./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr.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_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/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_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/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_6530d923-9017-4cde-a665-7deef29aba65/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 94a3c9718d8b0819c3a22a45f77fd4dac96406e3aa7eff964888695d6121efac --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:31:09,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:31:09,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:31:09,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:31:09,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:31:09,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:31:09,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:31:09,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:31:09,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:31:09,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:31:09,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:31:09,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:31:09,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:31:09,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:31:09,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:31:09,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:31:09,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:31:09,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:31:09,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:31:09,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:31:09,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:31:09,342 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:31:09,344 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:31:09,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:31:09,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:31:09,350 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:31:09,351 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:31:09,352 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:31:09,353 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:31:09,354 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:31:09,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:31:09,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:31:09,357 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:31:09,358 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:31:09,359 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:31:09,360 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:31:09,361 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:31:09,362 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:31:09,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:31:09,363 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:31:09,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:31:09,366 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 02:31:09,391 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:31:09,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:31:09,392 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:31:09,393 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:31:09,397 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:31:09,397 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:31:09,398 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:31:09,398 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:31:09,399 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:31:09,400 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:31:09,401 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:31:09,401 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:31:09,402 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:31:09,402 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:31:09,402 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:31:09,402 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:31:09,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:31:09,404 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:31:09,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:31:09,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:31:09,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:31:09,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:31:09,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:31:09,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:31:09,406 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:31:09,406 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:31:09,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:31:09,406 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:31:09,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:31:09,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:31:09,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:31:09,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:31:09,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:31:09,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:31:09,410 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:31:09,410 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:31:09,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:31:09,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:31:09,411 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:31:09,411 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:31:09,411 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_6530d923-9017-4cde-a665-7deef29aba65/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94a3c9718d8b0819c3a22a45f77fd4dac96406e3aa7eff964888695d6121efac [2021-11-13 02:31:09,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:31:09,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:31:09,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:31:09,690 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:31:09,691 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:31:09,692 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c [2021-11-13 02:31:09,794 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/data/533867fd3/ad3cbbf48e1e4ae28ebb1684ca7c9d79/FLAGb172c5953 [2021-11-13 02:31:10,242 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:31:10,243 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c [2021-11-13 02:31:10,254 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/data/533867fd3/ad3cbbf48e1e4ae28ebb1684ca7c9d79/FLAGb172c5953 [2021-11-13 02:31:10,622 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/data/533867fd3/ad3cbbf48e1e4ae28ebb1684ca7c9d79 [2021-11-13 02:31:10,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:31:10,626 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:31:10,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:31:10,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:31:10,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:31:10,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:31:10" (1/1) ... [2021-11-13 02:31:10,632 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@108c42eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:10, skipping insertion in model container [2021-11-13 02:31:10,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:31:10" (1/1) ... [2021-11-13 02:31:10,640 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:31:10,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:31:10,820 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_6530d923-9017-4cde-a665-7deef29aba65/sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c[414,427] [2021-11-13 02:31:10,838 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:31:10,858 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:31:10,871 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_6530d923-9017-4cde-a665-7deef29aba65/sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c[414,427] [2021-11-13 02:31:10,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:31:10,891 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:31:10,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:10 WrapperNode [2021-11-13 02:31:10,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:31:10,893 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:31:10,893 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:31:10,894 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:31:10,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:10" (1/1) ... [2021-11-13 02:31:10,908 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:10" (1/1) ... [2021-11-13 02:31:10,928 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:31:10,928 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:31:10,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:31:10,929 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:31:10,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:10" (1/1) ... [2021-11-13 02:31:10,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:10" (1/1) ... [2021-11-13 02:31:10,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:10" (1/1) ... [2021-11-13 02:31:10,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:10" (1/1) ... [2021-11-13 02:31:10,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:10" (1/1) ... [2021-11-13 02:31:10,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:10" (1/1) ... [2021-11-13 02:31:10,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:10" (1/1) ... [2021-11-13 02:31:10,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:31:10,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:31:10,952 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:31:10,952 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:31:10,953 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:10" (1/1) ... [2021-11-13 02:31:10,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:31:10,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:31:11,002 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:31:11,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:31:11,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 02:31:11,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:31:11,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 02:31:11,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:31:11,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:31:11,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 02:31:11,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 02:31:11,393 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:31:11,393 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 02:31:11,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:31:11 BoogieIcfgContainer [2021-11-13 02:31:11,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:31:11,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:31:11,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:31:11,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:31:11,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:31:10" (1/3) ... [2021-11-13 02:31:11,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d79bab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:31:11, skipping insertion in model container [2021-11-13 02:31:11,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:10" (2/3) ... [2021-11-13 02:31:11,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d79bab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:31:11, skipping insertion in model container [2021-11-13 02:31:11,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:31:11" (3/3) ... [2021-11-13 02:31:11,404 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_pair_symmetr.c [2021-11-13 02:31:11,410 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:31:11,410 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:31:11,455 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:31:11,463 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 02:31:11,463 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:31:11,476 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:31:11,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-13 02:31:11,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:31:11,482 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-13 02:31:11,482 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:31:11,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:31:11,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1387171958, now seen corresponding path program 1 times [2021-11-13 02:31:11,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:31:11,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115457051] [2021-11-13 02:31:11,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:11,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:31:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:31:11,753 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:31:11,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115457051] [2021-11-13 02:31:11,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115457051] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:31:11,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:31:11,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 02:31:11,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947913566] [2021-11-13 02:31:11,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:31:11,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:31:11,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:31:11,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:31:11,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:31:11,801 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 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 02:31:11,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:31:11,840 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2021-11-13 02:31:11,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:31:11,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 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) Word has length 6 [2021-11-13 02:31:11,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:31:11,850 INFO L225 Difference]: With dead ends: 17 [2021-11-13 02:31:11,851 INFO L226 Difference]: Without dead ends: 9 [2021-11-13 02:31:11,853 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 02:31:11,857 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.56ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.53ms IncrementalHoareTripleChecker+Time [2021-11-13 02:31:11,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 14 Unknown, 0 Unchecked, 0.56ms Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 22.53ms Time] [2021-11-13 02:31:11,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-13 02:31:11,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-13 02:31:11,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:31:11,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2021-11-13 02:31:11,890 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2021-11-13 02:31:11,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:31:11,890 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-11-13 02:31:11,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 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 02:31:11,891 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2021-11-13 02:31:11,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-13 02:31:11,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:31:11,892 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:31:11,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 02:31:11,892 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:31:11,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:31:11,893 INFO L85 PathProgramCache]: Analyzing trace with hash -110753083, now seen corresponding path program 1 times [2021-11-13 02:31:11,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:31:11,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121619463] [2021-11-13 02:31:11,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:11,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:31:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 02:31:11,964 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:31:11,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121619463] [2021-11-13 02:31:11,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121619463] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:31:11,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:31:11,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:31:11,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807454951] [2021-11-13 02:31:11,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:31:11,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:31:11,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:31:11,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:31:11,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:31:11,968 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:31:11,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:31:11,993 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2021-11-13 02:31:11,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:31:11,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-13 02:31:11,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:31:11,994 INFO L225 Difference]: With dead ends: 15 [2021-11-13 02:31:11,994 INFO L226 Difference]: Without dead ends: 10 [2021-11-13 02:31:11,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:31:11,996 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.46ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.59ms IncrementalHoareTripleChecker+Time [2021-11-13 02:31:11,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 6 Invalid, 14 Unknown, 0 Unchecked, 0.46ms Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 18.59ms Time] [2021-11-13 02:31:11,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-13 02:31:12,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-13 02:31:12,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:31:12,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-11-13 02:31:12,001 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-11-13 02:31:12,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:31:12,002 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-11-13 02:31:12,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:31:12,002 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-11-13 02:31:12,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-13 02:31:12,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:31:12,003 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:31:12,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 02:31:12,004 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:31:12,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:31:12,005 INFO L85 PathProgramCache]: Analyzing trace with hash 849702428, now seen corresponding path program 1 times [2021-11-13 02:31:12,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:31:12,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731760788] [2021-11-13 02:31:12,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:12,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:31:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 02:31:12,086 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:31:12,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731760788] [2021-11-13 02:31:12,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731760788] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:31:12,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986029578] [2021-11-13 02:31:12,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:12,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:31:12,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:31:12,090 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:31:12,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 02:31:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:12,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:31:12,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 02:31:12,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 02:31:12,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986029578] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:31:12,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [689230185] [2021-11-13 02:31:12,391 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-13 02:31:12,391 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:31:12,397 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 02:31:12,404 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 02:31:12,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 02:31:12,443 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:12,452 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:12,452 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:12,453 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-11-13 02:31:12,457 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:12,459 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:12,460 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-11-13 02:31:12,466 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 239 [2021-11-13 02:31:12,501 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_15|], 78=[|v_#valid_32|]} [2021-11-13 02:31:12,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 27 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-13 02:31:12,576 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:12,577 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-13 02:31:12,578 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:12,579 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-13 02:31:12,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:12,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:12,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:12,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,799 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-13 02:31:12,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 19 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 67 treesize of output 66 [2021-11-13 02:31:12,802 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:12,807 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-13 02:31:12,811 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:12,813 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-13 02:31:12,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:12,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:12,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:12,845 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:12,851 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-11-13 02:31:12,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:31:12,852 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:236, output treesize:175 [2021-11-13 02:31:12,866 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:12,872 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:12,873 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:12,874 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-13 02:31:12,888 INFO L185 QuantifierPusher]: treesize reduction 3, result has 98.8 percent of original size 248 [2021-11-13 02:31:12,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:12,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 38 [2021-11-13 02:31:12,966 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:12,969 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-13 02:31:12,970 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:12,970 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-13 02:31:12,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:12,986 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:12,987 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:12,988 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:12,988 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:12,989 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:12,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:13,002 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:13,003 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:13,003 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:13,004 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:13,010 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:13,010 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:13,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:13,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:13,060 INFO L180 QuantifierPusher]: treesize reduction 10, result has 95.4 percent of original size [2021-11-13 02:31:13,067 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 209 [2021-11-13 02:31:13,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:31:13,072 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:691, output treesize:209 [2021-11-13 02:31:13,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:13,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:13,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:13,309 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:13,339 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:13,349 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:13,365 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 384 [2021-11-13 02:31:13,376 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:13,386 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:13,394 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:13,398 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:13,399 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-11-13 02:31:13,402 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:13,403 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:13,407 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 89 [2021-11-13 02:31:13,426 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 474 [2021-11-13 02:31:13,428 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:13,444 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:13,463 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 428 [2021-11-13 02:31:13,487 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 556 [2021-11-13 02:31:13,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:13,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:13,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:13,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:13,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:13,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 75 [2021-11-13 02:31:13,606 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:13,609 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-13 02:31:13,610 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:13,612 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-13 02:31:13,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:13,655 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:13,656 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:13,657 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:13,657 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:13,658 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:13,658 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:13,685 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:13,687 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:13,688 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:13,688 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:13,689 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:13,689 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:13,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:13,717 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:13,722 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:13,722 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:13,723 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:13,723 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:13,745 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:13,746 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:13,747 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:13,748 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:13,749 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:13,749 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:13,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:13,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:13,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:13,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2021-11-13 02:31:13,792 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:13,798 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-13 02:31:13,799 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:13,799 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-13 02:31:13,800 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:13,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:13,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:13,925 INFO L180 QuantifierPusher]: treesize reduction 138, result has 78.8 percent of original size [2021-11-13 02:31:13,936 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 514 [2021-11-13 02:31:13,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-13 02:31:13,938 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:2050, output treesize:514 [2021-11-13 02:31:13,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:14,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:14,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:14,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:14,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:14,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:14,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:14,143 INFO L180 QuantifierPusher]: treesize reduction 54, result has 73.1 percent of original size [2021-11-13 02:31:14,145 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:14,146 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:14,147 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-13 02:31:14,150 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 144 [2021-11-13 02:31:14,163 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:14,164 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:14,164 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:14,165 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:14,166 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:14,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:14,174 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:14,175 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:14,177 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:14,185 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:14,186 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:14,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:14,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:31:14,210 INFO L354 Elim1Store]: treesize reduction 19, result has 45.7 percent of original size [2021-11-13 02:31:14,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2021-11-13 02:31:14,214 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:14,215 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-13 02:31:14,216 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:14,217 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-13 02:31:14,217 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:14,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:14,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:14,226 INFO L180 QuantifierPusher]: treesize reduction 7, result has 93.8 percent of original size [2021-11-13 02:31:14,228 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-13 02:31:14,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:31:14,230 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:373, output treesize:105 [2021-11-13 02:31:14,237 INFO L180 QuantifierPusher]: treesize reduction 55, result has 51.8 percent of original size [2021-11-13 02:31:14,241 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-13 02:31:14,244 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:14,248 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:14,248 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:14,249 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 02:31:14,251 INFO L185 QuantifierPusher]: treesize reduction 3, result has 96.1 percent of original size 74 [2021-11-13 02:31:14,297 INFO L354 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2021-11-13 02:31:14,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2021-11-13 02:31:14,299 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:14,309 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:14,314 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:14,325 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-11-13 02:31:14,327 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-11-13 02:31:14,328 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:14,330 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-11-13 02:31:14,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-11-13 02:31:14,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:14,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:14,342 INFO L180 QuantifierPusher]: treesize reduction 5, result has 96.5 percent of original size [2021-11-13 02:31:14,344 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 136 [2021-11-13 02:31:14,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:31:14,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:136 [2021-11-13 02:31:14,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:14,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:14,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:14,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:14,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:14,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:14,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:14,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:14,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:14,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:14,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:14,400 INFO L180 QuantifierPusher]: treesize reduction 54, result has 63.5 percent of original size [2021-11-13 02:31:14,404 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:14,405 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:14,406 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-13 02:31:14,407 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-13 02:31:14,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:31:14,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:31:14,456 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-13 02:31:14,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-13 02:31:14,457 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:14,464 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:14,465 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:14,473 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-13 02:31:14,475 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-13 02:31:14,476 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:14,478 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-13 02:31:14,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-11-13 02:31:14,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:14,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:14,489 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:14,491 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 188 [2021-11-13 02:31:14,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:31:14,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:93, output treesize:188 [2021-11-13 02:31:14,500 INFO L180 QuantifierPusher]: treesize reduction 55, result has 51.8 percent of original size [2021-11-13 02:31:14,503 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-13 02:31:14,508 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 02:31:14,902 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 02:31:14,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:31:14,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2021-11-13 02:31:14,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628765876] [2021-11-13 02:31:14,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:31:14,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:31:14,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:31:14,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:31:14,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:31:14,904 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:31:14,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:31:14,935 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2021-11-13 02:31:14,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:31:14,936 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-13 02:31:14,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:31:14,937 INFO L225 Difference]: With dead ends: 20 [2021-11-13 02:31:14,937 INFO L226 Difference]: Without dead ends: 13 [2021-11-13 02:31:14,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:31:14,938 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.50ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.65ms IncrementalHoareTripleChecker+Time [2021-11-13 02:31:14,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 22 Unknown, 0 Unchecked, 0.50ms Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 25.65ms Time] [2021-11-13 02:31:14,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-13 02:31:14,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-13 02:31:14,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 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 02:31:14,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-13 02:31:14,943 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2021-11-13 02:31:14,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:31:14,943 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-13 02:31:14,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:31:14,943 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-13 02:31:14,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 02:31:14,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:31:14,944 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:31:14,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:31:15,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:31:15,145 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:31:15,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:31:15,146 INFO L85 PathProgramCache]: Analyzing trace with hash 193659703, now seen corresponding path program 2 times [2021-11-13 02:31:15,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:31:15,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721815843] [2021-11-13 02:31:15,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:15,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:31:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:15,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 02:31:15,228 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:31:15,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721815843] [2021-11-13 02:31:15,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721815843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:31:15,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54222573] [2021-11-13 02:31:15,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:31:15,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:31:15,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:31:15,229 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:31:15,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 02:31:15,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-13 02:31:15,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:31:15,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:31:15,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 02:31:15,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 02:31:15,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54222573] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:31:15,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1891920389] [2021-11-13 02:31:15,415 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-13 02:31:15,415 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:31:15,415 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 02:31:15,415 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 02:31:15,416 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 02:31:15,422 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,423 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:15,426 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,426 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-11-13 02:31:15,427 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:15,428 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,428 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-11-13 02:31:15,431 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 239 [2021-11-13 02:31:15,435 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_16|], 78=[|v_#valid_33|]} [2021-11-13 02:31:15,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 27 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-13 02:31:15,486 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,486 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-13 02:31:15,487 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,488 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-13 02:31:15,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:15,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:15,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,583 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-13 02:31:15,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 19 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 67 treesize of output 66 [2021-11-13 02:31:15,585 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,590 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-13 02:31:15,591 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,591 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-13 02:31:15,592 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:15,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:15,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,605 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,608 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-11-13 02:31:15,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:31:15,609 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:236, output treesize:175 [2021-11-13 02:31:15,615 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,618 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:15,619 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,620 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-13 02:31:15,627 INFO L185 QuantifierPusher]: treesize reduction 3, result has 98.8 percent of original size 248 [2021-11-13 02:31:15,643 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:15,644 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,644 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:15,645 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,645 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:15,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:15,670 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:15,670 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,671 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:15,671 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,671 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:15,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:15,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:15,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 38 [2021-11-13 02:31:15,688 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,690 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-13 02:31:15,691 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,691 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-13 02:31:15,692 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:15,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:15,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,711 INFO L180 QuantifierPusher]: treesize reduction 10, result has 95.4 percent of original size [2021-11-13 02:31:15,714 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 209 [2021-11-13 02:31:15,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:31:15,716 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:691, output treesize:209 [2021-11-13 02:31:15,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:15,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:15,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:15,839 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,849 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:15,857 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,865 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 384 [2021-11-13 02:31:15,872 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:15,878 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,880 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:15,881 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,881 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 89 [2021-11-13 02:31:15,883 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:15,883 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,884 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-11-13 02:31:15,891 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 474 [2021-11-13 02:31:15,892 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:15,898 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,904 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 428 [2021-11-13 02:31:15,914 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 556 [2021-11-13 02:31:15,945 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:15,945 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,946 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:15,946 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,947 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:15,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:15,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:15,971 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,971 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:15,972 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:15,975 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:15,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:16,000 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:16,001 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,001 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:16,002 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,002 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:16,003 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:16,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:16,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:16,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:16,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:16,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:16,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 75 [2021-11-13 02:31:16,059 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,063 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-13 02:31:16,064 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,064 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-13 02:31:16,065 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:16,085 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:16,086 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,086 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:16,087 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,087 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:16,087 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:16,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:16,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:16,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:16,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2021-11-13 02:31:16,122 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,125 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-13 02:31:16,126 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,127 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-13 02:31:16,127 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:16,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:16,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,231 INFO L180 QuantifierPusher]: treesize reduction 138, result has 78.8 percent of original size [2021-11-13 02:31:16,240 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 514 [2021-11-13 02:31:16,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-13 02:31:16,243 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:2050, output treesize:514 [2021-11-13 02:31:16,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:16,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:16,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:16,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:16,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:16,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:16,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:16,381 INFO L180 QuantifierPusher]: treesize reduction 54, result has 73.1 percent of original size [2021-11-13 02:31:16,384 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:16,389 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,389 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-13 02:31:16,391 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 144 [2021-11-13 02:31:16,401 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:16,402 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,402 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:16,403 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,403 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:16,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:16,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:31:16,429 INFO L354 Elim1Store]: treesize reduction 19, result has 45.7 percent of original size [2021-11-13 02:31:16,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2021-11-13 02:31:16,430 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,431 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-13 02:31:16,431 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,433 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-13 02:31:16,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:16,440 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:16,441 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,441 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:16,442 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,442 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:16,442 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:16,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:16,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,450 INFO L180 QuantifierPusher]: treesize reduction 7, result has 93.8 percent of original size [2021-11-13 02:31:16,452 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-13 02:31:16,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:31:16,453 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:373, output treesize:105 [2021-11-13 02:31:16,459 INFO L180 QuantifierPusher]: treesize reduction 55, result has 51.8 percent of original size [2021-11-13 02:31:16,462 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-13 02:31:16,466 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,468 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:16,468 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,469 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 02:31:16,471 INFO L185 QuantifierPusher]: treesize reduction 3, result has 96.1 percent of original size 74 [2021-11-13 02:31:16,513 INFO L354 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2021-11-13 02:31:16,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2021-11-13 02:31:16,515 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,521 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:16,522 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,530 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:16,531 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,534 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-13 02:31:16,535 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-11-13 02:31:16,538 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-11-13 02:31:16,539 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,540 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-11-13 02:31:16,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-11-13 02:31:16,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:16,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,549 INFO L180 QuantifierPusher]: treesize reduction 10, result has 92.9 percent of original size [2021-11-13 02:31:16,551 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-13 02:31:16,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:31:16,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:131 [2021-11-13 02:31:16,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:16,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:16,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:16,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:16,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:16,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:16,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:16,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:16,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:16,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:16,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:16,597 INFO L180 QuantifierPusher]: treesize reduction 54, result has 63.5 percent of original size [2021-11-13 02:31:16,599 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:16,600 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,600 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-13 02:31:16,601 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-13 02:31:16,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:31:16,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:31:16,653 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-13 02:31:16,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-13 02:31:16,654 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,657 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:16,658 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,664 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-13 02:31:16,665 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-13 02:31:16,667 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,668 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-13 02:31:16,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-11-13 02:31:16,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:16,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,676 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:16,678 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 188 [2021-11-13 02:31:16,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:31:16,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:93, output treesize:188 [2021-11-13 02:31:16,686 INFO L180 QuantifierPusher]: treesize reduction 55, result has 51.8 percent of original size [2021-11-13 02:31:16,689 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-13 02:31:16,694 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 02:31:17,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 02:31:17,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:31:17,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2021-11-13 02:31:17,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238349027] [2021-11-13 02:31:17,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:31:17,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:31:17,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:31:17,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:31:17,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-11-13 02:31:17,056 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:31:17,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:31:17,218 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2021-11-13 02:31:17,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 02:31:17,219 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-13 02:31:17,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:31:17,220 INFO L225 Difference]: With dead ends: 55 [2021-11-13 02:31:17,220 INFO L226 Difference]: Without dead ends: 48 [2021-11-13 02:31:17,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-11-13 02:31:17,221 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 92 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.60ms SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.41ms IncrementalHoareTripleChecker+Time [2021-11-13 02:31:17,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 24 Invalid, 104 Unknown, 0 Unchecked, 2.60ms Time], IncrementalHoareTripleChecker [66 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 88.41ms Time] [2021-11-13 02:31:17,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-13 02:31:17,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 22. [2021-11-13 02:31:17,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:31:17,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-11-13 02:31:17,228 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 11 [2021-11-13 02:31:17,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:31:17,229 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-11-13 02:31:17,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:31:17,229 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-11-13 02:31:17,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-13 02:31:17,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:31:17,230 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2021-11-13 02:31:17,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:31:17,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-13 02:31:17,450 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:31:17,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:31:17,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1909590116, now seen corresponding path program 3 times [2021-11-13 02:31:17,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:31:17,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201172057] [2021-11-13 02:31:17,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:17,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:31:17,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-13 02:31:17,600 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:31:17,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201172057] [2021-11-13 02:31:17,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201172057] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:31:17,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263478069] [2021-11-13 02:31:17,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:31:17,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:31:17,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:31:17,602 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:31:17,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 02:31:17,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 02:31:17,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:31:17,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 02:31:17,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-13 02:31:17,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:18,085 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-13 02:31:18,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263478069] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:31:18,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [236688886] [2021-11-13 02:31:18,088 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-13 02:31:18,088 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:31:18,088 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 02:31:18,088 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 02:31:18,088 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 02:31:18,094 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,095 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:18,095 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,096 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-11-13 02:31:18,097 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:18,097 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,098 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-11-13 02:31:18,101 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 239 [2021-11-13 02:31:18,104 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_17|], 78=[|v_#valid_34|]} [2021-11-13 02:31:18,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 27 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-13 02:31:18,152 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,152 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-13 02:31:18,153 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,154 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-13 02:31:18,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:18,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:18,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,245 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-13 02:31:18,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 19 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 67 treesize of output 66 [2021-11-13 02:31:18,246 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,250 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-13 02:31:18,251 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,252 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-13 02:31:18,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:18,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:18,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,264 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,268 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-11-13 02:31:18,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:31:18,269 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:236, output treesize:175 [2021-11-13 02:31:18,277 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,279 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:18,280 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,281 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-13 02:31:18,287 INFO L185 QuantifierPusher]: treesize reduction 3, result has 98.8 percent of original size 248 [2021-11-13 02:31:18,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 38 [2021-11-13 02:31:18,321 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,325 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-13 02:31:18,326 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,327 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-13 02:31:18,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:18,340 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:18,341 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,341 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:18,341 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,342 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:18,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:18,352 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:18,352 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,353 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:18,353 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,354 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:18,354 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:18,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:18,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,371 INFO L180 QuantifierPusher]: treesize reduction 10, result has 95.4 percent of original size [2021-11-13 02:31:18,375 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 209 [2021-11-13 02:31:18,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:31:18,376 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:691, output treesize:209 [2021-11-13 02:31:18,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:18,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:18,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:18,487 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,514 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:18,521 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,528 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 384 [2021-11-13 02:31:18,536 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:18,542 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,543 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:18,544 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,545 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 89 [2021-11-13 02:31:18,546 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:18,546 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,547 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-11-13 02:31:18,554 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 474 [2021-11-13 02:31:18,554 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:18,560 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,566 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 428 [2021-11-13 02:31:18,575 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 556 [2021-11-13 02:31:18,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2021-11-13 02:31:18,620 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,622 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-13 02:31:18,623 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,624 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-13 02:31:18,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:18,641 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:18,641 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,642 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:18,642 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,643 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:18,643 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:18,659 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:18,659 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,660 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:18,660 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,661 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:18,661 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:18,679 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:18,679 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,680 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:18,680 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,680 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:18,681 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:18,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:18,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 75 [2021-11-13 02:31:18,730 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,733 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-13 02:31:18,734 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,734 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-13 02:31:18,735 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:18,751 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:18,752 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,752 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:18,753 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,753 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:18,753 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:18,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:18,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:18,856 INFO L180 QuantifierPusher]: treesize reduction 138, result has 78.8 percent of original size [2021-11-13 02:31:18,869 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 514 [2021-11-13 02:31:18,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-13 02:31:18,871 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:2050, output treesize:514 [2021-11-13 02:31:18,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:18,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:18,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:18,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:18,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:18,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:19,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:19,013 INFO L180 QuantifierPusher]: treesize reduction 54, result has 73.1 percent of original size [2021-11-13 02:31:19,015 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:19,016 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:19,017 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-13 02:31:19,019 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 144 [2021-11-13 02:31:19,029 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:19,029 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:19,030 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:19,030 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:19,030 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:19,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:19,037 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:19,037 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:19,038 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:19,038 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:19,039 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:19,039 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:19,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:31:19,059 INFO L354 Elim1Store]: treesize reduction 19, result has 45.7 percent of original size [2021-11-13 02:31:19,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2021-11-13 02:31:19,060 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:19,061 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-13 02:31:19,061 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:19,062 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-13 02:31:19,062 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:19,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:19,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:19,070 INFO L180 QuantifierPusher]: treesize reduction 7, result has 93.8 percent of original size [2021-11-13 02:31:19,072 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-13 02:31:19,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:31:19,073 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:373, output treesize:105 [2021-11-13 02:31:19,079 INFO L180 QuantifierPusher]: treesize reduction 55, result has 51.8 percent of original size [2021-11-13 02:31:19,082 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-13 02:31:19,084 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:19,092 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:19,093 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:19,093 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 02:31:19,095 INFO L185 QuantifierPusher]: treesize reduction 3, result has 96.1 percent of original size 74 [2021-11-13 02:31:19,138 INFO L354 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2021-11-13 02:31:19,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2021-11-13 02:31:19,139 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:19,142 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:19,143 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:19,145 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:19,146 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:19,148 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-13 02:31:19,149 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-11-13 02:31:19,150 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-11-13 02:31:19,152 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:19,153 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-11-13 02:31:19,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-11-13 02:31:19,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:19,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:19,162 INFO L180 QuantifierPusher]: treesize reduction 10, result has 92.9 percent of original size [2021-11-13 02:31:19,164 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-13 02:31:19,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:31:19,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:131 [2021-11-13 02:31:19,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:19,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:19,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:19,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:19,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:19,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:19,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:19,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:19,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:19,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:19,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:19,207 INFO L180 QuantifierPusher]: treesize reduction 54, result has 63.5 percent of original size [2021-11-13 02:31:19,212 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:19,213 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:19,213 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-13 02:31:19,214 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-13 02:31:19,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:31:19,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:31:19,260 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-13 02:31:19,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-13 02:31:19,262 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:19,264 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:19,265 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:19,270 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-13 02:31:19,271 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-13 02:31:19,273 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:19,274 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-13 02:31:19,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-11-13 02:31:19,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:19,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:19,282 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:19,284 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 188 [2021-11-13 02:31:19,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:31:19,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:93, output treesize:188 [2021-11-13 02:31:19,291 INFO L180 QuantifierPusher]: treesize reduction 55, result has 51.8 percent of original size [2021-11-13 02:31:19,293 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-13 02:31:19,298 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 02:31:19,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 02:31:19,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:31:19,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2021-11-13 02:31:19,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772262545] [2021-11-13 02:31:19,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:31:19,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-13 02:31:19,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:31:19,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-13 02:31:19,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=586, Unknown=0, NotChecked=0, Total=992 [2021-11-13 02:31:19,648 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:31:20,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:31:20,041 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2021-11-13 02:31:20,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 02:31:20,042 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-13 02:31:20,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:31:20,046 INFO L225 Difference]: With dead ends: 124 [2021-11-13 02:31:20,046 INFO L226 Difference]: Without dead ends: 111 [2021-11-13 02:31:20,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2021-11-13 02:31:20,049 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 252 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 146.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.64ms SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 193.77ms IncrementalHoareTripleChecker+Time [2021-11-13 02:31:20,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 57 Invalid, 249 Unknown, 0 Unchecked, 3.64ms Time], IncrementalHoareTripleChecker [166 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 193.77ms Time] [2021-11-13 02:31:20,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-13 02:31:20,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 40. [2021-11-13 02:31:20,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:31:20,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-11-13 02:31:20,065 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 20 [2021-11-13 02:31:20,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:31:20,065 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-11-13 02:31:20,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:31:20,067 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-11-13 02:31:20,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-13 02:31:20,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:31:20,069 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2021-11-13 02:31:20,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:31:20,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:31:20,286 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:31:20,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:31:20,286 INFO L85 PathProgramCache]: Analyzing trace with hash 726013834, now seen corresponding path program 4 times [2021-11-13 02:31:20,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:31:20,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511564121] [2021-11-13 02:31:20,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:20,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:31:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-13 02:31:20,598 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:31:20,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511564121] [2021-11-13 02:31:20,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511564121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:31:20,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949089359] [2021-11-13 02:31:20,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 02:31:20,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:31:20,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:31:20,600 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:31:20,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 02:31:20,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:20,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 02:31:20,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-13 02:31:21,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-13 02:31:21,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949089359] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:31:21,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2032216757] [2021-11-13 02:31:21,598 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-13 02:31:21,598 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:31:21,598 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 02:31:21,599 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 02:31:21,599 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 02:31:21,604 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:21,605 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:21,606 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:21,606 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-11-13 02:31:21,607 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:21,607 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:21,607 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-11-13 02:31:21,609 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 239 [2021-11-13 02:31:21,613 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_18|], 78=[|v_#valid_35|]} [2021-11-13 02:31:21,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 27 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-13 02:31:21,660 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:21,661 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-13 02:31:21,661 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:21,662 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-13 02:31:21,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:21,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:21,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:21,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,745 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-13 02:31:21,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 19 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 67 treesize of output 66 [2021-11-13 02:31:21,746 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:21,750 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-13 02:31:21,751 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:21,751 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-13 02:31:21,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:21,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:21,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:21,761 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:21,764 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-11-13 02:31:21,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:31:21,765 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:236, output treesize:175 [2021-11-13 02:31:21,771 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:21,773 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:21,774 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:21,774 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-11-13 02:31:21,779 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 270 [2021-11-13 02:31:21,808 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:21,809 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:21,809 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:21,810 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:21,810 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:21,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:21,819 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:21,820 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:21,820 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:21,820 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:21,821 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:21,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:21,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:21,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2021-11-13 02:31:21,836 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:21,839 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-13 02:31:21,839 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:21,840 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-13 02:31:21,840 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:21,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:21,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:21,854 INFO L180 QuantifierPusher]: treesize reduction 9, result has 96.1 percent of original size [2021-11-13 02:31:21,858 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 224 [2021-11-13 02:31:21,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:31:21,859 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:748, output treesize:224 [2021-11-13 02:31:21,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:21,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:21,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:21,937 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:21,947 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:21,953 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:21,960 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 409 [2021-11-13 02:31:21,966 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:21,973 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:21,974 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:21,975 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:21,975 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-11-13 02:31:21,977 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:21,977 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:21,978 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 109 [2021-11-13 02:31:21,984 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 499 [2021-11-13 02:31:21,984 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:21,990 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:21,996 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 453 [2021-11-13 02:31:22,003 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 581 [2021-11-13 02:31:22,039 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:22,040 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,040 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:22,040 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,041 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:22,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:22,056 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:22,057 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,057 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:22,058 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,058 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:22,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:22,073 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:22,074 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,074 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:22,075 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,075 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:22,075 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:22,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:22,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:22,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:22,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2021-11-13 02:31:22,108 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,110 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-13 02:31:22,110 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,111 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-13 02:31:22,111 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:22,126 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:22,126 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,127 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:22,127 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,128 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:22,128 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:22,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:22,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:22,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:22,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:22,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:22,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 85 [2021-11-13 02:31:22,165 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,167 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-11-13 02:31:22,168 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,168 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-11-13 02:31:22,169 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:22,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:22,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,253 INFO L180 QuantifierPusher]: treesize reduction 143, result has 78.9 percent of original size [2021-11-13 02:31:22,287 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 534 [2021-11-13 02:31:22,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-13 02:31:22,289 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:2125, output treesize:534 [2021-11-13 02:31:22,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:22,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:22,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:22,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:22,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:22,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:22,364 INFO L180 QuantifierPusher]: treesize reduction 54, result has 73.1 percent of original size [2021-11-13 02:31:22,366 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:22,366 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,366 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-13 02:31:22,368 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 144 [2021-11-13 02:31:22,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:22,379 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,379 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:22,379 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,380 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:22,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:22,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:31:22,402 INFO L354 Elim1Store]: treesize reduction 19, result has 45.7 percent of original size [2021-11-13 02:31:22,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2021-11-13 02:31:22,403 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,403 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-13 02:31:22,404 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,404 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-13 02:31:22,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:22,410 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:22,412 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,413 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:22,413 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,413 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:22,414 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:22,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:22,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,419 INFO L180 QuantifierPusher]: treesize reduction 7, result has 93.8 percent of original size [2021-11-13 02:31:22,421 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-13 02:31:22,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:31:22,422 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:373, output treesize:105 [2021-11-13 02:31:22,428 INFO L180 QuantifierPusher]: treesize reduction 55, result has 51.8 percent of original size [2021-11-13 02:31:22,430 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-13 02:31:22,432 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,434 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:22,434 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,435 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-13 02:31:22,436 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 96 [2021-11-13 02:31:22,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:31:22,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:31:22,475 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-13 02:31:22,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-13 02:31:22,476 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,478 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:22,479 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,482 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:22,482 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,486 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-13 02:31:22,487 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-13 02:31:22,488 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-13 02:31:22,489 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,490 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-13 02:31:22,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-11-13 02:31:22,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:22,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,496 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,498 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 190 [2021-11-13 02:31:22,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:31:22,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:95, output treesize:190 [2021-11-13 02:31:22,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:22,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:22,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:22,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:22,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:22,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:22,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:22,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:22,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:22,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:22,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:22,532 INFO L180 QuantifierPusher]: treesize reduction 54, result has 63.5 percent of original size [2021-11-13 02:31:22,533 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:22,534 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,534 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-13 02:31:22,535 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-13 02:31:22,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:31:22,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:31:22,572 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-13 02:31:22,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-13 02:31:22,573 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,575 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:22,576 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,578 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:22,580 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,582 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-13 02:31:22,583 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-13 02:31:22,584 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-13 02:31:22,585 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,586 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-13 02:31:22,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-11-13 02:31:22,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:22,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,592 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:22,594 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 188 [2021-11-13 02:31:22,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:31:22,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:93, output treesize:188 [2021-11-13 02:31:22,600 INFO L180 QuantifierPusher]: treesize reduction 55, result has 51.8 percent of original size [2021-11-13 02:31:22,602 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-13 02:31:22,606 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 02:31:22,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 02:31:22,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:31:22,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2021-11-13 02:31:22,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782207952] [2021-11-13 02:31:22,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:31:23,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-13 02:31:23,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:31:23,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-13 02:31:23,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1403, Invalid=1789, Unknown=0, NotChecked=0, Total=3192 [2021-11-13 02:31:23,004 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:31:23,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:31:23,102 INFO L93 Difference]: Finished difference Result 80 states and 101 transitions. [2021-11-13 02:31:23,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-13 02:31:23,102 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 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 38 [2021-11-13 02:31:23,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:31:23,106 INFO L225 Difference]: With dead ends: 80 [2021-11-13 02:31:23,106 INFO L226 Difference]: Without dead ends: 58 [2021-11-13 02:31:23,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1403, Invalid=1789, Unknown=0, NotChecked=0, Total=3192 [2021-11-13 02:31:23,110 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.78ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.12ms IncrementalHoareTripleChecker+Time [2021-11-13 02:31:23,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 100 Unknown, 0 Unchecked, 0.78ms Time], IncrementalHoareTripleChecker [23 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 68.12ms Time] [2021-11-13 02:31:23,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-13 02:31:23,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-13 02:31:23,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:31:23,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-11-13 02:31:23,126 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 38 [2021-11-13 02:31:23,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:31:23,126 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-11-13 02:31:23,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:31:23,127 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-11-13 02:31:23,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-13 02:31:23,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:31:23,131 INFO L514 BasicCegarLoop]: trace histogram [34, 16, 1, 1, 1, 1, 1, 1] [2021-11-13 02:31:23,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:31:23,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-11-13 02:31:23,350 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:31:23,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:31:23,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1878074902, now seen corresponding path program 5 times [2021-11-13 02:31:23,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:31:23,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325272070] [2021-11-13 02:31:23,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:23,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:31:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-13 02:31:24,162 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:31:24,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325272070] [2021-11-13 02:31:24,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325272070] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:31:24,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598613709] [2021-11-13 02:31:24,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:31:24,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:31:24,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:31:24,164 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:31:24,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 02:31:30,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-13 02:31:30,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:31:30,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 02:31:30,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-11-13 02:31:31,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:32,138 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-11-13 02:31:32,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598613709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:31:32,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1434261785] [2021-11-13 02:31:32,140 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-13 02:31:32,141 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:31:32,141 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 02:31:32,141 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 02:31:32,141 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 02:31:32,146 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,161 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:32,162 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,162 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-11-13 02:31:32,163 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:32,164 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,164 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-11-13 02:31:32,167 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 239 [2021-11-13 02:31:32,170 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_19|], 78=[|v_#valid_36|]} [2021-11-13 02:31:32,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 27 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-13 02:31:32,216 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,217 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-13 02:31:32,219 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,220 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-13 02:31:32,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:32,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:32,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,312 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-13 02:31:32,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 19 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 67 treesize of output 66 [2021-11-13 02:31:32,313 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,317 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-13 02:31:32,318 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,319 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-13 02:31:32,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:32,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:32,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,332 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,334 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-11-13 02:31:32,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:31:32,335 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:236, output treesize:175 [2021-11-13 02:31:32,342 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,345 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:32,346 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,346 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-13 02:31:32,352 INFO L185 QuantifierPusher]: treesize reduction 3, result has 98.8 percent of original size 248 [2021-11-13 02:31:32,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 38 [2021-11-13 02:31:32,389 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,390 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-13 02:31:32,391 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,391 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-13 02:31:32,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:32,403 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:32,403 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,404 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:32,404 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,404 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:32,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:32,414 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:32,415 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,415 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:32,416 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,417 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:32,417 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:32,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:32,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,433 INFO L180 QuantifierPusher]: treesize reduction 10, result has 95.4 percent of original size [2021-11-13 02:31:32,437 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 209 [2021-11-13 02:31:32,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:31:32,438 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:691, output treesize:209 [2021-11-13 02:31:32,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:32,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:32,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:32,531 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,545 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:32,552 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,558 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 384 [2021-11-13 02:31:32,564 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:32,569 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,570 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:32,571 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,571 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 89 [2021-11-13 02:31:32,572 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:32,573 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,573 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-11-13 02:31:32,578 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 474 [2021-11-13 02:31:32,579 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:32,584 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,588 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 428 [2021-11-13 02:31:32,595 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 556 [2021-11-13 02:31:32,619 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:32,619 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,619 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:32,620 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,620 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:32,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:32,634 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:32,635 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,635 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:32,635 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,636 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:32,636 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:32,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 75 [2021-11-13 02:31:32,679 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,680 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-13 02:31:32,681 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,682 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-13 02:31:32,682 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:32,697 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:32,697 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,698 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:32,698 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,698 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:32,698 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:32,712 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:32,712 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,713 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:32,713 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,713 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:32,714 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:32,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:31:32,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2021-11-13 02:31:32,737 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,738 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-13 02:31:32,739 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,739 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-13 02:31:32,740 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:32,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:32,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,827 INFO L180 QuantifierPusher]: treesize reduction 138, result has 78.8 percent of original size [2021-11-13 02:31:32,834 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 514 [2021-11-13 02:31:32,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-13 02:31:32,836 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:2050, output treesize:514 [2021-11-13 02:31:32,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:32,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:32,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:32,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:32,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:32,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:32,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:32,915 INFO L180 QuantifierPusher]: treesize reduction 54, result has 73.1 percent of original size [2021-11-13 02:31:32,916 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:32,919 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,919 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-13 02:31:32,921 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 144 [2021-11-13 02:31:32,929 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:32,930 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,930 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:32,931 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,931 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:32,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:32,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:31:32,953 INFO L354 Elim1Store]: treesize reduction 19, result has 45.7 percent of original size [2021-11-13 02:31:32,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2021-11-13 02:31:32,953 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,954 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-13 02:31:32,954 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,955 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-13 02:31:32,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:32,961 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 02:31:32,961 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,962 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:32,962 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,963 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:31:32,963 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-13 02:31:32,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:32,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,969 INFO L180 QuantifierPusher]: treesize reduction 7, result has 93.8 percent of original size [2021-11-13 02:31:32,970 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-13 02:31:32,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:31:32,971 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:373, output treesize:105 [2021-11-13 02:31:32,977 INFO L180 QuantifierPusher]: treesize reduction 55, result has 51.8 percent of original size [2021-11-13 02:31:32,979 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-13 02:31:32,980 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,982 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:32,982 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:32,982 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 02:31:32,984 INFO L185 QuantifierPusher]: treesize reduction 3, result has 96.1 percent of original size 74 [2021-11-13 02:31:33,020 INFO L354 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2021-11-13 02:31:33,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2021-11-13 02:31:33,021 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:33,023 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:33,024 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:33,027 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-11-13 02:31:33,028 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-11-13 02:31:33,029 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:33,030 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-11-13 02:31:33,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-11-13 02:31:33,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:33,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:33,036 INFO L180 QuantifierPusher]: treesize reduction 5, result has 96.5 percent of original size [2021-11-13 02:31:33,037 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 136 [2021-11-13 02:31:33,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:31:33,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:136 [2021-11-13 02:31:33,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:33,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:33,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:33,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:33,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:33,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:33,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:33,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:33,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:33,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:33,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:33,069 INFO L180 QuantifierPusher]: treesize reduction 54, result has 63.5 percent of original size [2021-11-13 02:31:33,070 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:33,071 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:33,071 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-13 02:31:33,072 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-13 02:31:33,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:31:33,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:31:33,111 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-13 02:31:33,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-13 02:31:33,112 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:33,118 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:31:33,119 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:33,123 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-13 02:31:33,124 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-13 02:31:33,125 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:33,128 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-13 02:31:33,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-11-13 02:31:33,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:31:33,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:33,133 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:33,135 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 188 [2021-11-13 02:31:33,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:31:33,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:93, output treesize:188 [2021-11-13 02:31:33,141 INFO L180 QuantifierPusher]: treesize reduction 55, result has 51.8 percent of original size [2021-11-13 02:31:33,143 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-13 02:31:33,146 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 02:31:33,445 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 02:31:33,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:31:33,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 19, 19] total 72 [2021-11-13 02:31:33,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652625374] [2021-11-13 02:31:33,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:31:33,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-13 02:31:33,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:31:33,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-13 02:31:33,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2611, Invalid=3241, Unknown=0, NotChecked=0, Total=5852 [2021-11-13 02:31:33,450 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:31:35,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:31:35,740 INFO L93 Difference]: Finished difference Result 385 states and 442 transitions. [2021-11-13 02:31:35,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-13 02:31:35,740 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-13 02:31:35,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:31:35,744 INFO L225 Difference]: With dead ends: 385 [2021-11-13 02:31:35,744 INFO L226 Difference]: Without dead ends: 363 [2021-11-13 02:31:35,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3897 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4676, Invalid=7756, Unknown=0, NotChecked=0, Total=12432 [2021-11-13 02:31:35,751 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 978 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 404.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.99ms SdHoareTripleChecker+Time, 566 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 510.95ms IncrementalHoareTripleChecker+Time [2021-11-13 02:31:35,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [978 Valid, 180 Invalid, 813 Unknown, 0 Unchecked, 14.99ms Time], IncrementalHoareTripleChecker [566 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 510.95ms Time] [2021-11-13 02:31:35,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-11-13 02:31:35,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 112. [2021-11-13 02:31:35,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.027027027027027) internal successors, (114), 111 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:31:35,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2021-11-13 02:31:35,790 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 56 [2021-11-13 02:31:35,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:31:35,791 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2021-11-13 02:31:35,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:31:35,791 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2021-11-13 02:31:35,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-13 02:31:35,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:31:35,797 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1] [2021-11-13 02:31:35,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:31:36,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-11-13 02:31:36,002 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:31:36,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:31:36,002 INFO L85 PathProgramCache]: Analyzing trace with hash -98618998, now seen corresponding path program 6 times [2021-11-13 02:31:36,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:31:36,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928708830] [2021-11-13 02:31:36,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:36,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:31:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2021-11-13 02:31:37,534 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:31:37,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928708830] [2021-11-13 02:31:37,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928708830] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:31:37,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958042088] [2021-11-13 02:31:37,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:31:37,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:31:37,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:31:37,537 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:31:37,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6530d923-9017-4cde-a665-7deef29aba65/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process