:13,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:41:13,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:41:13,865 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:41:13,865 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:41:13,865 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:41:13,866 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:41:13,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:41:13,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:41:13,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:41:13,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:41:13,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:41:13,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:41:13,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:41:13,869 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:41:13,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:41:13,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:41:13,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:41:13,870 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:41:13,870 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_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30a4b942034eaa47a8fcc8fdf4549d1d63a9a60d59b585da2a353c9626604750 [2021-11-19 14:41:14,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:41:14,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:41:14,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:41:14,293 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:41:14,294 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:41:14,296 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/loop-invgen/string_concat-noarr.i [2021-11-19 14:41:14,390 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/data/41d92ec20/18866d3160394621aedbd04d0d578742/FLAGc95c5e6e7 [2021-11-19 14:41:14,939 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:41:14,940 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/sv-benchmarks/c/loop-invgen/string_concat-noarr.i [2021-11-19 14:41:14,952 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/data/41d92ec20/18866d3160394621aedbd04d0d578742/FLAGc95c5e6e7 [2021-11-19 14:41:15,306 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/data/41d92ec20/18866d3160394621aedbd04d0d578742 [2021-11-19 14:41:15,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:41:15,312 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:41:15,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:41:15,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:41:15,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:41:15,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:41:15" (1/1) ... [2021-11-19 14:41:15,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5adb715d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:15, skipping insertion in model container [2021-11-19 14:41:15,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:41:15" (1/1) ... [2021-11-19 14:41:15,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:41:15,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:41:15,572 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/sv-benchmarks/c/loop-invgen/string_concat-noarr.i[893,906] [2021-11-19 14:41:15,588 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:41:15,600 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:41:15,616 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/sv-benchmarks/c/loop-invgen/string_concat-noarr.i[893,906] [2021-11-19 14:41:15,620 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:41:15,636 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:41:15,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:15 WrapperNode [2021-11-19 14:41:15,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:41:15,638 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:41:15,638 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:41:15,638 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:41:15,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:15" (1/1) ... [2021-11-19 14:41:15,655 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:15" (1/1) ... [2021-11-19 14:41:15,673 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2021-11-19 14:41:15,673 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:41:15,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:41:15,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:41:15,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:41:15,684 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:15" (1/1) ... [2021-11-19 14:41:15,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:15" (1/1) ... [2021-11-19 14:41:15,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:15" (1/1) ... [2021-11-19 14:41:15,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:15" (1/1) ... [2021-11-19 14:41:15,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:15" (1/1) ... [2021-11-19 14:41:15,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:15" (1/1) ... [2021-11-19 14:41:15,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:15" (1/1) ... [2021-11-19 14:41:15,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:41:15,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:41:15,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:41:15,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:41:15,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:15" (1/1) ... [2021-11-19 14:41:15,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:41:15,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:41:15,736 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:41:15,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:41:15,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:41:15,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 14:41:15,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:41:15,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:41:15,869 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:41:15,871 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:41:16,075 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:41:16,101 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:41:16,101 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-19 14:41:16,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:41:16 BoogieIcfgContainer [2021-11-19 14:41:16,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:41:16,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:41:16,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:41:16,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:41:16,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:41:15" (1/3) ... [2021-11-19 14:41:16,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@611802aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:41:16, skipping insertion in model container [2021-11-19 14:41:16,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:15" (2/3) ... [2021-11-19 14:41:16,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@611802aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:41:16, skipping insertion in model container [2021-11-19 14:41:16,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:41:16" (3/3) ... [2021-11-19 14:41:16,112 INFO L111 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.i [2021-11-19 14:41:16,118 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:41:16,118 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:41:16,183 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:41:16,195 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:41:16,195 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:41:16,223 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 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) [2021-11-19 14:41:16,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-19 14:41:16,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:16,235 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:16,236 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:16,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:16,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1248656439, now seen corresponding path program 1 times [2021-11-19 14:41:16,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:41:16,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708186902] [2021-11-19 14:41:16,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:16,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:41:16,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:16,452 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:41:16,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708186902] [2021-11-19 14:41:16,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708186902] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:41:16,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:41:16,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 14:41:16,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340364898] [2021-11-19 14:41:16,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:41:16,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:41:16,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:41:16,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:41:16,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:41:16,513 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 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) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:16,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:16,533 INFO L93 Difference]: Finished difference Result 23 states and 33 transitions. [2021-11-19 14:41:16,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:41:16,535 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-19 14:41:16,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:16,543 INFO L225 Difference]: With dead ends: 23 [2021-11-19 14:41:16,543 INFO L226 Difference]: Without dead ends: 10 [2021-11-19 14:41:16,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:41:16,550 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:16,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:41:16,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-19 14:41:16,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-19 14:41:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:16,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-19 14:41:16,601 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2021-11-19 14:41:16,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:16,601 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-19 14:41:16,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:16,602 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-19 14:41:16,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-19 14:41:16,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:16,603 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:16,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 14:41:16,603 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:16,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:16,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1788682382, now seen corresponding path program 1 times [2021-11-19 14:41:16,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:41:16,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474046051] [2021-11-19 14:41:16,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:16,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:41:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:16,692 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:41:16,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474046051] [2021-11-19 14:41:16,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474046051] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:41:16,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:41:16,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:41:16,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639991385] [2021-11-19 14:41:16,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:41:16,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:41:16,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:41:16,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:41:16,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:41:16,699 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:16,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:16,768 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-11-19 14:41:16,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:41:16,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-19 14:41:16,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:16,770 INFO L225 Difference]: With dead ends: 19 [2021-11-19 14:41:16,771 INFO L226 Difference]: Without dead ends: 15 [2021-11-19 14:41:16,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:41:16,775 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:16,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 11 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:41:16,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-19 14:41:16,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2021-11-19 14:41:16,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:16,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-19 14:41:16,787 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2021-11-19 14:41:16,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:16,790 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-19 14:41:16,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:16,791 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-19 14:41:16,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 14:41:16,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:16,794 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:16,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 14:41:16,794 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:16,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:16,796 INFO L85 PathProgramCache]: Analyzing trace with hash 981712553, now seen corresponding path program 1 times [2021-11-19 14:41:16,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:41:16,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199508233] [2021-11-19 14:41:16,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:16,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:41:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:16,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:16,865 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:41:16,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199508233] [2021-11-19 14:41:16,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199508233] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:41:16,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659437010] [2021-11-19 14:41:16,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:16,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:41:16,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:41:16,868 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:41:16,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 14:41:16,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:16,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:41:16,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:17,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:17,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659437010] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:41:17,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1178074246] [2021-11-19 14:41:17,192 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-19 14:41:17,192 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:41:17,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 14:41:17,202 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 14:41:17,202 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 14:41:17,239 INFO L180 QuantifierPusher]: treesize reduction 13, result has 81.2 percent of original size [2021-11-19 14:41:17,252 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-19 14:41:17,262 INFO L180 QuantifierPusher]: treesize reduction 7, result has 91.8 percent of original size [2021-11-19 14:41:17,269 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-11-19 14:41:17,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:17,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:17,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:17,394 INFO L180 QuantifierPusher]: treesize reduction 4, result has 97.7 percent of original size [2021-11-19 14:41:17,421 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 14:41:17,429 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:41:17,439 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-11-19 14:41:17,444 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 144 [2021-11-19 14:41:17,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:17,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:17,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:17,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:17,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:17,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:17,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:17,517 INFO L180 QuantifierPusher]: treesize reduction 12, result has 77.8 percent of original size [2021-11-19 14:41:17,536 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-11-19 14:41:17,545 INFO L180 QuantifierPusher]: treesize reduction 12, result has 73.3 percent of original size [2021-11-19 14:41:17,551 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 14:41:17,556 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:41:17,559 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-19 14:41:17,561 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-19 14:41:17,569 INFO L180 QuantifierPusher]: treesize reduction 12, result has 77.8 percent of original size [2021-11-19 14:41:17,578 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-11-19 14:41:17,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:17,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:17,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:17,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:17,636 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-19 14:41:18,036 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 14:41:18,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:41:18,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-19 14:41:18,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781676503] [2021-11-19 14:41:18,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:41:18,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:41:18,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:41:18,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:41:18,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:41:18,039 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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) [2021-11-19 14:41:18,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:18,127 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-11-19 14:41:18,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:41:18,128 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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 11 [2021-11-19 14:41:18,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:18,129 INFO L225 Difference]: With dead ends: 42 [2021-11-19 14:41:18,129 INFO L226 Difference]: Without dead ends: 34 [2021-11-19 14:41:18,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:41:18,131 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 26 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:18,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 17 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:41:18,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-19 14:41:18,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2021-11-19 14:41:18,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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) [2021-11-19 14:41:18,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-19 14:41:18,137 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 11 [2021-11-19 14:41:18,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:18,138 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-19 14:41:18,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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) [2021-11-19 14:41:18,138 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-19 14:41:18,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-19 14:41:18,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:18,139 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:18,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:18,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:41:18,367 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:18,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:18,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1147123834, now seen corresponding path program 2 times [2021-11-19 14:41:18,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:41:18,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240856549] [2021-11-19 14:41:18,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:18,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:41:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:18,498 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:18,498 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:41:18,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240856549] [2021-11-19 14:41:18,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240856549] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:41:18,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018210713] [2021-11-19 14:41:18,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:41:18,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:41:18,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:41:18,500 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:41:18,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 14:41:18,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-19 14:41:18,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:41:18,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:41:18,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:18,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:18,709 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:18,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018210713] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:41:18,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [385485850] [2021-11-19 14:41:18,713 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-19 14:41:18,714 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:41:18,714 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 14:41:18,714 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 14:41:18,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 14:41:18,726 INFO L180 QuantifierPusher]: treesize reduction 13, result has 81.2 percent of original size [2021-11-19 14:41:18,728 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-19 14:41:18,734 INFO L180 QuantifierPusher]: treesize reduction 7, result has 91.8 percent of original size [2021-11-19 14:41:18,739 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-19 14:41:18,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:18,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:18,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:18,774 INFO L180 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size [2021-11-19 14:41:18,785 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 14:41:18,787 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:41:18,792 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-11-19 14:41:18,794 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 144 [2021-11-19 14:41:18,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:18,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:18,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:18,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:18,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:18,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:18,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:18,864 INFO L180 QuantifierPusher]: treesize reduction 12, result has 77.8 percent of original size [2021-11-19 14:41:18,876 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-11-19 14:41:18,891 INFO L180 QuantifierPusher]: treesize reduction 12, result has 73.3 percent of original size [2021-11-19 14:41:18,895 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 14:41:18,896 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:41:18,899 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-19 14:41:18,899 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-19 14:41:18,905 INFO L180 QuantifierPusher]: treesize reduction 12, result has 77.8 percent of original size [2021-11-19 14:41:18,915 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-11-19 14:41:18,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:18,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:18,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:18,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:18,946 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-19 14:41:19,327 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 14:41:19,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:41:19,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-11-19 14:41:19,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755454792] [2021-11-19 14:41:19,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:41:19,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 14:41:19,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:41:19,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 14:41:19,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:41:19,330 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:19,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:19,542 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2021-11-19 14:41:19,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 14:41:19,543 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 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 [2021-11-19 14:41:19,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:19,548 INFO L225 Difference]: With dead ends: 86 [2021-11-19 14:41:19,548 INFO L226 Difference]: Without dead ends: 72 [2021-11-19 14:41:19,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-11-19 14:41:19,551 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 44 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:19,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 37 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:41:19,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-19 14:41:19,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 45. [2021-11-19 14:41:19,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:19,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2021-11-19 14:41:19,559 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 17 [2021-11-19 14:41:19,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:19,560 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2021-11-19 14:41:19,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:19,560 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2021-11-19 14:41:19,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-19 14:41:19,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:19,561 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:19,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:19,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-19 14:41:19,762 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:19,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:19,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1590027812, now seen corresponding path program 3 times [2021-11-19 14:41:19,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:41:19,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274564847] [2021-11-19 14:41:19,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:19,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:41:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:19,940 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:19,941 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:41:19,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274564847] [2021-11-19 14:41:19,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274564847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:41:19,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316551713] [2021-11-19 14:41:19,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:41:19,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:41:19,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:41:19,943 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:41:19,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 14:41:19,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:41:19,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:41:19,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:41:20,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:20,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:20,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316551713] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:41:20,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [268571054] [2021-11-19 14:41:20,484 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-19 14:41:20,484 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:41:20,484 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 14:41:20,485 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 14:41:20,485 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 14:41:20,511 INFO L180 QuantifierPusher]: treesize reduction 13, result has 81.2 percent of original size [2021-11-19 14:41:20,514 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-19 14:41:20,523 INFO L180 QuantifierPusher]: treesize reduction 7, result has 91.8 percent of original size [2021-11-19 14:41:20,532 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-19 14:41:20,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:20,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:20,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:20,588 INFO L180 QuantifierPusher]: treesize reduction 4, result has 97.5 percent of original size [2021-11-19 14:41:20,606 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 144 [2021-11-19 14:41:20,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:20,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:20,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:20,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:20,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:20,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:20,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:20,655 INFO L180 QuantifierPusher]: treesize reduction 12, result has 77.8 percent of original size [2021-11-19 14:41:20,660 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-11-19 14:41:20,669 INFO L180 QuantifierPusher]: treesize reduction 12, result has 73.3 percent of original size [2021-11-19 14:41:20,671 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 14:41:20,679 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:41:20,683 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-19 14:41:20,684 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-19 14:41:20,692 INFO L180 QuantifierPusher]: treesize reduction 12, result has 77.8 percent of original size [2021-11-19 14:41:20,703 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-11-19 14:41:20,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:20,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:20,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:20,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:20,723 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-19 14:41:21,088 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 14:41:21,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:41:21,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2021-11-19 14:41:21,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632396140] [2021-11-19 14:41:21,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:41:21,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-19 14:41:21,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:41:21,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-19 14:41:21,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 14:41:21,091 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:21,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:21,552 INFO L93 Difference]: Finished difference Result 206 states and 240 transitions. [2021-11-19 14:41:21,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 14:41:21,553 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 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 [2021-11-19 14:41:21,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:21,555 INFO L225 Difference]: With dead ends: 206 [2021-11-19 14:41:21,555 INFO L226 Difference]: Without dead ends: 180 [2021-11-19 14:41:21,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=1507, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 14:41:21,558 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 330 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:21,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 57 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:41:21,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-19 14:41:21,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 87. [2021-11-19 14:41:21,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1511627906976745) internal successors, (99), 86 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) [2021-11-19 14:41:21,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2021-11-19 14:41:21,569 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 29 [2021-11-19 14:41:21,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:21,570 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2021-11-19 14:41:21,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:21,570 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2021-11-19 14:41:21,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-19 14:41:21,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:21,572 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:21,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:21,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-19 14:41:21,787 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:21,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:21,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1362645920, now seen corresponding path program 4 times [2021-11-19 14:41:21,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:41:21,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490408463] [2021-11-19 14:41:21,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:21,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:41:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:22,202 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:41:22,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490408463] [2021-11-19 14:41:22,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490408463] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:41:22,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767787514] [2021-11-19 14:41:22,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:41:22,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:41:22,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:41:22,203 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:41:22,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 14:41:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:22,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-19 14:41:22,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:22,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:23,401 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:23,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767787514] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:41:23,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [222044410] [2021-11-19 14:41:23,404 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-19 14:41:23,404 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:41:23,405 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 14:41:23,405 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 14:41:23,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 14:41:23,412 INFO L180 QuantifierPusher]: treesize reduction 13, result has 81.2 percent of original size [2021-11-19 14:41:23,414 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-19 14:41:23,422 INFO L180 QuantifierPusher]: treesize reduction 7, result has 91.8 percent of original size [2021-11-19 14:41:23,427 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-19 14:41:23,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:23,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:23,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:23,451 INFO L180 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size [2021-11-19 14:41:23,458 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 14:41:23,460 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:41:23,463 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-11-19 14:41:23,465 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 144 [2021-11-19 14:41:23,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:23,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:23,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:23,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:23,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:23,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:23,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:23,492 INFO L180 QuantifierPusher]: treesize reduction 12, result has 77.8 percent of original size [2021-11-19 14:41:23,496 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-11-19 14:41:23,501 INFO L180 QuantifierPusher]: treesize reduction 12, result has 73.3 percent of original size [2021-11-19 14:41:23,504 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 14:41:23,505 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:41:23,508 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-19 14:41:23,508 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-19 14:41:23,513 INFO L180 QuantifierPusher]: treesize reduction 12, result has 77.8 percent of original size [2021-11-19 14:41:23,516 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-11-19 14:41:23,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:23,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:23,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:23,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:23,532 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-19 14:41:23,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 14:41:23,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:41:23,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2021-11-19 14:41:23,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981763628] [2021-11-19 14:41:23,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:41:23,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-19 14:41:23,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:41:23,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-19 14:41:23,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=2011, Unknown=0, NotChecked=0, Total=3306 [2021-11-19 14:41:23,916 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand has 51 states, 51 states have (on average 2.196078431372549) internal successors, (112), 50 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:25,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:25,244 INFO L93 Difference]: Finished difference Result 554 states and 624 transitions. [2021-11-19 14:41:25,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-19 14:41:25,244 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.196078431372549) internal successors, (112), 50 states have internal predecessors, (112), 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 53 [2021-11-19 14:41:25,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:25,248 INFO L225 Difference]: With dead ends: 554 [2021-11-19 14:41:25,248 INFO L226 Difference]: Without dead ends: 504 [2021-11-19 14:41:25,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1967, Invalid=4675, Unknown=0, NotChecked=0, Total=6642 [2021-11-19 14:41:25,254 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 482 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:25,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 111 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:41:25,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-11-19 14:41:25,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 171. [2021-11-19 14:41:25,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.1470588235294117) internal successors, (195), 170 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:25,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 195 transitions. [2021-11-19 14:41:25,277 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 195 transitions. Word has length 53 [2021-11-19 14:41:25,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:25,277 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 195 transitions. [2021-11-19 14:41:25,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.196078431372549) internal successors, (112), 50 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:25,278 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 195 transitions. [2021-11-19 14:41:25,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 14:41:25,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:25,282 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:25,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-19 14:41:25,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:41:25,507 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:25,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:25,507 INFO L85 PathProgramCache]: Analyzing trace with hash 569942824, now seen corresponding path program 5 times [2021-11-19 14:41:25,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:41:25,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716594174] [2021-11-19 14:41:25,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:25,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:41:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:26,865 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:41:26,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716594174] [2021-11-19 14:41:26,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716594174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:41:26,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036445550] [2021-11-19 14:41:26,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:41:26,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:41:26,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:41:26,871 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:41:26,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 14:41:27,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-19 14:41:27,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:41:27,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-19 14:41:27,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:27,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:30,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036445550] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:41:30,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [152169868] [2021-11-19 14:41:30,496 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-19 14:41:30,497 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:41:30,497 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 14:41:30,497 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 14:41:30,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 14:41:30,515 INFO L180 QuantifierPusher]: treesize reduction 13, result has 81.2 percent of original size [2021-11-19 14:41:30,516 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-19 14:41:30,522 INFO L180 QuantifierPusher]: treesize reduction 7, result has 91.8 percent of original size [2021-11-19 14:41:30,526 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-19 14:41:30,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:30,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:30,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:30,555 INFO L180 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size [2021-11-19 14:41:30,561 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 14:41:30,563 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:41:30,566 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-11-19 14:41:30,568 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 144 [2021-11-19 14:41:30,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:30,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:30,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:30,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:30,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:30,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:30,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:30,594 INFO L180 QuantifierPusher]: treesize reduction 12, result has 77.8 percent of original size [2021-11-19 14:41:30,597 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-11-19 14:41:30,601 INFO L180 QuantifierPusher]: treesize reduction 12, result has 73.3 percent of original size [2021-11-19 14:41:30,603 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 14:41:30,604 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:41:30,606 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-19 14:41:30,606 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-19 14:41:30,611 INFO L180 QuantifierPusher]: treesize reduction 12, result has 77.8 percent of original size [2021-11-19 14:41:30,614 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-11-19 14:41:30,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:30,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:30,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:30,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:30,632 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-19 14:41:31,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 14:41:31,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:41:31,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 98 [2021-11-19 14:41:31,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677552734] [2021-11-19 14:41:31,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:41:31,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-19 14:41:31,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:41:31,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-19 14:41:31,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4871, Invalid=6259, Unknown=0, NotChecked=0, Total=11130 [2021-11-19 14:41:31,151 INFO L87 Difference]: Start difference. First operand 171 states and 195 transitions. Second operand has 99 states, 99 states have (on average 2.101010101010101) internal successors, (208), 98 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:35,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:35,224 INFO L93 Difference]: Finished difference Result 1682 states and 1824 transitions. [2021-11-19 14:41:35,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-11-19 14:41:35,225 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.101010101010101) internal successors, (208), 98 states have internal predecessors, (208), 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 101 [2021-11-19 14:41:35,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:35,235 INFO L225 Difference]: With dead ends: 1682 [2021-11-19 14:41:35,235 INFO L226 Difference]: Without dead ends: 1584 [2021-11-19 14:41:35,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3825 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=7367, Invalid=16195, Unknown=0, NotChecked=0, Total=23562 [2021-11-19 14:41:35,246 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 1376 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 659 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1376 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 659 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:35,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1376 Valid, 210 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [659 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:41:35,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-11-19 14:41:35,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 339. [2021-11-19 14:41:35,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.1449704142011834) internal successors, (387), 338 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:35,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 387 transitions. [2021-11-19 14:41:35,282 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 387 transitions. Word has length 101 [2021-11-19 14:41:35,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:35,283 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 387 transitions. [2021-11-19 14:41:35,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.101010101010101) internal successors, (208), 98 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:35,283 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 387 transitions. [2021-11-19 14:41:35,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-19 14:41:35,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:35,291 INFO L514 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:35,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:35,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-11-19 14:41:35,515 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:35,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:35,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1568191032, now seen corresponding path program 6 times [2021-11-19 14:41:35,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:41:35,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753145068] [2021-11-19 14:41:35,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:35,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:41:35,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:39,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:39,580 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:41:39,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753145068] [2021-11-19 14:41:39,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753145068] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:41:39,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237230099] [2021-11-19 14:41:39,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:41:39,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:41:39,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:41:39,587 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:41:39,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 14:41:39,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:41:39,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:41:39,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-19 14:41:39,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:40,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:51,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:51,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237230099] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:41:51,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1861280206] [2021-11-19 14:41:51,007 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-19 14:41:51,007 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:41:51,007 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 14:41:51,007 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 14:41:51,007 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 14:41:51,015 INFO L180 QuantifierPusher]: treesize reduction 13, result has 81.2 percent of original size [2021-11-19 14:41:51,017 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-19 14:41:51,031 INFO L180 QuantifierPusher]: treesize reduction 7, result has 91.8 percent of original size [2021-11-19 14:41:51,034 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-19 14:41:51,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:51,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:51,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:51,064 INFO L180 QuantifierPusher]: treesize reduction 4, result has 97.7 percent of original size [2021-11-19 14:41:51,068 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 14:41:51,070 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:41:51,073 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-11-19 14:41:51,075 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 144 [2021-11-19 14:41:51,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:51,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:51,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:51,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:51,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:51,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:51,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:51,102 INFO L180 QuantifierPusher]: treesize reduction 12, result has 77.8 percent of original size [2021-11-19 14:41:51,105 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-11-19 14:41:51,109 INFO L180 QuantifierPusher]: treesize reduction 12, result has 73.3 percent of original size [2021-11-19 14:41:51,110 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 14:41:51,111 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:41:51,113 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-19 14:41:51,114 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-19 14:41:51,118 INFO L180 QuantifierPusher]: treesize reduction 12, result has 77.8 percent of original size [2021-11-19 14:41:51,121 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-11-19 14:41:51,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:51,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:51,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:51,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:41:51,138 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-19 14:41:51,676 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 14:41:51,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:41:51,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 194 [2021-11-19 14:41:51,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851163521] [2021-11-19 14:41:51,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:41:51,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 195 states [2021-11-19 14:41:51,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:41:51,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2021-11-19 14:41:51,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18935, Invalid=21667, Unknown=0, NotChecked=0, Total=40602 [2021-11-19 14:41:51,688 INFO L87 Difference]: Start difference. First operand 339 states and 387 transitions. Second operand has 195 states, 195 states have (on average 2.051282051282051) internal successors, (400), 194 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:42:16,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:42:16,177 INFO L93 Difference]: Finished difference Result 5666 states and 5952 transitions. [2021-11-19 14:42:16,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 288 states. [2021-11-19 14:42:16,178 INFO L78 Accepts]: Start accepts. Automaton has has 195 states, 195 states have (on average 2.051282051282051) internal successors, (400), 194 states have internal predecessors, (400), 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 197 [2021-11-19 14:42:16,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:42:16,205 INFO L225 Difference]: With dead ends: 5666 [2021-11-19 14:42:16,205 INFO L226 Difference]: Without dead ends: 5472 [2021-11-19 14:42:16,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 485 SyntacticMatches, 1 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12273 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=28535, Invalid=59971, Unknown=0, NotChecked=0, Total=88506 [2021-11-19 14:42:16,218 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 2830 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 1463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2830 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 2351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1463 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:42:16,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2830 Valid, 403 Invalid, 2351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1463 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 14:42:16,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5472 states. [2021-11-19 14:42:16,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5472 to 675. [2021-11-19 14:42:16,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 1.1439169139465875) internal successors, (771), 674 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:42:16,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 771 transitions. [2021-11-19 14:42:16,271 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 771 transitions. Word has length 197 [2021-11-19 14:42:16,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:42:16,271 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 771 transitions. [2021-11-19 14:42:16,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 195 states, 195 states have (on average 2.051282051282051) internal successors, (400), 194 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:42:16,272 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 771 transitions. [2021-11-19 14:42:16,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-11-19 14:42:16,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:42:16,282 INFO L514 BasicCegarLoop]: trace histogram [191, 190, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:42:16,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-19 14:42:16,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-11-19 14:42:16,507 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:42:16,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:42:16,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1812557736, now seen corresponding path program 7 times [2021-11-19 14:42:16,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:42:16,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179330574] [2021-11-19 14:42:16,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:42:16,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:42:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:42:29,921 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 36290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:42:29,921 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:42:29,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179330574] [2021-11-19 14:42:29,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179330574] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:42:29,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741154692] [2021-11-19 14:42:29,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:42:29,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:42:29,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:42:29,923 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:42:29,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 14:42:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:42:30,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 1560 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-19 14:42:30,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:42:56,106 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 36290 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:42:56,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:43:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 36290 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:43:06,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741154692] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:43:06,552 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:43:06,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [193, 193] imperfect sequences [193] total 475 [2021-11-19 14:43:06,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036650916] [2021-11-19 14:43:06,554 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:43:06,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 283 states [2021-11-19 14:43:06,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:43:06,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 283 interpolants. [2021-11-19 14:43:06,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58432, Invalid=166718, Unknown=0, NotChecked=0, Total=225150 [2021-11-19 14:43:06,587 INFO L87 Difference]: Start difference. First operand 675 states and 771 transitions. Second operand has 283 states, 283 states have (on average 2.021201413427562) internal successors, (572), 283 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:43:16,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:43:16,847 INFO L93 Difference]: Finished difference Result 27955 states and 28141 transitions. [2021-11-19 14:43:16,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-11-19 14:43:16,848 INFO L78 Accepts]: Start accepts. Automaton has has 283 states, 283 states have (on average 2.021201413427562) internal successors, (572), 283 states have internal predecessors, (572), 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 389 [2021-11-19 14:43:16,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:43:16,855 INFO L225 Difference]: With dead ends: 27955 [2021-11-19 14:43:16,855 INFO L226 Difference]: Without dead ends: 1198 [2021-11-19 14:43:16,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 969 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 473 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87780 ImplicationChecksByTransitivity, 46.6s TimeCoverageRelationStatistics Valid=58432, Invalid=166718, Unknown=0, NotChecked=0, Total=225150 [2021-11-19 14:43:16,897 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 769 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:43:16,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 1154 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:43:16,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2021-11-19 14:43:16,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1182. [2021-11-19 14:43:16,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 1.0076206604572395) internal successors, (1190), 1181 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:43:16,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1190 transitions. [2021-11-19 14:43:16,935 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1190 transitions. Word has length 389 [2021-11-19 14:43:16,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:43:16,935 INFO L470 AbstractCegarLoop]: Abstraction has 1182 states and 1190 transitions. [2021-11-19 14:43:16,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 283 states, 283 states have (on average 2.021201413427562) internal successors, (572), 283 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:43:16,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1190 transitions. [2021-11-19 14:43:16,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-11-19 14:43:16,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:43:16,947 INFO L514 BasicCegarLoop]: trace histogram [100, 99, 92, 91, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:43:16,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-19 14:43:17,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:43:17,171 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:43:17,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:43:17,172 INFO L85 PathProgramCache]: Analyzing trace with hash 502894182, now seen corresponding path program 1 times [2021-11-19 14:43:17,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:43:17,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034728153] [2021-11-19 14:43:17,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:43:17,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:43:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:43:32,424 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:43:32,425 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:43:32,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034728153] [2021-11-19 14:43:32,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034728153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:43:32,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338872330] [2021-11-19 14:43:32,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:43:32,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:43:32,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:43:32,427 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:43:32,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 14:43:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:43:32,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 1378 conjuncts, 194 conjunts are in the unsatisfiable core [2021-11-19 14:43:32,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:43:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:43:33,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:43:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:43:36,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338872330] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:43:36,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [425837443] [2021-11-19 14:43:36,669 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-19 14:43:36,670 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:43:36,670 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 14:43:36,671 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 14:43:36,671 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 14:43:36,683 INFO L180 QuantifierPusher]: treesize reduction 3, result has 95.9 percent of original size [2021-11-19 14:43:36,685 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-19 14:43:36,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:43:36,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:43:36,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:43:36,726 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:43:36,731 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-19 14:43:36,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:43:36,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:43:36,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:43:36,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:43:36,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:43:36,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:43:36,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:43:36,753 INFO L180 QuantifierPusher]: treesize reduction 12, result has 73.9 percent of original size [2021-11-19 14:43:36,756 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-19 14:43:36,760 INFO L180 QuantifierPusher]: treesize reduction 12, result has 71.4 percent of original size [2021-11-19 14:43:36,761 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 14:43:36,762 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:43:36,764 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-19 14:43:36,765 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-19 14:43:36,768 INFO L180 QuantifierPusher]: treesize reduction 4, result has 91.3 percent of original size [2021-11-19 14:43:36,771 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-19 14:43:36,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:43:36,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:43:36,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:43:36,783 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:43:36,792 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 14:43:36,793 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:43:36,796 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-19 14:43:36,797 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-11-19 14:43:36,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:43:36,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:43:36,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:43:36,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:43:36,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:43:36,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:43:36,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:43:36,818 INFO L180 QuantifierPusher]: treesize reduction 12, result has 77.8 percent of original size [2021-11-19 14:43:36,820 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-11-19 14:43:36,824 INFO L180 QuantifierPusher]: treesize reduction 12, result has 73.3 percent of original size [2021-11-19 14:43:36,825 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 14:43:36,826 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:43:36,828 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-19 14:43:36,829 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-19 14:43:36,833 INFO L180 QuantifierPusher]: treesize reduction 12, result has 77.8 percent of original size [2021-11-19 14:43:36,836 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-11-19 14:43:36,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:43:36,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:43:36,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:43:36,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:43:36,850 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-19 14:43:37,971 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 14:43:37,971 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:43:37,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 204 [2021-11-19 14:43:37,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700165753] [2021-11-19 14:43:37,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:43:37,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 205 states [2021-11-19 14:43:37,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:43:37,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 205 interpolants. [2021-11-19 14:43:37,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20533, Invalid=24199, Unknown=0, NotChecked=0, Total=44732 [2021-11-19 14:43:37,983 INFO L87 Difference]: Start difference. First operand 1182 states and 1190 transitions. Second operand has 205 states, 205 states have (on average 2.1219512195121952) internal successors, (435), 204 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:43:49,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:43:49,178 INFO L93 Difference]: Finished difference Result 2333 states and 2468 transitions. [2021-11-19 14:43:49,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2021-11-19 14:43:49,179 INFO L78 Accepts]: Start accepts. Automaton has has 205 states, 205 states have (on average 2.1219512195121952) internal successors, (435), 204 states have internal predecessors, (435), 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 389 [2021-11-19 14:43:49,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:43:49,180 INFO L225 Difference]: With dead ends: 2333 [2021-11-19 14:43:49,180 INFO L226 Difference]: Without dead ends: 0 [2021-11-19 14:43:49,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1367 GetRequests, 1146 SyntacticMatches, 2 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2575 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=20659, Invalid=27961, Unknown=0, NotChecked=0, Total=48620 [2021-11-19 14:43:49,187 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 1851 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 1471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1851 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1471 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:43:49,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1851 Valid, 320 Invalid, 1963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1471 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:43:49,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-19 14:43:49,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-19 14:43:49,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:43:49,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-19 14:43:49,190 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 389 [2021-11-19 14:43:49,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:43:49,190 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-19 14:43:49,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 205 states, 205 states have (on average 2.1219512195121952) internal successors, (435), 204 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:43:49,191 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-19 14:43:49,192 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-19 14:43:49,195 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-19 14:43:49,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-19 14:43:49,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:43:49,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-19 14:43:49,421 INFO L858 garLoopResultBuilder]: For program point L35-2(lines 34 38) no Hoare annotation was computed. [2021-11-19 14:43:49,421 INFO L858 garLoopResultBuilder]: For program point L35-3(lines 24 42) no Hoare annotation was computed. [2021-11-19 14:43:49,422 INFO L858 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-11-19 14:43:49,422 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-19 14:43:49,422 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-11-19 14:43:49,422 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-19 14:43:49,422 INFO L858 garLoopResultBuilder]: For program point L29(lines 29 31) no Hoare annotation was computed. [2021-11-19 14:43:49,423 INFO L858 garLoopResultBuilder]: For program point L29-2(lines 28 31) no Hoare annotation was computed. [2021-11-19 14:43:49,423 INFO L858 garLoopResultBuilder]: For program point L29-3(lines 24 42) no Hoare annotation was computed. [2021-11-19 14:43:49,423 INFO L858 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-11-19 14:43:49,423 INFO L861 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-11-19 14:43:49,423 INFO L861 garLoopResultBuilder]: At program point L39(lines 24 42) the Hoare annotation is: true [2021-11-19 14:43:49,423 INFO L858 garLoopResultBuilder]: For program point L35(lines 35 38) no Hoare annotation was computed. [2021-11-19 14:43:49,427 INFO L732 BasicCegarLoop]: Path program histogram: [7, 1, 1, 1] [2021-11-19 14:43:49,429 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 14:43:49,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 02:43:49 BoogieIcfgContainer [2021-11-19 14:43:49,439 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 14:43:49,440 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 14:43:49,440 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 14:43:49,440 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 14:43:49,440 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:41:16" (3/4) ... [2021-11-19 14:43:49,443 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-19 14:43:49,454 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-11-19 14:43:49,455 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-19 14:43:49,455 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-19 14:43:49,455 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-19 14:43:49,496 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/witness.graphml [2021-11-19 14:43:49,496 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 14:43:49,497 INFO L158 Benchmark]: Toolchain (without parser) took 154185.13ms. Allocated memory was 144.7MB in the beginning and 1.8GB in the end (delta: 1.7GB). Free memory was 112.1MB in the beginning and 1.0GB in the end (delta: -888.0MB). Peak memory consumption was 796.6MB. Max. memory is 16.1GB. [2021-11-19 14:43:49,498 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 83.9MB. Free memory was 37.2MB in the beginning and 37.1MB in the end (delta: 43.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:43:49,498 INFO L158 Benchmark]: CACSL2BoogieTranslator took 321.29ms. Allocated memory is still 144.7MB. Free memory was 112.1MB in the beginning and 120.2MB in the end (delta: -8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 14:43:49,499 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.65ms. Allocated memory is still 144.7MB. Free memory was 120.2MB in the beginning and 118.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:43:49,499 INFO L158 Benchmark]: Boogie Preprocessor took 22.60ms. Allocated memory is still 144.7MB. Free memory was 118.7MB in the beginning and 117.7MB in the end (delta: 975.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 14:43:49,500 INFO L158 Benchmark]: RCFGBuilder took 406.44ms. Allocated memory is still 144.7MB. Free memory was 117.7MB in the beginning and 108.2MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 14:43:49,501 INFO L158 Benchmark]: TraceAbstraction took 153333.21ms. Allocated memory was 144.7MB in the beginning and 1.8GB in the end (delta: 1.7GB). Free memory was 107.6MB in the beginning and 1.0GB in the end (delta: -895.7MB). Peak memory consumption was 788.9MB. Max. memory is 16.1GB. [2021-11-19 14:43:49,501 INFO L158 Benchmark]: Witness Printer took 56.85ms. Allocated memory is still 1.8GB. Free memory was 1.0GB in the beginning and 1.0GB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-19 14:43:49,504 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 83.9MB. Free memory was 37.2MB in the beginning and 37.1MB in the end (delta: 43.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 321.29ms. Allocated memory is still 144.7MB. Free memory was 112.1MB in the beginning and 120.2MB in the end (delta: -8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.65ms. Allocated memory is still 144.7MB. Free memory was 120.2MB in the beginning and 118.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 22.60ms. Allocated memory is still 144.7MB. Free memory was 118.7MB in the beginning and 117.7MB in the end (delta: 975.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 406.44ms. Allocated memory is still 144.7MB. Free memory was 117.7MB in the beginning and 108.2MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 153333.21ms. Allocated memory was 144.7MB in the beginning and 1.8GB in the end (delta: 1.7GB). Free memory was 107.6MB in the beginning and 1.0GB in the end (delta: -895.7MB). Peak memory consumption was 788.9MB. Max. memory is 16.1GB. * Witness Printer took 56.85ms. Allocated memory is still 1.8GB. Free memory was 1.0GB in the beginning and 1.0GB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 153.2s, OverallIterations: 10, TraceHistogramMax: 191, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.1s, AutomataDifference: 52.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7709 SdHoareTripleChecker+Valid, 5.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7709 mSDsluCounter, 2334 SdHoareTripleChecker+Invalid, 4.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2102 mSDsCounter, 4034 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3358 IncrementalHoareTripleChecker+Invalid, 7392 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4034 mSolverCounterUnsat, 242 mSDtfsCounter, 3358 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3938 GetRequests, 2620 SyntacticMatches, 8 SemanticMatches, 1310 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108597 ImplicationChecksByTransitivity, 94.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1182occurred in iteration=9, InterpolantAutomatonStates: 977, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 6524 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 90.8s InterpolantComputationTime, 2388 NumberOfCodeBlocks, 2388 NumberOfCodeBlocksAsserted, 70 NumberOfCheckSat, 3548 ConstructedInterpolants, 0 QuantifiedInterpolants, 10935 SizeOfPredicates, 14 NumberOfNonLiveVariables, 4594 ConjunctsInSsa, 587 ConjunctsInUnsatCore, 26 InterpolantComputations, 4 PerfectInterpolantSequences, 72580/198876 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-19 14:43:49,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e07e155-2a57-41ee-b989-5901ae0f0bdc/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE