./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 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/string_concat-noarr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF --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-63182f1 [2021-11-13 02:34:39,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:34:39,409 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:34:39,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:34:39,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:34:39,477 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:34:39,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:34:39,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:34:39,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:34:39,492 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:34:39,493 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:34:39,495 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:34:39,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:34:39,499 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:34:39,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:34:39,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:34:39,512 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:34:39,513 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:34:39,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:34:39,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:34:39,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:34:39,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:34:39,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:34:39,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:34:39,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:34:39,544 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:34:39,545 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:34:39,547 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:34:39,548 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:34:39,549 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:34:39,550 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:34:39,551 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:34:39,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:34:39,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:34:39,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:34:39,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:34:39,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:34:39,557 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:34:39,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:34:39,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:34:39,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:34:39,560 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 02:34:39,609 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:34:39,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:34:39,611 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:34:39,611 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:34:39,611 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:34:39,611 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:34:39,612 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:34:39,612 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:34:39,612 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:34:39,612 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:34:39,620 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:34:39,620 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:34:39,620 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:34:39,621 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:34:39,621 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:34:39,621 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:34:39,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:34:39,622 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:34:39,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:34:39,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:34:39,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:34:39,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:34:39,623 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:34:39,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:34:39,624 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:34:39,624 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:34:39,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:34:39,625 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:34:39,625 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:34:39,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:34:39,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:34:39,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:34:39,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:34:39,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:34:39,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:34:39,628 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:34:39,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:34:39,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:34:39,629 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:34:39,629 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:34:39,630 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_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30a4b942034eaa47a8fcc8fdf4549d1d63a9a60d59b585da2a353c9626604750 [2021-11-13 02:34:39,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:34:39,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:34:39,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:34:39,952 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:34:39,953 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:34:39,954 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/loop-invgen/string_concat-noarr.i [2021-11-13 02:34:40,023 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/data/c2ef5d386/c15e18c84edc4a7ca700b8f513dbebca/FLAGd8ab9b7db [2021-11-13 02:34:40,520 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:34:40,521 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/sv-benchmarks/c/loop-invgen/string_concat-noarr.i [2021-11-13 02:34:40,531 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/data/c2ef5d386/c15e18c84edc4a7ca700b8f513dbebca/FLAGd8ab9b7db [2021-11-13 02:34:40,873 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/data/c2ef5d386/c15e18c84edc4a7ca700b8f513dbebca [2021-11-13 02:34:40,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:34:40,877 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:34:40,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:34:40,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:34:40,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:34:40,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:34:40" (1/1) ... [2021-11-13 02:34:40,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54e7b1c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:40, skipping insertion in model container [2021-11-13 02:34:40,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:34:40" (1/1) ... [2021-11-13 02:34:40,903 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:34:40,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:34:41,099 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/sv-benchmarks/c/loop-invgen/string_concat-noarr.i[893,906] [2021-11-13 02:34:41,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:34:41,117 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:34:41,130 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/sv-benchmarks/c/loop-invgen/string_concat-noarr.i[893,906] [2021-11-13 02:34:41,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:34:41,145 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:34:41,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:41 WrapperNode [2021-11-13 02:34:41,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:34:41,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:34:41,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:34:41,146 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:34:41,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:41" (1/1) ... [2021-11-13 02:34:41,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:41" (1/1) ... [2021-11-13 02:34:41,177 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:34:41,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:34:41,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:34:41,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:34:41,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:41" (1/1) ... [2021-11-13 02:34:41,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:41" (1/1) ... [2021-11-13 02:34:41,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:41" (1/1) ... [2021-11-13 02:34:41,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:41" (1/1) ... [2021-11-13 02:34:41,191 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:41" (1/1) ... [2021-11-13 02:34:41,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:41" (1/1) ... [2021-11-13 02:34:41,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:41" (1/1) ... [2021-11-13 02:34:41,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:34:41,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:34:41,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:34:41,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:34:41,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:41" (1/1) ... [2021-11-13 02:34:41,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:34:41,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:41,232 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:34:41,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:34:41,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 02:34:41,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:34:41,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:34:41,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:34:41,468 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:34:41,468 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 02:34:41,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:34:41 BoogieIcfgContainer [2021-11-13 02:34:41,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:34:41,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:34:41,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:34:41,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:34:41,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:34:40" (1/3) ... [2021-11-13 02:34:41,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a62320a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:34:41, skipping insertion in model container [2021-11-13 02:34:41,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:41" (2/3) ... [2021-11-13 02:34:41,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a62320a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:34:41, skipping insertion in model container [2021-11-13 02:34:41,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:34:41" (3/3) ... [2021-11-13 02:34:41,480 INFO L111 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.i [2021-11-13 02:34:41,485 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:34:41,485 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:34:41,536 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:34:41,544 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 [2021-11-13 02:34:41,544 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:34:41,559 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) [2021-11-13 02:34:41,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-13 02:34:41,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:41,565 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:41,566 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:41,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:41,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1248656439, now seen corresponding path program 1 times [2021-11-13 02:34:41,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:41,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465407240] [2021-11-13 02:34:41,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:41,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:41,716 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:41,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465407240] [2021-11-13 02:34:41,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465407240] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:41,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:41,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 02:34:41,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794998448] [2021-11-13 02:34:41,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:41,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 02:34:41,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:41,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 02:34:41,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:34:41,756 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) [2021-11-13 02:34:41,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:41,777 INFO L93 Difference]: Finished difference Result 23 states and 33 transitions. [2021-11-13 02:34:41,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 02:34:41,779 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 [2021-11-13 02:34:41,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:41,787 INFO L225 Difference]: With dead ends: 23 [2021-11-13 02:34:41,787 INFO L226 Difference]: Without dead ends: 10 [2021-11-13 02:34:41,790 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 [2021-11-13 02:34:41,795 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.46ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.48ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:41,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 2 Unknown, 0 Unchecked, 0.46ms Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 6.48ms Time] [2021-11-13 02:34:41,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-13 02:34:41,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-13 02:34:41,827 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) [2021-11-13 02:34:41,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-13 02:34:41,829 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2021-11-13 02:34:41,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:41,830 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-13 02:34:41,830 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) [2021-11-13 02:34:41,830 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-13 02:34:41,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-13 02:34:41,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:41,831 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:41,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 02:34:41,832 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:41,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:41,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1788682382, now seen corresponding path program 1 times [2021-11-13 02:34:41,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:41,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599209153] [2021-11-13 02:34:41,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:41,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:41,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:41,923 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:41,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599209153] [2021-11-13 02:34:41,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599209153] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:41,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:41,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:34:41,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007182392] [2021-11-13 02:34:41,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:41,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:34:41,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:41,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:34:41,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:34:41,928 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) [2021-11-13 02:34:41,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:41,971 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-11-13 02:34:41,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:34:41,972 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 [2021-11-13 02:34:41,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:41,973 INFO L225 Difference]: With dead ends: 19 [2021-11-13 02:34:41,974 INFO L226 Difference]: Without dead ends: 15 [2021-11-13 02:34:41,974 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 [2021-11-13 02:34:41,977 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.90ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.54ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:41,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 11 Invalid, 21 Unknown, 0 Unchecked, 0.90ms Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 27.54ms Time] [2021-11-13 02:34:41,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-13 02:34:41,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2021-11-13 02:34:41,982 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) [2021-11-13 02:34:41,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-13 02:34:41,983 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2021-11-13 02:34:41,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:41,984 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-13 02:34:41,984 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) [2021-11-13 02:34:41,984 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-13 02:34:41,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 02:34:41,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:41,985 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:41,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 02:34:41,986 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:41,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:41,987 INFO L85 PathProgramCache]: Analyzing trace with hash 981712553, now seen corresponding path program 1 times [2021-11-13 02:34:41,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:41,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041603062] [2021-11-13 02:34:41,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:41,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:42,117 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:42,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041603062] [2021-11-13 02:34:42,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041603062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:42,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110498449] [2021-11-13 02:34:42,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:42,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:42,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:42,121 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:42,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 02:34:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:42,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:34:42,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:42,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:42,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110498449] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:42,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1312993990] [2021-11-13 02:34:42,466 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-13 02:34:42,467 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:34:42,472 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 02:34:42,479 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 02:34:42,480 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 02:34:42,524 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:42,530 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:34:42,532 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:42,532 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-13 02:34:42,539 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:34:42,540 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:42,541 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-13 02:34:42,548 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-11-13 02:34:42,581 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_8|], 10=[|v_#valid_9|]} [2021-11-13 02:34:42,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:34:42,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-13 02:34:42,614 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:42,615 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-13 02:34:42,616 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:42,618 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-13 02:34:42,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:34:42,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:42,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:42,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:34:42,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:34:42,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:34:42,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:34:42,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-13 02:34:42,680 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:42,683 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 02:34:42,685 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:42,686 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 02:34:42,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:34:42,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:42,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:42,704 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:42,706 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-11-13 02:34:42,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:34:42,708 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:74 [2021-11-13 02:34:42,722 INFO L180 QuantifierPusher]: treesize reduction 13, result has 85.7 percent of original size [2021-11-13 02:34:42,731 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-11-13 02:34:42,750 INFO L180 QuantifierPusher]: treesize reduction 7, result has 93.5 percent of original size [2021-11-13 02:34:42,759 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-13 02:34:42,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:42,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:42,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:42,954 INFO L180 QuantifierPusher]: treesize reduction 4, result has 98.2 percent of original size [2021-11-13 02:34:42,980 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 206 [2021-11-13 02:34:43,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:43,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:43,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:43,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:43,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:43,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:43,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:43,068 INFO L180 QuantifierPusher]: treesize reduction 24, result has 69.2 percent of original size [2021-11-13 02:34:43,073 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-13 02:34:43,080 INFO L180 QuantifierPusher]: treesize reduction 24, result has 65.2 percent of original size [2021-11-13 02:34:43,097 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:34:43,098 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:43,101 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:34:43,103 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-13 02:34:43,111 INFO L180 QuantifierPusher]: treesize reduction 24, result has 69.2 percent of original size [2021-11-13 02:34:43,116 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-13 02:34:43,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:43,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:43,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:43,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:43,156 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 02:34:43,840 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 02:34:43,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:34:43,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-13 02:34:43,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536297999] [2021-11-13 02:34:43,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:34:43,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 02:34:43,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:43,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 02:34:43,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:34:43,843 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) [2021-11-13 02:34:43,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:43,958 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-11-13 02:34:43,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:34:43,959 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 [2021-11-13 02:34:43,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:43,960 INFO L225 Difference]: With dead ends: 42 [2021-11-13 02:34:43,960 INFO L226 Difference]: Without dead ends: 34 [2021-11-13 02:34:43,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-11-13 02:34:43,963 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 26 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.44ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.03ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:43,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 17 Invalid, 52 Unknown, 0 Unchecked, 2.44ms Time], IncrementalHoareTripleChecker [15 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 67.03ms Time] [2021-11-13 02:34:43,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-13 02:34:43,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2021-11-13 02:34:43,968 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) [2021-11-13 02:34:43,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-13 02:34:43,969 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 11 [2021-11-13 02:34:43,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:43,969 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-13 02:34:43,970 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) [2021-11-13 02:34:43,970 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-13 02:34:43,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-13 02:34:43,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:43,971 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:44,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:44,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:44,187 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:44,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:44,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1147123834, now seen corresponding path program 2 times [2021-11-13 02:34:44,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:44,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149893482] [2021-11-13 02:34:44,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:44,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:44,269 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:44,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149893482] [2021-11-13 02:34:44,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149893482] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:44,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541303060] [2021-11-13 02:34:44,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:34:44,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:44,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:44,279 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:44,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 02:34:44,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-13 02:34:44,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:34:44,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:34:44,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:44,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:44,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541303060] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:44,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1941182702] [2021-11-13 02:34:44,555 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-13 02:34:44,555 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:34:44,555 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 02:34:44,556 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 02:34:44,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 02:34:44,563 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:44,564 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:34:44,565 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:44,565 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-13 02:34:44,566 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:34:44,567 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:44,568 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-13 02:34:44,569 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-11-13 02:34:44,573 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 10=[|v_#valid_10|]} [2021-11-13 02:34:44,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:34:44,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-13 02:34:44,581 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:44,582 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-13 02:34:44,582 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:44,583 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-13 02:34:44,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:34:44,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:44,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:44,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:34:44,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:34:44,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:34:44,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:34:44,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-13 02:34:44,616 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:44,617 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 02:34:44,618 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:44,619 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 02:34:44,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:34:44,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:44,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:44,624 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:44,626 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-11-13 02:34:44,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:34:44,626 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:74 [2021-11-13 02:34:44,633 INFO L180 QuantifierPusher]: treesize reduction 13, result has 85.7 percent of original size [2021-11-13 02:34:44,636 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-11-13 02:34:44,645 INFO L180 QuantifierPusher]: treesize reduction 7, result has 93.5 percent of original size [2021-11-13 02:34:44,652 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-11-13 02:34:44,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:44,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:44,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:44,711 INFO L180 QuantifierPusher]: treesize reduction 4, result has 98.3 percent of original size [2021-11-13 02:34:44,723 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:34:44,726 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:44,733 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-11-13 02:34:44,737 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 206 [2021-11-13 02:34:44,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:44,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:44,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:44,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:44,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:44,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:44,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:44,800 INFO L180 QuantifierPusher]: treesize reduction 24, result has 69.2 percent of original size [2021-11-13 02:34:44,805 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-13 02:34:44,810 INFO L180 QuantifierPusher]: treesize reduction 24, result has 65.2 percent of original size [2021-11-13 02:34:44,814 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:34:44,815 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:44,819 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:34:44,820 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-13 02:34:44,827 INFO L180 QuantifierPusher]: treesize reduction 24, result has 69.2 percent of original size [2021-11-13 02:34:44,832 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-13 02:34:44,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:44,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:44,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:44,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:44,866 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 02:34:45,510 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 02:34:45,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:34:45,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-11-13 02:34:45,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830551889] [2021-11-13 02:34:45,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:34:45,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 02:34:45,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:45,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 02:34:45,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2021-11-13 02:34:45,513 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) [2021-11-13 02:34:45,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:45,702 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2021-11-13 02:34:45,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 02:34:45,703 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 [2021-11-13 02:34:45,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:45,706 INFO L225 Difference]: With dead ends: 86 [2021-11-13 02:34:45,706 INFO L226 Difference]: Without dead ends: 72 [2021-11-13 02:34:45,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-11-13 02:34:45,708 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 44 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.81ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 94.98ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:45,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 37 Invalid, 101 Unknown, 0 Unchecked, 2.81ms Time], IncrementalHoareTripleChecker [31 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 94.98ms Time] [2021-11-13 02:34:45,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-13 02:34:45,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 45. [2021-11-13 02:34:45,716 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) [2021-11-13 02:34:45,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2021-11-13 02:34:45,717 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 17 [2021-11-13 02:34:45,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:45,718 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2021-11-13 02:34:45,718 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) [2021-11-13 02:34:45,718 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2021-11-13 02:34:45,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-13 02:34:45,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:45,720 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:45,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:45,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:45,945 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:45,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:45,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1590027812, now seen corresponding path program 3 times [2021-11-13 02:34:45,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:45,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203268216] [2021-11-13 02:34:45,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:45,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:46,153 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:46,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203268216] [2021-11-13 02:34:46,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203268216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:46,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704801861] [2021-11-13 02:34:46,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:34:46,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:46,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:46,163 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:46,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 02:34:46,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 02:34:46,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:34:46,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 02:34:46,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:46,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:46,626 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:46,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704801861] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:46,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [99936037] [2021-11-13 02:34:46,629 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-13 02:34:46,629 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:34:46,629 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 02:34:46,630 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 02:34:46,630 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 02:34:46,637 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:46,638 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:34:46,639 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:46,640 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-13 02:34:46,640 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:34:46,641 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:46,641 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-13 02:34:46,643 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-11-13 02:34:46,646 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 10=[|v_#valid_11|]} [2021-11-13 02:34:46,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:34:46,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-13 02:34:46,653 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:46,654 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-13 02:34:46,654 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:46,655 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-13 02:34:46,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:34:46,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:46,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:46,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:34:46,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:34:46,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:34:46,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:34:46,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-13 02:34:46,670 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:46,672 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 02:34:46,673 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:46,673 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 02:34:46,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:34:46,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:46,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:46,678 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:46,680 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-11-13 02:34:46,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:34:46,681 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:74 [2021-11-13 02:34:46,689 INFO L180 QuantifierPusher]: treesize reduction 13, result has 85.7 percent of original size [2021-11-13 02:34:46,691 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-11-13 02:34:46,700 INFO L180 QuantifierPusher]: treesize reduction 7, result has 93.5 percent of original size [2021-11-13 02:34:46,705 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-11-13 02:34:46,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:46,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:46,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:46,750 INFO L180 QuantifierPusher]: treesize reduction 4, result has 98.3 percent of original size [2021-11-13 02:34:46,763 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:34:46,767 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:46,774 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-11-13 02:34:46,779 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 206 [2021-11-13 02:34:46,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:46,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:46,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:46,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:46,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:46,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:46,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:46,833 INFO L180 QuantifierPusher]: treesize reduction 24, result has 69.2 percent of original size [2021-11-13 02:34:46,837 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-13 02:34:46,842 INFO L180 QuantifierPusher]: treesize reduction 24, result has 65.2 percent of original size [2021-11-13 02:34:46,845 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:34:46,845 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:46,848 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:34:46,849 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-13 02:34:46,854 INFO L180 QuantifierPusher]: treesize reduction 24, result has 69.2 percent of original size [2021-11-13 02:34:46,858 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-13 02:34:46,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:46,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:46,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:46,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:46,883 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 02:34:47,471 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 02:34:47,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:34:47,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2021-11-13 02:34:47,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050190243] [2021-11-13 02:34:47,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:34:47,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-13 02:34:47,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:47,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-13 02:34:47,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 02:34:47,475 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) [2021-11-13 02:34:47,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:47,930 INFO L93 Difference]: Finished difference Result 206 states and 240 transitions. [2021-11-13 02:34:47,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-13 02:34:47,930 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 [2021-11-13 02:34:47,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:47,932 INFO L225 Difference]: With dead ends: 206 [2021-11-13 02:34:47,933 INFO L226 Difference]: Without dead ends: 180 [2021-11-13 02:34:47,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=563, Invalid=1507, Unknown=0, NotChecked=0, Total=2070 [2021-11-13 02:34:47,935 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 330 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 164.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.99ms SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 201.96ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:47,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 57 Invalid, 263 Unknown, 0 Unchecked, 4.99ms Time], IncrementalHoareTripleChecker [137 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 201.96ms Time] [2021-11-13 02:34:47,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-13 02:34:47,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 87. [2021-11-13 02:34:47,945 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) [2021-11-13 02:34:47,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2021-11-13 02:34:47,947 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 29 [2021-11-13 02:34:47,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:47,947 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2021-11-13 02:34:47,948 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) [2021-11-13 02:34:47,948 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2021-11-13 02:34:47,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-13 02:34:47,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:47,950 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:47,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:48,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-13 02:34:48,175 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:48,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:48,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1362645920, now seen corresponding path program 4 times [2021-11-13 02:34:48,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:48,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396835800] [2021-11-13 02:34:48,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:48,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:48,578 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:48,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396835800] [2021-11-13 02:34:48,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396835800] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:48,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735179877] [2021-11-13 02:34:48,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 02:34:48,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:48,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:48,580 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:48,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 02:34:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:48,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-13 02:34:48,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:48,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:49,779 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:49,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735179877] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:49,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [378284270] [2021-11-13 02:34:49,782 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-13 02:34:49,782 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:34:49,782 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 02:34:49,783 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 02:34:49,783 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 02:34:49,788 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:49,789 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:34:49,789 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:49,790 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-13 02:34:49,790 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:34:49,791 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:49,791 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-13 02:34:49,792 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-11-13 02:34:49,796 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 10=[|v_#valid_12|]} [2021-11-13 02:34:49,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:34:49,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-13 02:34:49,804 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:49,804 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-13 02:34:49,805 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:49,805 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-13 02:34:49,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:34:49,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:49,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:49,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:34:49,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:34:49,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:34:49,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:34:49,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-13 02:34:49,820 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:49,822 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 02:34:49,822 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:49,823 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 02:34:49,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:34:49,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:49,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:49,827 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:49,828 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-11-13 02:34:49,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:34:49,829 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:74 [2021-11-13 02:34:49,834 INFO L180 QuantifierPusher]: treesize reduction 13, result has 85.7 percent of original size [2021-11-13 02:34:49,836 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-11-13 02:34:49,842 INFO L180 QuantifierPusher]: treesize reduction 7, result has 93.5 percent of original size [2021-11-13 02:34:49,846 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-11-13 02:34:49,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:49,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:49,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:49,887 INFO L180 QuantifierPusher]: treesize reduction 4, result has 98.3 percent of original size [2021-11-13 02:34:49,894 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:34:49,896 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:49,900 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-11-13 02:34:49,903 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 206 [2021-11-13 02:34:49,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:49,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:49,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:49,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:49,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:49,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:49,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:49,955 INFO L180 QuantifierPusher]: treesize reduction 24, result has 69.2 percent of original size [2021-11-13 02:34:49,960 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-13 02:34:49,965 INFO L180 QuantifierPusher]: treesize reduction 24, result has 65.2 percent of original size [2021-11-13 02:34:49,967 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:34:49,968 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:49,970 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:34:49,971 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-13 02:34:49,976 INFO L180 QuantifierPusher]: treesize reduction 24, result has 69.2 percent of original size [2021-11-13 02:34:49,982 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-13 02:34:49,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:49,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:49,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:49,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:50,008 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 02:34:50,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 02:34:50,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:34:50,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2021-11-13 02:34:50,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278050067] [2021-11-13 02:34:50,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:34:50,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-13 02:34:50,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:50,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-13 02:34:50,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=2011, Unknown=0, NotChecked=0, Total=3306 [2021-11-13 02:34:50,649 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) [2021-11-13 02:34:51,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:51,722 INFO L93 Difference]: Finished difference Result 554 states and 624 transitions. [2021-11-13 02:34:51,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-13 02:34:51,724 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 [2021-11-13 02:34:51,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:51,727 INFO L225 Difference]: With dead ends: 554 [2021-11-13 02:34:51,728 INFO L226 Difference]: Without dead ends: 504 [2021-11-13 02:34:51,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1967, Invalid=4675, Unknown=0, NotChecked=0, Total=6642 [2021-11-13 02:34:51,731 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 482 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 277.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.92ms SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 384.43ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:51,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 111 Invalid, 486 Unknown, 0 Unchecked, 5.92ms Time], IncrementalHoareTripleChecker [252 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 384.43ms Time] [2021-11-13 02:34:51,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-11-13 02:34:51,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 171. [2021-11-13 02:34:51,762 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) [2021-11-13 02:34:51,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 195 transitions. [2021-11-13 02:34:51,770 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 195 transitions. Word has length 53 [2021-11-13 02:34:51,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:51,770 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 195 transitions. [2021-11-13 02:34:51,771 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) [2021-11-13 02:34:51,771 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 195 transitions. [2021-11-13 02:34:51,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-13 02:34:51,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:51,780 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:51,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:51,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:51,995 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:51,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:51,995 INFO L85 PathProgramCache]: Analyzing trace with hash 569942824, now seen corresponding path program 5 times [2021-11-13 02:34:51,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:51,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695583278] [2021-11-13 02:34:51,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:51,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:52,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:53,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:53,092 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:53,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695583278] [2021-11-13 02:34:53,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695583278] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:53,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483465391] [2021-11-13 02:34:53,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:34:53,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:53,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:53,094 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:53,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 02:34:53,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-13 02:34:53,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:34:53,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-13 02:34:53,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:53,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:56,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483465391] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:56,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [102371815] [2021-11-13 02:34:56,378 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-13 02:34:56,378 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:34:56,378 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 02:34:56,378 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 02:34:56,379 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 02:34:56,389 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:56,390 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:34:56,391 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:56,393 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-13 02:34:56,393 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:34:56,393 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:56,394 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-13 02:34:56,394 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-11-13 02:34:56,396 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_12|], 10=[|v_#valid_13|]} [2021-11-13 02:34:56,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:34:56,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-13 02:34:56,401 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:56,402 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-13 02:34:56,402 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:56,403 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-13 02:34:56,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:34:56,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:56,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:56,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:34:56,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:34:56,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:34:56,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:34:56,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-13 02:34:56,430 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:56,435 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 02:34:56,436 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:56,436 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 02:34:56,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:34:56,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:56,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:56,445 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:56,446 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-11-13 02:34:56,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:34:56,447 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:74 [2021-11-13 02:34:56,466 INFO L180 QuantifierPusher]: treesize reduction 13, result has 85.7 percent of original size [2021-11-13 02:34:56,467 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-11-13 02:34:56,473 INFO L180 QuantifierPusher]: treesize reduction 7, result has 93.5 percent of original size [2021-11-13 02:34:56,476 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-11-13 02:34:56,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:56,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:56,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:56,525 INFO L180 QuantifierPusher]: treesize reduction 4, result has 98.3 percent of original size [2021-11-13 02:34:56,541 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:34:56,543 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:56,547 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-11-13 02:34:56,549 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 206 [2021-11-13 02:34:56,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:56,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:56,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:56,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:56,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:56,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:56,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:56,589 INFO L180 QuantifierPusher]: treesize reduction 24, result has 69.2 percent of original size [2021-11-13 02:34:56,592 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-13 02:34:56,595 INFO L180 QuantifierPusher]: treesize reduction 24, result has 65.2 percent of original size [2021-11-13 02:34:56,597 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:34:56,598 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:56,600 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:34:56,600 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-13 02:34:56,605 INFO L180 QuantifierPusher]: treesize reduction 24, result has 69.2 percent of original size [2021-11-13 02:34:56,608 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-13 02:34:56,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:56,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:56,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:56,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:34:56,631 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 02:34:57,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 02:34:57,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:34:57,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 98 [2021-11-13 02:34:57,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397749287] [2021-11-13 02:34:57,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:34:57,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-13 02:34:57,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:57,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-13 02:34:57,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4871, Invalid=6259, Unknown=0, NotChecked=0, Total=11130 [2021-11-13 02:34:57,296 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) [2021-11-13 02:35:00,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:00,755 INFO L93 Difference]: Finished difference Result 1682 states and 1824 transitions. [2021-11-13 02:35:00,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-11-13 02:35:00,756 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 [2021-11-13 02:35:00,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:00,764 INFO L225 Difference]: With dead ends: 1682 [2021-11-13 02:35:00,765 INFO L226 Difference]: Without dead ends: 1584 [2021-11-13 02:35:00,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3825 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=7367, Invalid=16195, Unknown=0, NotChecked=0, Total=23562 [2021-11-13 02:35:00,774 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 1376 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 659 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 538.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1376 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.59ms SdHoareTripleChecker+Time, 659 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 701.72ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:00,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1376 Valid, 210 Invalid, 1117 Unknown, 0 Unchecked, 13.59ms Time], IncrementalHoareTripleChecker [659 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 701.72ms Time] [2021-11-13 02:35:00,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-11-13 02:35:00,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 339. [2021-11-13 02:35:00,807 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) [2021-11-13 02:35:00,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 387 transitions. [2021-11-13 02:35:00,809 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 387 transitions. Word has length 101 [2021-11-13 02:35:00,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:00,809 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 387 transitions. [2021-11-13 02:35:00,810 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) [2021-11-13 02:35:00,810 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 387 transitions. [2021-11-13 02:35:00,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-13 02:35:00,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:00,814 INFO L514 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:35:00,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:01,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:35:01,027 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:01,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:01,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1568191032, now seen corresponding path program 6 times [2021-11-13 02:35:01,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:35:01,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557713759] [2021-11-13 02:35:01,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:01,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:35:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:35:04,417 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:35:04,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557713759] [2021-11-13 02:35:04,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557713759] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:35:04,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770635058] [2021-11-13 02:35:04,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:35:04,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:35:04,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:35:04,439 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:35:04,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 02:35:04,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 02:35:04,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:35:04,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-13 02:35:04,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:05,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:35:05,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:35:14,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770635058] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:35:14,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1946787404] [2021-11-13 02:35:14,710 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-13 02:35:14,710 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:35:14,711 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 02:35:14,711 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 02:35:14,711 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 02:35:14,736 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:35:14,737 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:35:14,738 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:35:14,739 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-13 02:35:14,739 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:35:14,740 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:35:14,740 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-13 02:35:14,741 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-11-13 02:35:14,745 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 10=[|v_#valid_14|]} [2021-11-13 02:35:14,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:35:14,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-13 02:35:14,753 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:35:14,753 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-13 02:35:14,754 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:35:14,755 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-13 02:35:14,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:35:14,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:35:14,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:35:14,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:35:14,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:35:14,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:35:14,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:35:14,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-13 02:35:14,792 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:35:14,794 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 02:35:14,795 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:35:14,795 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 02:35:14,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:35:14,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:35:14,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:35:14,811 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:35:14,812 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-11-13 02:35:14,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:35:14,813 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:74 [2021-11-13 02:35:14,820 INFO L180 QuantifierPusher]: treesize reduction 13, result has 85.7 percent of original size [2021-11-13 02:35:14,822 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-11-13 02:35:14,827 INFO L180 QuantifierPusher]: treesize reduction 7, result has 93.5 percent of original size [2021-11-13 02:35:14,831 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-11-13 02:35:14,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:35:14,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:35:14,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:35:14,870 INFO L180 QuantifierPusher]: treesize reduction 4, result has 98.3 percent of original size [2021-11-13 02:35:14,876 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:35:14,917 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:35:14,921 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-11-13 02:35:14,925 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 206 [2021-11-13 02:35:14,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:35:14,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:35:14,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:35:14,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:35:14,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:35:14,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:35:14,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:35:14,969 INFO L180 QuantifierPusher]: treesize reduction 24, result has 69.2 percent of original size [2021-11-13 02:35:14,972 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-13 02:35:14,977 INFO L180 QuantifierPusher]: treesize reduction 24, result has 65.2 percent of original size [2021-11-13 02:35:14,979 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:35:14,979 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:35:14,981 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:35:14,982 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-13 02:35:14,988 INFO L180 QuantifierPusher]: treesize reduction 24, result has 69.2 percent of original size [2021-11-13 02:35:14,992 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-13 02:35:14,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:35:14,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:35:15,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:35:15,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:35:15,018 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 02:35:16,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 02:35:16,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:35:16,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 194 [2021-11-13 02:35:16,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25443618] [2021-11-13 02:35:16,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:35:16,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 195 states [2021-11-13 02:35:16,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:35:16,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2021-11-13 02:35:16,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18935, Invalid=21667, Unknown=0, NotChecked=0, Total=40602 [2021-11-13 02:35:16,031 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) [2021-11-13 02:35:42,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:42,111 INFO L93 Difference]: Finished difference Result 5666 states and 5952 transitions. [2021-11-13 02:35:42,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 288 states. [2021-11-13 02:35:42,112 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 [2021-11-13 02:35:42,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:42,142 INFO L225 Difference]: With dead ends: 5666 [2021-11-13 02:35:42,142 INFO L226 Difference]: Without dead ends: 5472 [2021-11-13 02:35:42,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 485 SyntacticMatches, 1 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12273 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=28535, Invalid=59971, Unknown=0, NotChecked=0, Total=88506 [2021-11-13 02:35:42,154 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 2830 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 1463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1322.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2830 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 2351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.64ms SdHoareTripleChecker+Time, 1463 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1738.72ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:42,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2830 Valid, 403 Invalid, 2351 Unknown, 0 Unchecked, 30.64ms Time], IncrementalHoareTripleChecker [1463 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 1738.72ms Time] [2021-11-13 02:35:42,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5472 states. [2021-11-13 02:35:42,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5472 to 675. [2021-11-13 02:35:42,209 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) [2021-11-13 02:35:42,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 771 transitions. [2021-11-13 02:35:42,211 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 771 transitions. Word has length 197 [2021-11-13 02:35:42,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:42,213 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 771 transitions. [2021-11-13 02:35:42,214 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) [2021-11-13 02:35:42,214 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 771 transitions. [2021-11-13 02:35:42,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-11-13 02:35:42,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:42,228 INFO L514 BasicCegarLoop]: trace histogram [191, 190, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:35:42,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-13 02:35:42,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:35:42,439 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:42,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:42,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1812557736, now seen corresponding path program 7 times [2021-11-13 02:35:42,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:35:42,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146167148] [2021-11-13 02:35:42,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:42,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:35:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 36290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:35:57,107 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:35:57,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146167148] [2021-11-13 02:35:57,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146167148] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:35:57,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735708196] [2021-11-13 02:35:57,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 02:35:57,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:35:57,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:35:57,109 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:35:57,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 02:35:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:57,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 1564 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-13 02:35:57,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:36:26,240 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 36290 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:36:26,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:36:38,010 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 36290 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:36:38,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735708196] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:36:38,011 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:36:38,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [193, 193] imperfect sequences [193] total 475 [2021-11-13 02:36:38,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499859549] [2021-11-13 02:36:38,013 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:36:38,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 283 states [2021-11-13 02:36:38,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:36:38,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 283 interpolants. [2021-11-13 02:36:38,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58432, Invalid=166718, Unknown=0, NotChecked=0, Total=225150 [2021-11-13 02:36:38,048 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) [2021-11-13 02:36:47,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:47,266 INFO L93 Difference]: Finished difference Result 27955 states and 28141 transitions. [2021-11-13 02:36:47,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-11-13 02:36:47,267 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 [2021-11-13 02:36:47,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:47,274 INFO L225 Difference]: With dead ends: 27955 [2021-11-13 02:36:47,275 INFO L226 Difference]: Without dead ends: 1198 [2021-11-13 02:36:47,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 969 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 473 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87780 ImplicationChecksByTransitivity, 51.9s TimeCoverageRelationStatistics Valid=58432, Invalid=166718, Unknown=0, NotChecked=0, Total=225150 [2021-11-13 02:36:47,322 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 769 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 404.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.68ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 516.00ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:47,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 1154 Invalid, 1036 Unknown, 0 Unchecked, 13.68ms Time], IncrementalHoareTripleChecker [5 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 516.00ms Time] [2021-11-13 02:36:47,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2021-11-13 02:36:47,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1182. [2021-11-13 02:36:47,356 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) [2021-11-13 02:36:47,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1190 transitions. [2021-11-13 02:36:47,360 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1190 transitions. Word has length 389 [2021-11-13 02:36:47,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:47,360 INFO L470 AbstractCegarLoop]: Abstraction has 1182 states and 1190 transitions. [2021-11-13 02:36:47,361 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) [2021-11-13 02:36:47,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1190 transitions. [2021-11-13 02:36:47,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-11-13 02:36:47,371 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:47,371 INFO L514 BasicCegarLoop]: trace histogram [100, 99, 92, 91, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:36:47,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:36:47,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:36:47,587 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:36:47,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:47,587 INFO L85 PathProgramCache]: Analyzing trace with hash 502894182, now seen corresponding path program 1 times [2021-11-13 02:36:47,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:36:47,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997693052] [2021-11-13 02:36:47,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:47,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:36:47,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:03,559 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:37:03,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997693052] [2021-11-13 02:37:03,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997693052] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:37:03,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740454231] [2021-11-13 02:37:03,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:03,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:37:03,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:37:03,563 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:37:03,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 02:37:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:03,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 1382 conjuncts, 194 conjunts are in the unsatisfiable core [2021-11-13 02:37:03,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:05,144 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:05,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:07,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740454231] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:37:07,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1066982996] [2021-11-13 02:37:07,989 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-13 02:37:07,989 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:37:07,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 02:37:07,990 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 02:37:07,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 02:37:07,997 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:37:07,998 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:37:07,998 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:37:07,999 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-13 02:37:08,000 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:37:08,021 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:37:08,022 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-13 02:37:08,023 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-11-13 02:37:08,026 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_14|], 10=[|v_#valid_15|]} [2021-11-13 02:37:08,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:08,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-13 02:37:08,035 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:37:08,036 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-13 02:37:08,036 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:37:08,037 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-13 02:37:08,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:37:08,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:37:08,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:37:08,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:08,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:08,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:08,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:08,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-13 02:37:08,054 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:37:08,056 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 02:37:08,057 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:37:08,058 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 02:37:08,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:37:08,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:37:08,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:37:08,063 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:37:08,064 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-11-13 02:37:08,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:37:08,065 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:74 [2021-11-13 02:37:08,068 INFO L180 QuantifierPusher]: treesize reduction 3, result has 96.8 percent of original size [2021-11-13 02:37:08,071 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-11-13 02:37:08,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:37:08,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:37:08,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:37:08,102 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:37:08,108 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 193 [2021-11-13 02:37:08,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:37:08,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:37:08,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:37:08,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:37:08,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:37:08,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:37:08,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:37:08,146 INFO L180 QuantifierPusher]: treesize reduction 24, result has 65.7 percent of original size [2021-11-13 02:37:08,149 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-13 02:37:08,155 INFO L180 QuantifierPusher]: treesize reduction 24, result has 63.6 percent of original size [2021-11-13 02:37:08,159 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:37:08,159 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:37:08,162 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:37:08,162 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-13 02:37:08,167 INFO L180 QuantifierPusher]: treesize reduction 4, result has 93.1 percent of original size [2021-11-13 02:37:08,170 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-13 02:37:08,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:37:08,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:37:08,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:37:08,191 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:37:08,195 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:37:08,196 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:37:08,199 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-13 02:37:08,201 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-13 02:37:08,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:37:08,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:37:08,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:37:08,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:37:08,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:37:08,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:37:08,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:37:08,230 INFO L180 QuantifierPusher]: treesize reduction 24, result has 69.2 percent of original size [2021-11-13 02:37:08,233 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-13 02:37:08,238 INFO L180 QuantifierPusher]: treesize reduction 24, result has 65.2 percent of original size [2021-11-13 02:37:08,240 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:37:08,241 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:37:08,243 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:37:08,243 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-13 02:37:08,249 INFO L180 QuantifierPusher]: treesize reduction 24, result has 69.2 percent of original size [2021-11-13 02:37:08,252 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-13 02:37:08,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:37:08,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:37:08,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:37:08,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:37:08,274 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 02:37:09,579 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 02:37:09,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:37:09,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 204 [2021-11-13 02:37:09,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137571448] [2021-11-13 02:37:09,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:37:09,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 205 states [2021-11-13 02:37:09,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:37:09,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 205 interpolants. [2021-11-13 02:37:09,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20533, Invalid=24199, Unknown=0, NotChecked=0, Total=44732 [2021-11-13 02:37:09,589 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) [2021-11-13 02:37:22,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:22,480 INFO L93 Difference]: Finished difference Result 2333 states and 2468 transitions. [2021-11-13 02:37:22,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2021-11-13 02:37:22,481 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 [2021-11-13 02:37:22,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:22,482 INFO L225 Difference]: With dead ends: 2333 [2021-11-13 02:37:22,482 INFO L226 Difference]: Without dead ends: 0 [2021-11-13 02:37:22,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1367 GetRequests, 1146 SyntacticMatches, 2 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2575 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=20659, Invalid=27961, Unknown=0, NotChecked=0, Total=48620 [2021-11-13 02:37:22,488 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 1851 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 1471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 869.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1851 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.79ms SdHoareTripleChecker+Time, 1471 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1154.91ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:22,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1851 Valid, 320 Invalid, 1963 Unknown, 0 Unchecked, 17.79ms Time], IncrementalHoareTripleChecker [1471 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 1154.91ms Time] [2021-11-13 02:37:22,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-13 02:37:22,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-13 02:37:22,490 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) [2021-11-13 02:37:22,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-13 02:37:22,491 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 389 [2021-11-13 02:37:22,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:22,491 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-13 02:37:22,492 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) [2021-11-13 02:37:22,492 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-13 02:37:22,493 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-13 02:37:22,496 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 02:37:22,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:22,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-11-13 02:37:22,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-13 02:37:22,720 INFO L858 garLoopResultBuilder]: For program point L35-2(lines 34 38) no Hoare annotation was computed. [2021-11-13 02:37:22,720 INFO L858 garLoopResultBuilder]: For program point L35-3(lines 24 42) no Hoare annotation was computed. [2021-11-13 02:37:22,720 INFO L858 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-11-13 02:37:22,721 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-13 02:37:22,721 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-11-13 02:37:22,721 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-13 02:37:22,721 INFO L858 garLoopResultBuilder]: For program point L29(lines 29 31) no Hoare annotation was computed. [2021-11-13 02:37:22,721 INFO L858 garLoopResultBuilder]: For program point L29-2(lines 28 31) no Hoare annotation was computed. [2021-11-13 02:37:22,721 INFO L858 garLoopResultBuilder]: For program point L29-3(lines 24 42) no Hoare annotation was computed. [2021-11-13 02:37:22,722 INFO L858 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-11-13 02:37:22,722 INFO L861 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-11-13 02:37:22,722 INFO L861 garLoopResultBuilder]: At program point L39(lines 24 42) the Hoare annotation is: true [2021-11-13 02:37:22,723 INFO L858 garLoopResultBuilder]: For program point L35(lines 35 38) no Hoare annotation was computed. [2021-11-13 02:37:22,727 INFO L732 BasicCegarLoop]: Path program histogram: [7, 1, 1, 1] [2021-11-13 02:37:22,729 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 02:37:22,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 02:37:22 BoogieIcfgContainer [2021-11-13 02:37:22,739 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-13 02:37:22,740 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 02:37:22,740 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 02:37:22,741 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 02:37:22,741 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:34:41" (3/4) ... [2021-11-13 02:37:22,745 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-13 02:37:22,757 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-11-13 02:37:22,758 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-13 02:37:22,758 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-13 02:37:22,758 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-13 02:37:22,794 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/witness.graphml [2021-11-13 02:37:22,794 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 02:37:22,795 INFO L158 Benchmark]: Toolchain (without parser) took 161918.28ms. Allocated memory was 123.7MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 94.9MB in the beginning and 1.5GB in the end (delta: -1.5GB). Peak memory consumption was 144.1MB. Max. memory is 16.1GB. [2021-11-13 02:37:22,795 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 123.7MB. Free memory is still 78.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:37:22,796 INFO L158 Benchmark]: CACSL2BoogieTranslator took 254.65ms. Allocated memory is still 123.7MB. Free memory was 94.7MB in the beginning and 97.2MB in the end (delta: -2.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 02:37:22,796 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.92ms. Allocated memory is still 123.7MB. Free memory was 97.2MB in the beginning and 95.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 02:37:22,796 INFO L158 Benchmark]: Boogie Preprocessor took 20.29ms. Allocated memory is still 123.7MB. Free memory was 95.7MB in the beginning and 94.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:37:22,797 INFO L158 Benchmark]: RCFGBuilder took 272.44ms. Allocated memory is still 123.7MB. Free memory was 94.7MB in the beginning and 85.1MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 02:37:22,797 INFO L158 Benchmark]: TraceAbstraction took 161266.75ms. Allocated memory was 123.7MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 84.7MB in the beginning and 1.5GB in the end (delta: -1.5GB). Peak memory consumption was 133.4MB. Max. memory is 16.1GB. [2021-11-13 02:37:22,798 INFO L158 Benchmark]: Witness Printer took 54.42ms. Allocated memory is still 1.7GB. Free memory was 1.5GB in the beginning and 1.5GB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 02:37:22,799 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 123.7MB. Free memory is still 78.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 254.65ms. Allocated memory is still 123.7MB. Free memory was 94.7MB in the beginning and 97.2MB in the end (delta: -2.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.92ms. Allocated memory is still 123.7MB. Free memory was 97.2MB in the beginning and 95.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.29ms. Allocated memory is still 123.7MB. Free memory was 95.7MB in the beginning and 94.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 272.44ms. Allocated memory is still 123.7MB. Free memory was 94.7MB in the beginning and 85.1MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 161266.75ms. Allocated memory was 123.7MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 84.7MB in the beginning and 1.5GB in the end (delta: -1.5GB). Peak memory consumption was 133.4MB. Max. memory is 16.1GB. * Witness Printer took 54.42ms. Allocated memory is still 1.7GB. Free memory was 1.5GB in the beginning and 1.5GB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. 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: 161.2s, OverallIterations: 10, TraceHistogramMax: 191, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.1s, AutomataDifference: 53.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7709 SdHoareTripleChecker+Valid, 4893.79ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7709 mSDsluCounter, 2334 SdHoareTripleChecker+Invalid, 3734.10ms 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, 93.21ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3938 GetRequests, 2620 SyntacticMatches, 8 SemanticMatches, 1310 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108597 ImplicationChecksByTransitivity, 99.9s 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, 1.7s SatisfiabilityAnalysisTime, 95.0s InterpolantComputationTime, 2388 NumberOfCodeBlocks, 2388 NumberOfCodeBlocksAsserted, 70 NumberOfCheckSat, 3548 ConstructedInterpolants, 0 QuantifiedInterpolants, 10935 SizeOfPredicates, 14 NumberOfNonLiveVariables, 4626 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! [2021-11-13 02:37:22,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea1bad3-2270-4665-a890-e1d5cd2de38a/bin/utaipan-vmNK8stdcF/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