./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/functions_1-2.c --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_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/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_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/functions_1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/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_664bb188-c37c-4045-9764-c54c7ef4141b/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 3c699f32b26271d9b8672d2685c3f1aa3d3ad54df32baf7d1d77d9a96ddd2517 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:41:15,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:41:15,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:41:15,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:41:15,221 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:41:15,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:41:15,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:41:15,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:41:15,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:41:15,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:41:15,241 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:41:15,243 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:41:15,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:41:15,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:41:15,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:41:15,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:41:15,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:41:15,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:41:15,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:41:15,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:41:15,258 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:41:15,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:41:15,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:41:15,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:41:15,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:41:15,265 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:41:15,266 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:41:15,267 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:41:15,267 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:41:15,268 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:41:15,269 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:41:15,270 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:41:15,270 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:41:15,271 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:41:15,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:41:15,273 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:41:15,274 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:41:15,274 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:41:15,274 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:41:15,275 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:41:15,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:41:15,277 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 01:41:15,303 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:41:15,304 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:41:15,305 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:41:15,305 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:41:15,305 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:41:15,306 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:41:15,306 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:41:15,306 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:41:15,307 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:41:15,307 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:41:15,308 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:41:15,308 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:41:15,308 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:41:15,309 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:41:15,309 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:41:15,310 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:41:15,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:41:15,311 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:41:15,311 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:41:15,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:41:15,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:41:15,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:41:15,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:41:15,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:41:15,313 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:41:15,313 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:41:15,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:41:15,313 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:41:15,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:41:15,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:41:15,314 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:41:15,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:41:15,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:41:15,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:41:15,315 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:41:15,315 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:41:15,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:41:15,316 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:41:15,316 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:41:15,316 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:41:15,316 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_664bb188-c37c-4045-9764-c54c7ef4141b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c699f32b26271d9b8672d2685c3f1aa3d3ad54df32baf7d1d77d9a96ddd2517 [2021-11-13 01:41:15,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:41:15,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:41:15,587 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:41:15,588 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:41:15,589 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:41:15,590 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/loop-acceleration/functions_1-2.c [2021-11-13 01:41:15,671 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/data/352dc53c4/141abcf1ab6a46939de9e3bae9f7b34e/FLAGcb9a6cc26 [2021-11-13 01:41:16,151 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:41:16,153 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/sv-benchmarks/c/loop-acceleration/functions_1-2.c [2021-11-13 01:41:16,164 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/data/352dc53c4/141abcf1ab6a46939de9e3bae9f7b34e/FLAGcb9a6cc26 [2021-11-13 01:41:16,534 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/data/352dc53c4/141abcf1ab6a46939de9e3bae9f7b34e [2021-11-13 01:41:16,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:41:16,539 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:41:16,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:41:16,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:41:16,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:41:16,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:41:16" (1/1) ... [2021-11-13 01:41:16,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34c569eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:16, skipping insertion in model container [2021-11-13 01:41:16,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:41:16" (1/1) ... [2021-11-13 01:41:16,556 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:41:16,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:41:16,774 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_664bb188-c37c-4045-9764-c54c7ef4141b/sv-benchmarks/c/loop-acceleration/functions_1-2.c[325,338] [2021-11-13 01:41:16,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:41:16,805 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:41:16,828 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_664bb188-c37c-4045-9764-c54c7ef4141b/sv-benchmarks/c/loop-acceleration/functions_1-2.c[325,338] [2021-11-13 01:41:16,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:41:16,855 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:41:16,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:16 WrapperNode [2021-11-13 01:41:16,856 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:41:16,857 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:41:16,858 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:41:16,858 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:41:16,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:16" (1/1) ... [2021-11-13 01:41:16,874 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:16" (1/1) ... [2021-11-13 01:41:16,896 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:41:16,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:41:16,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:41:16,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:41:16,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:16" (1/1) ... [2021-11-13 01:41:16,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:16" (1/1) ... [2021-11-13 01:41:16,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:16" (1/1) ... [2021-11-13 01:41:16,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:16" (1/1) ... [2021-11-13 01:41:16,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:16" (1/1) ... [2021-11-13 01:41:16,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:16" (1/1) ... [2021-11-13 01:41:16,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:16" (1/1) ... [2021-11-13 01:41:16,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:41:16,941 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:41:16,941 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:41:16,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:41:16,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:16" (1/1) ... [2021-11-13 01:41:16,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:41:16,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:41:16,974 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:41:17,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:41:17,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:41:17,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:41:17,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 01:41:17,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:41:17,255 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:41:17,255 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 01:41:17,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:41:17 BoogieIcfgContainer [2021-11-13 01:41:17,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:41:17,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:41:17,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:41:17,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:41:17,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:41:16" (1/3) ... [2021-11-13 01:41:17,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e54d078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:41:17, skipping insertion in model container [2021-11-13 01:41:17,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:16" (2/3) ... [2021-11-13 01:41:17,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e54d078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:41:17, skipping insertion in model container [2021-11-13 01:41:17,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:41:17" (3/3) ... [2021-11-13 01:41:17,266 INFO L111 eAbstractionObserver]: Analyzing ICFG functions_1-2.c [2021-11-13 01:41:17,271 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:41:17,271 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 01:41:17,316 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:41:17,324 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 01:41:17,324 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 01:41:17,337 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:41:17,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-13 01:41:17,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:17,342 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-13 01:41:17,343 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:17,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:17,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1972614, now seen corresponding path program 1 times [2021-11-13 01:41:17,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:41:17,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31483067] [2021-11-13 01:41:17,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:17,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:41:17,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:17,563 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 01:41:17,564 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:41:17,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31483067] [2021-11-13 01:41:17,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31483067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:41:17,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:41:17,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 01:41:17,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277975030] [2021-11-13 01:41:17,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:17,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:41:17,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:41:17,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:41:17,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:41:17,612 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 01:41:17,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:17,639 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-13 01:41:17,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:41:17,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-11-13 01:41:17,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:17,650 INFO L225 Difference]: With dead ends: 13 [2021-11-13 01:41:17,650 INFO L226 Difference]: Without dead ends: 6 [2021-11-13 01:41:17,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:41:17,657 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.40ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.89ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:17,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.40ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 12.89ms Time] [2021-11-13 01:41:17,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-13 01:41:17,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-13 01:41:17,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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 01:41:17,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-13 01:41:17,697 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-13 01:41:17,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:17,698 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-13 01:41:17,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 01:41:17,698 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-13 01:41:17,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-13 01:41:17,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:17,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-13 01:41:17,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 01:41:17,699 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:17,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:17,700 INFO L85 PathProgramCache]: Analyzing trace with hash 61048167, now seen corresponding path program 1 times [2021-11-13 01:41:17,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:41:17,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579280757] [2021-11-13 01:41:17,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:17,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:41:17,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:17,824 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:41:17,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579280757] [2021-11-13 01:41:17,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579280757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:17,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572708966] [2021-11-13 01:41:17,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:17,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:41:17,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:41:17,827 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:41:17,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 01:41:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:17,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 01:41:17,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:17,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:17,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572708966] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:41:17,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1291602274] [2021-11-13 01:41:18,013 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-13 01:41:18,013 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:41:18,018 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 01:41:18,023 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 01:41:18,024 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 01:41:18,053 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:18,060 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:18,060 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:18,061 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:41:18,065 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:18,067 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:18,068 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 01:41:18,071 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-13 01:41:18,093 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-11-13 01:41:18,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:18,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:18,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:18,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-13 01:41:18,120 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:18,121 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:41:18,122 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:18,122 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:41:18,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:41:18,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:18,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:18,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:18,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:18,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:18,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:18,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:18,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:18,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:18,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:18,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:18,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-13 01:41:18,179 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:18,183 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:41:18,184 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:18,185 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:41:18,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:41:18,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:18,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:18,206 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:18,209 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-13 01:41:18,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:41:18,210 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-11-13 01:41:18,218 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:18,232 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-11-13 01:41:18,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:18,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:18,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:18,429 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:18,461 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 251 [2021-11-13 01:41:18,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:18,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:18,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:18,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:18,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:18,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:18,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:18,591 INFO L180 QuantifierPusher]: treesize reduction 30, result has 63.0 percent of original size [2021-11-13 01:41:18,596 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-13 01:41:18,609 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 01:41:18,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 01:41:18,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:41:18,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-13 01:41:18,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860898493] [2021-11-13 01:41:18,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:41:18,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:41:18,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:41:18,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:41:18,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:41:18,944 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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 01:41:18,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:19,000 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-11-13 01:41:19,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:41:19,001 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-13 01:41:19,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:19,001 INFO L225 Difference]: With dead ends: 12 [2021-11-13 01:41:19,001 INFO L226 Difference]: Without dead ends: 9 [2021-11-13 01:41:19,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:41:19,007 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.62ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.78ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:19,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 17 Unknown, 0 Unchecked, 3.62ms Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 31.78ms Time] [2021-11-13 01:41:19,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-13 01:41:19,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-13 01:41:19,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 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 01:41:19,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-13 01:41:19,019 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-13 01:41:19,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:19,019 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-13 01:41:19,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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 01:41:19,020 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-13 01:41:19,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-13 01:41:19,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:19,021 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-13 01:41:19,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:19,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:41:19,249 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:19,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:19,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1812629958, now seen corresponding path program 2 times [2021-11-13 01:41:19,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:41:19,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867486775] [2021-11-13 01:41:19,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:19,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:41:19,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:19,411 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:19,411 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:41:19,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867486775] [2021-11-13 01:41:19,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867486775] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:19,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990441899] [2021-11-13 01:41:19,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 01:41:19,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:41:19,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:41:19,417 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:41:19,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 01:41:19,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 01:41:19,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:41:19,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-13 01:41:19,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:19,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:19,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990441899] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:41:19,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1467726235] [2021-11-13 01:41:19,706 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-13 01:41:19,707 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:41:19,708 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 01:41:19,708 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 01:41:19,708 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 01:41:19,716 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:19,718 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:19,721 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:19,722 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 01:41:19,723 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:19,723 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:19,725 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:41:19,728 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-13 01:41:19,737 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-11-13 01:41:19,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:19,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:19,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:19,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-13 01:41:19,757 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:19,760 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:41:19,762 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:19,762 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:41:19,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:41:19,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:19,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:19,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:19,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:19,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:19,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:19,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:19,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:19,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:19,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:19,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:19,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-13 01:41:19,797 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:19,800 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:41:19,800 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:19,802 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:41:19,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:41:19,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:19,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:19,809 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:19,810 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-13 01:41:19,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:41:19,811 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-11-13 01:41:19,814 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:19,817 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-13 01:41:19,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:19,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:19,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:19,870 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:19,885 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 253 [2021-11-13 01:41:19,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:19,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:19,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:19,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:19,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:19,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:19,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:19,973 INFO L180 QuantifierPusher]: treesize reduction 30, result has 63.0 percent of original size [2021-11-13 01:41:19,976 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-13 01:41:19,983 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 01:41:20,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 01:41:20,282 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:41:20,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-13 01:41:20,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019300277] [2021-11-13 01:41:20,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:41:20,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 01:41:20,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:41:20,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 01:41:20,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:41:20,284 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:41:20,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:20,696 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-11-13 01:41:20,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 01:41:20,696 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-13 01:41:20,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:20,697 INFO L225 Difference]: With dead ends: 18 [2021-11-13 01:41:20,697 INFO L226 Difference]: Without dead ends: 15 [2021-11-13 01:41:20,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-11-13 01:41:20,699 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.78ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.08ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:20,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 45 Unknown, 0 Unchecked, 0.78ms Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 53.08ms Time] [2021-11-13 01:41:20,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-13 01:41:20,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-13 01:41:20,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:41:20,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-13 01:41:20,704 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2021-11-13 01:41:20,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:20,704 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-13 01:41:20,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:41:20,704 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-13 01:41:20,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-13 01:41:20,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:20,705 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2021-11-13 01:41:20,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:20,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-13 01:41:20,917 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:20,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:20,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1371813414, now seen corresponding path program 3 times [2021-11-13 01:41:20,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:41:20,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213035021] [2021-11-13 01:41:20,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:20,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:41:20,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:21,191 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:41:21,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213035021] [2021-11-13 01:41:21,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213035021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:21,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183998750] [2021-11-13 01:41:21,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 01:41:21,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:41:21,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:41:21,193 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:41:21,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 01:41:21,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 01:41:21,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:41:21,254 WARN L261 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-13 01:41:21,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:21,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:21,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183998750] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:41:21,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [23239026] [2021-11-13 01:41:21,748 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-13 01:41:21,748 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:41:21,748 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 01:41:21,748 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 01:41:21,749 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 01:41:21,758 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:21,759 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:21,760 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:21,761 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:41:21,761 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:21,762 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:21,762 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 01:41:21,764 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-13 01:41:21,775 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 21=[|v_#valid_12|]} [2021-11-13 01:41:21,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:21,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:21,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:21,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-13 01:41:21,785 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:21,786 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:41:21,786 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:21,787 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:41:21,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:41:21,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:21,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:21,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:21,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:21,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:21,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:21,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:21,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:21,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:21,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:21,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:21,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-13 01:41:21,816 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:21,819 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:41:21,819 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:21,820 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:41:21,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:41:21,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:21,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:21,825 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:21,826 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-13 01:41:21,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:41:21,827 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-11-13 01:41:21,830 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:21,833 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-11-13 01:41:21,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:21,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:21,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:21,889 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:21,900 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 253 [2021-11-13 01:41:21,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:21,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:21,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:21,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:21,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:21,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:21,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:21,966 INFO L180 QuantifierPusher]: treesize reduction 30, result has 63.0 percent of original size [2021-11-13 01:41:21,968 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-13 01:41:21,974 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 01:41:22,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 01:41:22,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:41:22,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2021-11-13 01:41:22,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845988139] [2021-11-13 01:41:22,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:41:22,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-13 01:41:22,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:41:22,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-13 01:41:22,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2021-11-13 01:41:22,307 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 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 01:41:29,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:29,056 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2021-11-13 01:41:29,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-13 01:41:29,057 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 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 14 [2021-11-13 01:41:29,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:29,058 INFO L225 Difference]: With dead ends: 30 [2021-11-13 01:41:29,058 INFO L226 Difference]: Without dead ends: 27 [2021-11-13 01:41:29,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=449, Invalid=957, Unknown=0, NotChecked=0, Total=1406 [2021-11-13 01:41:29,061 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 112.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.97ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 142.17ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:29,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 184 Unknown, 0 Unchecked, 1.97ms Time], IncrementalHoareTripleChecker [31 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 142.17ms Time] [2021-11-13 01:41:29,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-13 01:41:29,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-13 01:41:29,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 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 01:41:29,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-11-13 01:41:29,071 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2021-11-13 01:41:29,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:29,071 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-11-13 01:41:29,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 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 01:41:29,072 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-11-13 01:41:29,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-13 01:41:29,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:29,073 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2021-11-13 01:41:29,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:29,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-13 01:41:29,288 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:29,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:29,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1620915942, now seen corresponding path program 4 times [2021-11-13 01:41:29,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:41:29,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149101167] [2021-11-13 01:41:29,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:29,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:41:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:29,973 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:41:29,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149101167] [2021-11-13 01:41:29,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149101167] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:29,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234137690] [2021-11-13 01:41:29,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 01:41:29,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:41:29,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:41:29,976 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:41:30,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 01:41:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:30,089 WARN L261 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 179 conjunts are in the unsatisfiable core [2021-11-13 01:41:30,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:30,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:31,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234137690] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:41:31,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [320380075] [2021-11-13 01:41:31,903 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-13 01:41:31,903 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:41:31,903 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 01:41:31,904 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 01:41:31,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 01:41:31,909 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:31,910 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:31,910 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:31,911 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:41:31,912 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:31,913 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:31,913 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 01:41:31,915 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-13 01:41:31,918 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_12|], 21=[|v_#valid_13|]} [2021-11-13 01:41:31,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:31,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:31,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:31,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-13 01:41:31,932 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:31,932 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:41:31,933 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:31,934 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:41:31,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:41:31,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:31,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:31,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:31,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:31,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:31,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:31,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:31,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:31,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:31,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:31,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:31,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-13 01:41:31,960 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:31,962 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:41:31,963 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:31,964 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:41:31,964 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:41:31,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:31,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:31,970 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:31,972 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-13 01:41:31,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:41:31,973 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-11-13 01:41:31,976 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:31,979 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-11-13 01:41:31,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:31,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:32,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:32,024 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:32,033 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 260 [2021-11-13 01:41:32,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:32,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:32,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:32,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:32,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:32,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:32,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:32,085 INFO L180 QuantifierPusher]: treesize reduction 30, result has 63.0 percent of original size [2021-11-13 01:41:32,087 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-13 01:41:32,094 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 01:41:32,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 01:41:32,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:41:32,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2021-11-13 01:41:32,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327632779] [2021-11-13 01:41:32,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:41:32,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-13 01:41:32,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:41:32,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-13 01:41:32,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=1973, Unknown=0, NotChecked=0, Total=2652 [2021-11-13 01:41:32,624 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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 01:42:06,154 WARN L227 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 86 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 01:44:32,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:44:32,912 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2021-11-13 01:44:32,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-13 01:44:32,913 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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 26 [2021-11-13 01:44:32,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:44:32,914 INFO L225 Difference]: With dead ends: 54 [2021-11-13 01:44:32,915 INFO L226 Difference]: Without dead ends: 51 [2021-11-13 01:44:32,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 182.1s TimeCoverageRelationStatistics Valid=1754, Invalid=3645, Unknown=3, NotChecked=0, Total=5402 [2021-11-13 01:44:32,919 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 366.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.90ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 429.99ms IncrementalHoareTripleChecker+Time [2021-11-13 01:44:32,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 607 Unknown, 0 Unchecked, 3.90ms Time], IncrementalHoareTripleChecker [25 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 429.99ms Time] [2021-11-13 01:44:32,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-13 01:44:32,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-13 01:44:32,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 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 01:44:32,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-11-13 01:44:32,932 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2021-11-13 01:44:32,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:44:32,932 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-11-13 01:44:32,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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 01:44:32,933 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-11-13 01:44:32,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-13 01:44:32,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:44:32,936 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2021-11-13 01:44:32,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-13 01:44:33,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:44:33,149 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:44:33,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:44:33,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1280170086, now seen corresponding path program 5 times [2021-11-13 01:44:33,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:44:33,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469009284] [2021-11-13 01:44:33,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:44:33,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:44:33,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:44:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:44:34,991 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:44:34,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469009284] [2021-11-13 01:44:34,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469009284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:44:34,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900097436] [2021-11-13 01:44:34,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 01:44:34,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:44:34,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:44:34,998 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:44:34,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_664bb188-c37c-4045-9764-c54c7ef4141b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 01:44:38,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-13 01:44:38,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:44:38,775 WARN L261 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 378 conjunts are in the unsatisfiable core [2021-11-13 01:44:38,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:44:39,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:44:39,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:45:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:45:14,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900097436] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:45:14,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1238917690] [2021-11-13 01:45:14,213 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-13 01:45:14,214 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:45:14,214 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 01:45:14,214 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 01:45:14,215 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 01:45:14,225 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:45:14,226 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:45:14,226 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:45:14,227 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:45:14,228 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:45:14,229 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:45:14,230 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 01:45:14,231 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-13 01:45:14,235 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 21=[|v_#valid_14|]} [2021-11-13 01:45:14,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:45:14,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:45:14,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:45:14,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-13 01:45:14,249 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:45:14,252 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:45:14,252 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:45:14,253 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:45:14,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:45:14,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:45:14,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:45:14,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:45:14,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:45:14,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:45:14,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:45:14,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:45:14,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:45:14,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:45:14,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:45:14,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:45:14,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-13 01:45:14,284 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:45:14,286 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:45:14,287 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:45:14,288 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:45:14,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:45:14,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:45:14,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:45:14,295 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:45:14,296 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-13 01:45:14,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:45:14,297 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-11-13 01:45:14,302 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:45:14,304 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-13 01:45:14,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:45:14,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:45:14,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:45:14,378 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:45:14,386 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 253 [2021-11-13 01:45:14,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:45:14,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:45:14,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:45:14,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:45:14,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:45:14,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:45:14,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:45:14,459 INFO L180 QuantifierPusher]: treesize reduction 30, result has 63.0 percent of original size [2021-11-13 01:45:14,461 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-13 01:45:14,469 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 01:45:17,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 01:45:17,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:45:17,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 49] total 97 [2021-11-13 01:45:17,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695247611] [2021-11-13 01:45:17,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:45:17,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-13 01:45:17,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:45:17,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-13 01:45:17,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2597, Invalid=7503, Unknown=0, NotChecked=0, Total=10100 [2021-11-13 01:45:17,044 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 98 states, 98 states have (on average 1.030612244897959) internal successors, (101), 97 states have internal predecessors, (101), 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 01:49:17,914 WARN L227 SmtUtils]: Spent 3.36m on a formula simplification. DAG size of input: 287 DAG size of output: 17 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 01:53:30,246 WARN L227 SmtUtils]: Spent 3.53m on a formula simplification. DAG size of input: 281 DAG size of output: 17 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)