./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/sendmail-close-angle.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/sendmail-close-angle.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw --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 4be4b344509b887bc91f2389f98de1e4ff745494aee0f078864fd49e79b0b4b8 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-20 06:27:46,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 06:27:46,537 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 06:27:46,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 06:27:46,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 06:27:46,574 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 06:27:46,576 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 06:27:46,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 06:27:46,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 06:27:46,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 06:27:46,585 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 06:27:46,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 06:27:46,587 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 06:27:46,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 06:27:46,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 06:27:46,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 06:27:46,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 06:27:46,596 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 06:27:46,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 06:27:46,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 06:27:46,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 06:27:46,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 06:27:46,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 06:27:46,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 06:27:46,614 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 06:27:46,615 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 06:27:46,616 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 06:27:46,617 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 06:27:46,618 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 06:27:46,619 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 06:27:46,620 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 06:27:46,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 06:27:46,622 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 06:27:46,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 06:27:46,625 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 06:27:46,626 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 06:27:46,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 06:27:46,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 06:27:46,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 06:27:46,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 06:27:46,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 06:27:46,632 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-20 06:27:46,661 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 06:27:46,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 06:27:46,662 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 06:27:46,663 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 06:27:46,663 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 06:27:46,663 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 06:27:46,664 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-20 06:27:46,664 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 06:27:46,664 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 06:27:46,665 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-20 06:27:46,665 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-20 06:27:46,665 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 06:27:46,666 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-20 06:27:46,666 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-20 06:27:46,666 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-20 06:27:46,667 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 06:27:46,668 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 06:27:46,668 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-20 06:27:46,668 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 06:27:46,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 06:27:46,669 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 06:27:46,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 06:27:46,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 06:27:46,670 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-20 06:27:46,670 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 06:27:46,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 06:27:46,670 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 06:27:46,671 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 06:27:46,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 06:27:46,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 06:27:46,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 06:27:46,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 06:27:46,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 06:27:46,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 06:27:46,673 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-20 06:27:46,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-20 06:27:46,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 06:27:46,674 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 06:27:46,674 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 06:27:46,674 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_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4be4b344509b887bc91f2389f98de1e4ff745494aee0f078864fd49e79b0b4b8 [2021-10-20 06:27:46,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 06:27:47,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 06:27:47,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 06:27:47,008 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 06:27:47,009 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 06:27:47,010 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/loop-invgen/sendmail-close-angle.i [2021-10-20 06:27:47,109 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/data/cffcac12f/677e0eace8b1413eaf28d659fd55bb99/FLAG6c05bfaaf [2021-10-20 06:27:47,648 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 06:27:47,649 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/sv-benchmarks/c/loop-invgen/sendmail-close-angle.i [2021-10-20 06:27:47,664 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/data/cffcac12f/677e0eace8b1413eaf28d659fd55bb99/FLAG6c05bfaaf [2021-10-20 06:27:48,000 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/data/cffcac12f/677e0eace8b1413eaf28d659fd55bb99 [2021-10-20 06:27:48,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 06:27:48,004 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 06:27:48,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 06:27:48,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 06:27:48,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 06:27:48,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:27:48" (1/1) ... [2021-10-20 06:27:48,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b95fc23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:27:48, skipping insertion in model container [2021-10-20 06:27:48,013 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:27:48" (1/1) ... [2021-10-20 06:27:48,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 06:27:48,041 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 06:27:48,244 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_66120f45-257a-4c7e-89f8-ccfc4dadca76/sv-benchmarks/c/loop-invgen/sendmail-close-angle.i[893,906] [2021-10-20 06:27:48,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 06:27:48,269 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 06:27:48,284 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_66120f45-257a-4c7e-89f8-ccfc4dadca76/sv-benchmarks/c/loop-invgen/sendmail-close-angle.i[893,906] [2021-10-20 06:27:48,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 06:27:48,303 INFO L208 MainTranslator]: Completed translation [2021-10-20 06:27:48,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:27:48 WrapperNode [2021-10-20 06:27:48,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 06:27:48,305 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 06:27:48,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 06:27:48,305 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 06:27:48,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:27:48" (1/1) ... [2021-10-20 06:27:48,321 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:27:48" (1/1) ... [2021-10-20 06:27:48,344 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 06:27:48,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-20 06:27:48,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-20 06:27:48,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-20 06:27:48,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:27:48" (1/1) ... [2021-10-20 06:27:48,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:27:48" (1/1) ... [2021-10-20 06:27:48,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:27:48" (1/1) ... [2021-10-20 06:27:48,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:27:48" (1/1) ... [2021-10-20 06:27:48,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:27:48" (1/1) ... [2021-10-20 06:27:48,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:27:48" (1/1) ... [2021-10-20 06:27:48,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:27:48" (1/1) ... [2021-10-20 06:27:48,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-20 06:27:48,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-20 06:27:48,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-20 06:27:48,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-20 06:27:48,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:27:48" (1/1) ... [2021-10-20 06:27:48,390 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 06:27:48,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:27:48,437 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-20 06:27:48,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-20 06:27:48,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-20 06:27:48,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-20 06:27:48,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-20 06:27:48,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-20 06:27:48,800 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-20 06:27:48,800 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-20 06:27:48,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:27:48 BoogieIcfgContainer [2021-10-20 06:27:48,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-20 06:27:48,806 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-20 06:27:48,807 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-20 06:27:48,811 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-20 06:27:48,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:27:48" (1/3) ... [2021-10-20 06:27:48,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a220e24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:27:48, skipping insertion in model container [2021-10-20 06:27:48,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:27:48" (2/3) ... [2021-10-20 06:27:48,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a220e24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:27:48, skipping insertion in model container [2021-10-20 06:27:48,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:27:48" (3/3) ... [2021-10-20 06:27:48,823 INFO L111 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i [2021-10-20 06:27:48,829 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-20 06:27:48,841 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-10-20 06:27:48,907 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-20 06:27:48,925 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-20 06:27:48,925 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-10-20 06:27:48,953 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 32 states have (on average 1.6875) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:27:48,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-20 06:27:48,960 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:27:48,961 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:27:48,962 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-10-20 06:27:48,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:27:48,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1231245506, now seen corresponding path program 1 times [2021-10-20 06:27:48,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:27:48,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215775510] [2021-10-20 06:27:48,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:27:48,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:27:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:27:49,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:27:49,136 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:27:49,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215775510] [2021-10-20 06:27:49,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215775510] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:27:49,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:27:49,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 06:27:49,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627518031] [2021-10-20 06:27:49,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-20 06:27:49,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:27:49,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-20 06:27:49,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-20 06:27:49,165 INFO L87 Difference]: Start difference. First operand has 41 states, 32 states have (on average 1.6875) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:27:49,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:27:49,189 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2021-10-20 06:27:49,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-20 06:27:49,191 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-20 06:27:49,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:27:49,214 INFO L225 Difference]: With dead ends: 78 [2021-10-20 06:27:49,214 INFO L226 Difference]: Without dead ends: 38 [2021-10-20 06:27:49,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-20 06:27:49,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-20 06:27:49,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-20 06:27:49,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.3) internal successors, (39), 37 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:27:49,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-10-20 06:27:49,256 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 8 [2021-10-20 06:27:49,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:27:49,257 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-10-20 06:27:49,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:27:49,257 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-10-20 06:27:49,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-20 06:27:49,258 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:27:49,258 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:27:49,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-20 06:27:49,259 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-10-20 06:27:49,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:27:49,261 INFO L82 PathProgramCache]: Analyzing trace with hash 431783130, now seen corresponding path program 1 times [2021-10-20 06:27:49,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:27:49,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653091] [2021-10-20 06:27:49,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:27:49,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:27:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:27:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:27:49,400 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:27:49,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653091] [2021-10-20 06:27:49,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653091] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:27:49,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:27:49,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-20 06:27:49,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132375113] [2021-10-20 06:27:49,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 06:27:49,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:27:49,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 06:27:49,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:27:49,405 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:27:49,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:27:49,524 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-10-20 06:27:49,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 06:27:49,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-20 06:27:49,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:27:49,528 INFO L225 Difference]: With dead ends: 42 [2021-10-20 06:27:49,531 INFO L226 Difference]: Without dead ends: 36 [2021-10-20 06:27:49,532 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 06:27:49,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-20 06:27:49,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2021-10-20 06:27:49,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:27:49,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-10-20 06:27:49,543 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 9 [2021-10-20 06:27:49,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:27:49,543 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-10-20 06:27:49,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:27:49,544 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-10-20 06:27:49,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-20 06:27:49,545 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:27:49,545 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:27:49,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-20 06:27:49,546 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-10-20 06:27:49,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:27:49,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1668081891, now seen corresponding path program 1 times [2021-10-20 06:27:49,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:27:49,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205925140] [2021-10-20 06:27:49,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:27:49,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:27:49,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:27:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:27:49,692 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:27:49,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205925140] [2021-10-20 06:27:49,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205925140] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:27:49,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:27:49,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-20 06:27:49,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141421175] [2021-10-20 06:27:49,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-20 06:27:49,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:27:49,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-20 06:27:49,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-20 06:27:49,695 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2021-10-20 06:27:49,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:27:49,801 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2021-10-20 06:27:49,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-20 06:27:49,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) Word has length 11 [2021-10-20 06:27:49,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:27:49,803 INFO L225 Difference]: With dead ends: 48 [2021-10-20 06:27:49,803 INFO L226 Difference]: Without dead ends: 44 [2021-10-20 06:27:49,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-20 06:27:49,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-20 06:27:49,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2021-10-20 06:27:49,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:27:49,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-10-20 06:27:49,813 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 11 [2021-10-20 06:27:49,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:27:49,813 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-10-20 06:27:49,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2021-10-20 06:27:49,814 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-10-20 06:27:49,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-20 06:27:49,814 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:27:49,815 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:27:49,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-20 06:27:49,815 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-10-20 06:27:49,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:27:49,816 INFO L82 PathProgramCache]: Analyzing trace with hash 494361339, now seen corresponding path program 1 times [2021-10-20 06:27:49,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:27:49,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253757678] [2021-10-20 06:27:49,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:27:49,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:27:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:27:49,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:27:49,885 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:27:49,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253757678] [2021-10-20 06:27:49,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253757678] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:27:49,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:27:49,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-20 06:27:49,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014571086] [2021-10-20 06:27:49,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 06:27:49,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:27:49,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 06:27:49,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:27:49,889 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:27:49,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:27:49,988 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-10-20 06:27:49,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-20 06:27:49,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-20 06:27:49,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:27:49,993 INFO L225 Difference]: With dead ends: 52 [2021-10-20 06:27:49,994 INFO L226 Difference]: Without dead ends: 50 [2021-10-20 06:27:49,995 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 06:27:49,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-20 06:27:50,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-10-20 06:27:50,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.205128205128205) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:27:50,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-10-20 06:27:50,014 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 13 [2021-10-20 06:27:50,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:27:50,014 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-10-20 06:27:50,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:27:50,015 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-10-20 06:27:50,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-20 06:27:50,016 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:27:50,016 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:27:50,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-20 06:27:50,017 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-10-20 06:27:50,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:27:50,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1775966595, now seen corresponding path program 1 times [2021-10-20 06:27:50,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:27:50,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826224485] [2021-10-20 06:27:50,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:27:50,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:27:50,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:27:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:27:50,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:27:50,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826224485] [2021-10-20 06:27:50,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826224485] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:27:50,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:27:50,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-20 06:27:50,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255090882] [2021-10-20 06:27:50,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-20 06:27:50,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:27:50,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-20 06:27:50,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-20 06:27:50,123 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2021-10-20 06:27:50,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:27:50,303 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2021-10-20 06:27:50,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-20 06:27:50,304 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) Word has length 15 [2021-10-20 06:27:50,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:27:50,306 INFO L225 Difference]: With dead ends: 70 [2021-10-20 06:27:50,307 INFO L226 Difference]: Without dead ends: 56 [2021-10-20 06:27:50,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-20 06:27:50,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-20 06:27:50,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-10-20 06:27:50,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:27:50,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-10-20 06:27:50,333 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 15 [2021-10-20 06:27:50,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:27:50,334 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-10-20 06:27:50,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2021-10-20 06:27:50,334 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-10-20 06:27:50,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-20 06:27:50,335 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:27:50,335 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:27:50,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-20 06:27:50,336 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-10-20 06:27:50,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:27:50,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1659965986, now seen corresponding path program 1 times [2021-10-20 06:27:50,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:27:50,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694578088] [2021-10-20 06:27:50,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:27:50,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:27:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:27:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:27:50,415 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:27:50,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694578088] [2021-10-20 06:27:50,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694578088] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:27:50,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:27:50,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-20 06:27:50,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491453290] [2021-10-20 06:27:50,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-20 06:27:50,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:27:50,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-20 06:27:50,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-20 06:27:50,418 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2021-10-20 06:27:50,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:27:50,566 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2021-10-20 06:27:50,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-20 06:27:50,567 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) Word has length 15 [2021-10-20 06:27:50,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:27:50,570 INFO L225 Difference]: With dead ends: 61 [2021-10-20 06:27:50,570 INFO L226 Difference]: Without dead ends: 59 [2021-10-20 06:27:50,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-10-20 06:27:50,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-20 06:27:50,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2021-10-20 06:27:50,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:27:50,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-10-20 06:27:50,605 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 15 [2021-10-20 06:27:50,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:27:50,606 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-10-20 06:27:50,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2021-10-20 06:27:50,607 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-10-20 06:27:50,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-20 06:27:50,609 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:27:50,610 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:27:50,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-20 06:27:50,611 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-10-20 06:27:50,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:27:50,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1079570878, now seen corresponding path program 1 times [2021-10-20 06:27:50,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:27:50,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196317406] [2021-10-20 06:27:50,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:27:50,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:27:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:27:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:27:50,737 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:27:50,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196317406] [2021-10-20 06:27:50,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196317406] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-20 06:27:50,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872460605] [2021-10-20 06:27:50,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:27:50,738 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:27:50,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:27:50,740 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 06:27:50,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-20 06:27:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:27:50,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-20 06:27:50,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:27:51,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:27:51,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:27:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:27:51,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872460605] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:27:51,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2122352388] [2021-10-20 06:27:51,266 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-10-20 06:27:51,266 INFO L166 IcfgInterpreter]: Building call graph [2021-10-20 06:27:51,276 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-20 06:27:51,284 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-20 06:27:51,285 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-20 06:27:51,352 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:51,358 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:27:51,359 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:51,361 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-20 06:27:51,367 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:27:51,368 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:51,370 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-20 06:27:51,375 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-10-20 06:27:51,404 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_8|], 10=[|v_#valid_9|]} [2021-10-20 06:27:51,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:27:51,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-20 06:27:51,433 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:51,434 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-20 06:27:51,435 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:51,436 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-20 06:27:51,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-20 06:27:51,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:51,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:51,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:27:51,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:27:51,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:27:51,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:27:51,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-20 06:27:51,517 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:51,520 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-20 06:27:51,524 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:51,525 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-20 06:27:51,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-20 06:27:51,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:51,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:51,540 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:51,545 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-10-20 06:27:51,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-20 06:27:51,547 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:102, output treesize:87 [2021-10-20 06:27:51,565 INFO L180 QuantifierPusher]: treesize reduction 10, result has 91.7 percent of original size [2021-10-20 06:27:51,575 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-10-20 06:27:51,593 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:51,616 INFO L185 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size 120 [2021-10-20 06:27:51,635 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.1 percent of original size [2021-10-20 06:27:51,650 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-10-20 06:27:51,660 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:51,682 INFO L185 QuantifierPusher]: treesize reduction 7, result has 94.8 percent of original size 127 [2021-10-20 06:27:51,699 INFO L180 QuantifierPusher]: treesize reduction 7, result has 95.4 percent of original size [2021-10-20 06:27:51,710 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-10-20 06:27:51,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:51,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:51,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:51,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:51,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:51,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:51,831 INFO L180 QuantifierPusher]: treesize reduction 24, result has 79.8 percent of original size [2021-10-20 06:27:51,843 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-20 06:27:51,851 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:51,864 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-10-20 06:27:51,870 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:51,885 INFO L185 QuantifierPusher]: treesize reduction 3, result has 96.3 percent of original size 78 [2021-10-20 06:27:51,894 INFO L180 QuantifierPusher]: treesize reduction 3, result has 96.9 percent of original size [2021-10-20 06:27:51,900 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-20 06:27:51,915 INFO L180 QuantifierPusher]: treesize reduction 24, result has 79.8 percent of original size [2021-10-20 06:27:51,922 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-20 06:27:51,931 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:51,944 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-10-20 06:27:51,951 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:51,961 INFO L185 QuantifierPusher]: treesize reduction 3, result has 96.3 percent of original size 78 [2021-10-20 06:27:51,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:52,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:52,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:52,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:52,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:52,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:52,039 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:52,056 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:52,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:52,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:52,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:52,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:52,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:52,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:52,134 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-20 06:27:53,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2122352388] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:27:53,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-20 06:27:53,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 5, 5] total 20 [2021-10-20 06:27:53,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145491581] [2021-10-20 06:27:53,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-20 06:27:53,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:27:53,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-20 06:27:53,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-10-20 06:27:53,821 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:27:56,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:27:56,393 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2021-10-20 06:27:56,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-20 06:27:56,393 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-20 06:27:56,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:27:56,394 INFO L225 Difference]: With dead ends: 52 [2021-10-20 06:27:56,394 INFO L226 Difference]: Without dead ends: 50 [2021-10-20 06:27:56,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 4003.2ms TimeCoverageRelationStatistics Valid=256, Invalid=674, Unknown=0, NotChecked=0, Total=930 [2021-10-20 06:27:56,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-20 06:27:56,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-10-20 06:27:56,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:27:56,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-10-20 06:27:56,409 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 23 [2021-10-20 06:27:56,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:27:56,410 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-10-20 06:27:56,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:27:56,410 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-10-20 06:27:56,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-20 06:27:56,412 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:27:56,412 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:27:56,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-20 06:27:56,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:27:56,634 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-10-20 06:27:56,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:27:56,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1055594250, now seen corresponding path program 1 times [2021-10-20 06:27:56,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:27:56,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006065102] [2021-10-20 06:27:56,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:27:56,635 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:27:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:27:56,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:27:56,779 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:27:56,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006065102] [2021-10-20 06:27:56,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006065102] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-20 06:27:56,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846863680] [2021-10-20 06:27:56,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:27:56,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:27:56,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:27:56,787 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 06:27:56,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-20 06:27:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:27:56,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-20 06:27:56,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:27:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:27:57,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:27:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:27:57,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846863680] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:27:57,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1508639608] [2021-10-20 06:27:57,430 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-10-20 06:27:57,431 INFO L166 IcfgInterpreter]: Building call graph [2021-10-20 06:27:57,431 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-20 06:27:57,431 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-20 06:27:57,432 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-20 06:27:57,463 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:57,465 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:27:57,466 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:57,466 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-20 06:27:57,467 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:27:57,468 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:57,468 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-20 06:27:57,471 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-10-20 06:27:57,475 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 10=[|v_#valid_10|]} [2021-10-20 06:27:57,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:27:57,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-20 06:27:57,486 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:57,486 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-20 06:27:57,487 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:57,487 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-20 06:27:57,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-20 06:27:57,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:57,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:27:57,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:27:57,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:27:57,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:27:57,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-20 06:27:57,516 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:57,518 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-20 06:27:57,519 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:57,519 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-20 06:27:57,520 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-20 06:27:57,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:57,525 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:57,526 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-10-20 06:27:57,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-20 06:27:57,527 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:102, output treesize:87 [2021-10-20 06:27:57,542 INFO L180 QuantifierPusher]: treesize reduction 10, result has 91.7 percent of original size [2021-10-20 06:27:57,547 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-10-20 06:27:57,553 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:57,561 INFO L185 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size 120 [2021-10-20 06:27:57,573 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.1 percent of original size [2021-10-20 06:27:57,583 INFO L185 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size 120 [2021-10-20 06:27:57,588 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.0 percent of original size [2021-10-20 06:27:57,599 INFO L185 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size 120 [2021-10-20 06:27:57,604 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-10-20 06:27:57,613 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-10-20 06:27:57,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,662 INFO L180 QuantifierPusher]: treesize reduction 24, result has 79.8 percent of original size [2021-10-20 06:27:57,672 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-20 06:27:57,678 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:57,686 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-10-20 06:27:57,691 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:57,704 INFO L185 QuantifierPusher]: treesize reduction 3, result has 96.3 percent of original size 78 [2021-10-20 06:27:57,708 INFO L180 QuantifierPusher]: treesize reduction 3, result has 96.9 percent of original size [2021-10-20 06:27:57,715 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-20 06:27:57,726 INFO L180 QuantifierPusher]: treesize reduction 24, result has 79.8 percent of original size [2021-10-20 06:27:57,733 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-20 06:27:57,742 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:57,748 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-10-20 06:27:57,754 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:57,760 INFO L185 QuantifierPusher]: treesize reduction 3, result has 96.3 percent of original size 78 [2021-10-20 06:27:57,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,839 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,880 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:27:57,921 INFO L180 QuantifierPusher]: treesize reduction 32, result has 64.4 percent of original size [2021-10-20 06:27:57,923 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-10-20 06:27:57,930 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:57,936 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-10-20 06:27:57,942 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:57,949 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-10-20 06:27:57,956 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:27:57,963 INFO L185 QuantifierPusher]: treesize reduction 3, result has 96.3 percent of original size 78 [2021-10-20 06:27:57,969 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-20 06:28:00,151 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-20 06:28:00,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-20 06:28:00,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-10-20 06:28:00,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030796803] [2021-10-20 06:28:00,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-20 06:28:00,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:28:00,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-20 06:28:00,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-10-20 06:28:00,153 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:28:00,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:28:00,992 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2021-10-20 06:28:00,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-20 06:28:00,993 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 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 25 [2021-10-20 06:28:00,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:28:00,995 INFO L225 Difference]: With dead ends: 115 [2021-10-20 06:28:00,996 INFO L226 Difference]: Without dead ends: 88 [2021-10-20 06:28:00,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 43 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 2895.5ms TimeCoverageRelationStatistics Valid=541, Invalid=2765, Unknown=0, NotChecked=0, Total=3306 [2021-10-20 06:28:00,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-20 06:28:01,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2021-10-20 06:28:01,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 69 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:28:01,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2021-10-20 06:28:01,026 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 25 [2021-10-20 06:28:01,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:28:01,026 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2021-10-20 06:28:01,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:28:01,027 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2021-10-20 06:28:01,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-20 06:28:01,028 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:28:01,028 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:28:01,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-20 06:28:01,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable29 [2021-10-20 06:28:01,243 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-10-20 06:28:01,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:28:01,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1914628965, now seen corresponding path program 1 times [2021-10-20 06:28:01,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:28:01,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083193101] [2021-10-20 06:28:01,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:28:01,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:28:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:28:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:28:01,355 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:28:01,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083193101] [2021-10-20 06:28:01,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083193101] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-20 06:28:01,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129297930] [2021-10-20 06:28:01,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:28:01,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:28:01,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:28:01,358 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 06:28:01,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-20 06:28:01,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:28:01,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-20 06:28:01,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:28:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:28:01,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:28:01,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:28:01,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129297930] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:28:01,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [100874254] [2021-10-20 06:28:01,777 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-10-20 06:28:01,777 INFO L166 IcfgInterpreter]: Building call graph [2021-10-20 06:28:01,777 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-20 06:28:01,778 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-20 06:28:01,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-20 06:28:01,789 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:01,790 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:28:01,791 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:01,791 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-20 06:28:01,792 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:28:01,792 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:01,793 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-20 06:28:01,794 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-10-20 06:28:01,811 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 10=[|v_#valid_11|]} [2021-10-20 06:28:01,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:28:01,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-20 06:28:01,818 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:01,819 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-20 06:28:01,819 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:01,820 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-20 06:28:01,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-20 06:28:01,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:01,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:01,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:28:01,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:28:01,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:28:01,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:28:01,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-20 06:28:01,834 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:01,840 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-20 06:28:01,841 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:01,841 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-20 06:28:01,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-20 06:28:01,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:01,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:01,849 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:01,850 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-10-20 06:28:01,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-20 06:28:01,850 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:102, output treesize:87 [2021-10-20 06:28:01,861 INFO L180 QuantifierPusher]: treesize reduction 10, result has 91.7 percent of original size [2021-10-20 06:28:01,864 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-10-20 06:28:01,868 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:01,873 INFO L185 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size 120 [2021-10-20 06:28:01,878 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.1 percent of original size [2021-10-20 06:28:01,883 INFO L185 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size 120 [2021-10-20 06:28:01,887 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.0 percent of original size [2021-10-20 06:28:01,893 INFO L185 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size 120 [2021-10-20 06:28:01,897 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-10-20 06:28:01,901 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-10-20 06:28:01,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:01,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:01,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:01,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:01,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:01,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:01,937 INFO L180 QuantifierPusher]: treesize reduction 24, result has 79.8 percent of original size [2021-10-20 06:28:01,941 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-20 06:28:01,944 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:01,949 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-10-20 06:28:01,952 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:01,957 INFO L185 QuantifierPusher]: treesize reduction 3, result has 96.3 percent of original size 78 [2021-10-20 06:28:01,960 INFO L180 QuantifierPusher]: treesize reduction 3, result has 96.9 percent of original size [2021-10-20 06:28:01,963 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-20 06:28:01,972 INFO L180 QuantifierPusher]: treesize reduction 24, result has 79.8 percent of original size [2021-10-20 06:28:01,976 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-20 06:28:01,981 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:01,986 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-10-20 06:28:01,991 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:01,995 INFO L185 QuantifierPusher]: treesize reduction 3, result has 96.3 percent of original size 78 [2021-10-20 06:28:01,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:02,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:02,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:02,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:02,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:02,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:02,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:02,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:02,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:02,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:02,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:02,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:02,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:02,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:02,086 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-20 06:28:03,551 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-20 06:28:03,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-20 06:28:03,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2021-10-20 06:28:03,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112594807] [2021-10-20 06:28:03,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-20 06:28:03,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:28:03,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-20 06:28:03,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-10-20 06:28:03,552 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:28:03,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:28:03,762 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2021-10-20 06:28:03,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-20 06:28:03,763 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 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 25 [2021-10-20 06:28:03,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:28:03,763 INFO L225 Difference]: With dead ends: 72 [2021-10-20 06:28:03,763 INFO L226 Difference]: Without dead ends: 70 [2021-10-20 06:28:03,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 51 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1641.5ms TimeCoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-10-20 06:28:03,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-20 06:28:03,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-10-20 06:28:03,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 66 states have (on average 1.121212121212121) internal successors, (74), 69 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:28:03,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-10-20 06:28:03,784 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 25 [2021-10-20 06:28:03,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:28:03,786 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-10-20 06:28:03,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:28:03,786 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-10-20 06:28:03,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-20 06:28:03,789 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:28:03,789 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-10-20 06:28:03,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-20 06:28:03,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:28:03,998 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-10-20 06:28:03,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:28:03,999 INFO L82 PathProgramCache]: Analyzing trace with hash 162589740, now seen corresponding path program 2 times [2021-10-20 06:28:03,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:28:03,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814802884] [2021-10-20 06:28:03,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:28:03,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:28:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:28:04,166 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:28:04,167 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:28:04,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814802884] [2021-10-20 06:28:04,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814802884] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-20 06:28:04,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347996785] [2021-10-20 06:28:04,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-20 06:28:04,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:28:04,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:28:04,168 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 06:28:04,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-20 06:28:04,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-20 06:28:04,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-20 06:28:04,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-20 06:28:04,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:28:04,689 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:28:04,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:28:04,868 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:28:04,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347996785] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:28:04,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2047881747] [2021-10-20 06:28:04,872 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-10-20 06:28:04,872 INFO L166 IcfgInterpreter]: Building call graph [2021-10-20 06:28:04,873 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-20 06:28:04,873 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-20 06:28:04,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-20 06:28:04,881 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:04,882 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:28:04,882 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:04,883 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-20 06:28:04,883 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:28:04,883 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:04,884 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-20 06:28:04,885 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-10-20 06:28:04,889 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 10=[|v_#valid_12|]} [2021-10-20 06:28:04,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:28:04,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-20 06:28:04,896 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:04,897 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-20 06:28:04,897 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:04,898 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-20 06:28:04,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-20 06:28:04,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:04,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:04,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:28:04,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:28:04,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:28:04,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:28:04,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-20 06:28:04,915 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:04,917 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-20 06:28:04,918 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:04,918 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-20 06:28:04,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-20 06:28:04,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:04,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:04,922 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:04,924 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-10-20 06:28:04,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-20 06:28:04,925 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:102, output treesize:87 [2021-10-20 06:28:04,934 INFO L180 QuantifierPusher]: treesize reduction 10, result has 91.7 percent of original size [2021-10-20 06:28:04,937 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-10-20 06:28:04,942 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:04,946 INFO L185 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size 120 [2021-10-20 06:28:04,952 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.1 percent of original size [2021-10-20 06:28:04,958 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-10-20 06:28:04,977 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:04,981 INFO L185 QuantifierPusher]: treesize reduction 7, result has 94.8 percent of original size 127 [2021-10-20 06:28:04,987 INFO L180 QuantifierPusher]: treesize reduction 7, result has 95.4 percent of original size [2021-10-20 06:28:04,991 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-10-20 06:28:04,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:05,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:05,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:05,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:05,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:05,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:05,028 INFO L180 QuantifierPusher]: treesize reduction 24, result has 79.8 percent of original size [2021-10-20 06:28:05,031 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-20 06:28:05,034 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:05,043 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-10-20 06:28:05,045 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:05,050 INFO L185 QuantifierPusher]: treesize reduction 3, result has 96.3 percent of original size 78 [2021-10-20 06:28:05,053 INFO L180 QuantifierPusher]: treesize reduction 3, result has 96.9 percent of original size [2021-10-20 06:28:05,057 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-20 06:28:05,066 INFO L180 QuantifierPusher]: treesize reduction 24, result has 79.8 percent of original size [2021-10-20 06:28:05,069 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-20 06:28:05,075 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:05,081 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-10-20 06:28:05,086 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:05,090 INFO L185 QuantifierPusher]: treesize reduction 3, result has 96.3 percent of original size 78 [2021-10-20 06:28:05,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:05,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:05,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:05,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:05,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:05,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:05,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:05,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:05,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:05,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:05,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:05,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:05,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:05,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:05,163 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-20 06:28:06,777 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-20 06:28:06,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-20 06:28:06,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-10-20 06:28:06,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018580576] [2021-10-20 06:28:06,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-20 06:28:06,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:28:06,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-20 06:28:06,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-10-20 06:28:06,781 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:28:07,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:28:07,351 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2021-10-20 06:28:07,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-20 06:28:07,361 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-20 06:28:07,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:28:07,362 INFO L225 Difference]: With dead ends: 122 [2021-10-20 06:28:07,362 INFO L226 Difference]: Without dead ends: 120 [2021-10-20 06:28:07,364 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 75 SyntacticMatches, 10 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 2125.1ms TimeCoverageRelationStatistics Valid=440, Invalid=2212, Unknown=0, NotChecked=0, Total=2652 [2021-10-20 06:28:07,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-20 06:28:07,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 74. [2021-10-20 06:28:07,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 70 states have (on average 1.1) internal successors, (77), 73 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:28:07,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2021-10-20 06:28:07,376 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 35 [2021-10-20 06:28:07,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:28:07,376 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2021-10-20 06:28:07,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:28:07,377 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2021-10-20 06:28:07,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-20 06:28:07,378 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:28:07,379 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:28:07,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-20 06:28:07,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:28:07,595 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-10-20 06:28:07,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:28:07,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1565920216, now seen corresponding path program 2 times [2021-10-20 06:28:07,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:28:07,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775794549] [2021-10-20 06:28:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:28:07,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:28:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:28:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:28:07,840 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:28:07,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775794549] [2021-10-20 06:28:07,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775794549] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-20 06:28:07,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033315935] [2021-10-20 06:28:07,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-20 06:28:07,841 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:28:07,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:28:07,842 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 06:28:07,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-20 06:28:08,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-20 06:28:08,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-20 06:28:08,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-20 06:28:08,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:28:08,313 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-20 06:28:08,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:28:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-20 06:28:08,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033315935] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:28:08,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1400518827] [2021-10-20 06:28:08,530 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-10-20 06:28:08,531 INFO L166 IcfgInterpreter]: Building call graph [2021-10-20 06:28:08,531 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-20 06:28:08,531 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-20 06:28:08,532 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-20 06:28:08,546 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:08,547 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:28:08,548 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:08,548 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-20 06:28:08,548 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:28:08,549 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:08,549 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-20 06:28:08,551 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-10-20 06:28:08,553 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_12|], 10=[|v_#valid_13|]} [2021-10-20 06:28:08,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:28:08,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-20 06:28:08,560 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:08,561 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-20 06:28:08,561 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:08,562 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-20 06:28:08,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-20 06:28:08,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:08,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:28:08,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:28:08,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:28:08,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:28:08,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-20 06:28:08,582 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:08,583 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-20 06:28:08,584 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:08,584 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-20 06:28:08,585 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-20 06:28:08,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:08,589 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:08,590 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-10-20 06:28:08,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-20 06:28:08,591 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:102, output treesize:87 [2021-10-20 06:28:08,603 INFO L180 QuantifierPusher]: treesize reduction 10, result has 91.7 percent of original size [2021-10-20 06:28:08,607 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-10-20 06:28:08,611 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:08,616 INFO L185 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size 120 [2021-10-20 06:28:08,623 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.1 percent of original size [2021-10-20 06:28:08,628 INFO L185 QuantifierPusher]: treesize reduction 5, result has 96.0 percent of original size 120 [2021-10-20 06:28:08,633 INFO L180 QuantifierPusher]: treesize reduction 5, result has 96.6 percent of original size [2021-10-20 06:28:08,640 INFO L185 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size 120 [2021-10-20 06:28:08,645 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-10-20 06:28:08,653 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-10-20 06:28:08,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,687 INFO L180 QuantifierPusher]: treesize reduction 24, result has 79.8 percent of original size [2021-10-20 06:28:08,691 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-20 06:28:08,695 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:08,699 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-10-20 06:28:08,708 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:08,712 INFO L185 QuantifierPusher]: treesize reduction 3, result has 96.3 percent of original size 78 [2021-10-20 06:28:08,715 INFO L180 QuantifierPusher]: treesize reduction 3, result has 96.9 percent of original size [2021-10-20 06:28:08,719 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-20 06:28:08,727 INFO L180 QuantifierPusher]: treesize reduction 24, result has 79.8 percent of original size [2021-10-20 06:28:08,731 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-20 06:28:08,737 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:08,743 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-10-20 06:28:08,748 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:08,752 INFO L185 QuantifierPusher]: treesize reduction 3, result has 96.3 percent of original size 78 [2021-10-20 06:28:08,755 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,832 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:08,846 INFO L180 QuantifierPusher]: treesize reduction 32, result has 64.4 percent of original size [2021-10-20 06:28:08,848 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-10-20 06:28:08,853 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:08,857 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-10-20 06:28:08,862 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:08,866 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-10-20 06:28:08,872 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:08,876 INFO L185 QuantifierPusher]: treesize reduction 3, result has 96.3 percent of original size 78 [2021-10-20 06:28:08,880 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-20 06:28:11,000 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-20 06:28:11,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-20 06:28:11,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 18 [2021-10-20 06:28:11,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444397759] [2021-10-20 06:28:11,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-20 06:28:11,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:28:11,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-20 06:28:11,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2021-10-20 06:28:11,003 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:28:11,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:28:11,398 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2021-10-20 06:28:11,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-20 06:28:11,399 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 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 45 [2021-10-20 06:28:11,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:28:11,400 INFO L225 Difference]: With dead ends: 74 [2021-10-20 06:28:11,400 INFO L226 Difference]: Without dead ends: 56 [2021-10-20 06:28:11,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 99 SyntacticMatches, 12 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 2567.6ms TimeCoverageRelationStatistics Valid=328, Invalid=1834, Unknown=0, NotChecked=0, Total=2162 [2021-10-20 06:28:11,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-20 06:28:11,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-10-20 06:28:11,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:28:11,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-10-20 06:28:11,413 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 45 [2021-10-20 06:28:11,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:28:11,414 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-10-20 06:28:11,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:28:11,414 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-10-20 06:28:11,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-20 06:28:11,420 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:28:11,420 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2021-10-20 06:28:11,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-20 06:28:11,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:28:11,637 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-10-20 06:28:11,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:28:11,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1979889530, now seen corresponding path program 3 times [2021-10-20 06:28:11,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:28:11,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42637352] [2021-10-20 06:28:11,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:28:11,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:28:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:28:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-20 06:28:11,899 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:28:11,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42637352] [2021-10-20 06:28:11,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42637352] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-20 06:28:11,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918724853] [2021-10-20 06:28:11,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-20 06:28:11,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:28:11,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:28:11,915 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 06:28:11,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-20 06:28:12,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-20 06:28:12,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-20 06:28:12,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-20 06:28:12,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:28:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:28:13,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:28:13,498 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:28:13,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918724853] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:28:13,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [546745470] [2021-10-20 06:28:13,501 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-10-20 06:28:13,501 INFO L166 IcfgInterpreter]: Building call graph [2021-10-20 06:28:13,502 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-20 06:28:13,502 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-20 06:28:13,502 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-20 06:28:13,508 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:13,509 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:28:13,509 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:13,510 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-20 06:28:13,510 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:28:13,511 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:13,511 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-20 06:28:13,512 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-10-20 06:28:13,515 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 10=[|v_#valid_14|]} [2021-10-20 06:28:13,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:28:13,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-20 06:28:13,523 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:13,524 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-20 06:28:13,524 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:13,525 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-20 06:28:13,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-20 06:28:13,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:13,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:13,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:28:13,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:28:13,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:28:13,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:28:13,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-20 06:28:13,540 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:13,542 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-20 06:28:13,543 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:13,543 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-20 06:28:13,543 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-20 06:28:13,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:13,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:13,547 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:13,548 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-10-20 06:28:13,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-20 06:28:13,549 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:102, output treesize:87 [2021-10-20 06:28:13,558 INFO L180 QuantifierPusher]: treesize reduction 10, result has 91.7 percent of original size [2021-10-20 06:28:13,561 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-10-20 06:28:13,565 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:13,574 INFO L185 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size 120 [2021-10-20 06:28:13,578 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.1 percent of original size [2021-10-20 06:28:13,582 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-10-20 06:28:13,586 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:13,592 INFO L185 QuantifierPusher]: treesize reduction 7, result has 94.8 percent of original size 127 [2021-10-20 06:28:13,596 INFO L180 QuantifierPusher]: treesize reduction 7, result has 95.4 percent of original size [2021-10-20 06:28:13,600 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-10-20 06:28:13,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:13,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:13,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:13,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:13,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:13,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:13,625 INFO L180 QuantifierPusher]: treesize reduction 24, result has 79.8 percent of original size [2021-10-20 06:28:13,634 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-20 06:28:13,637 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:13,641 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-10-20 06:28:13,643 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:13,646 INFO L185 QuantifierPusher]: treesize reduction 3, result has 96.3 percent of original size 78 [2021-10-20 06:28:13,649 INFO L180 QuantifierPusher]: treesize reduction 3, result has 96.9 percent of original size [2021-10-20 06:28:13,652 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-20 06:28:13,659 INFO L180 QuantifierPusher]: treesize reduction 24, result has 79.8 percent of original size [2021-10-20 06:28:13,662 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-20 06:28:13,667 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:13,670 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-10-20 06:28:13,675 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:28:13,679 INFO L185 QuantifierPusher]: treesize reduction 3, result has 96.3 percent of original size 78 [2021-10-20 06:28:13,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:13,692 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:13,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:13,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:13,695 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:13,699 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:13,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:13,715 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:13,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:13,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:13,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:13,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:13,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:13,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:13,751 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-20 06:28:15,522 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-20 06:28:15,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-20 06:28:15,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 28 [2021-10-20 06:28:15,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901910044] [2021-10-20 06:28:15,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-20 06:28:15,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:28:15,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-20 06:28:15,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1343, Unknown=0, NotChecked=0, Total=1560 [2021-10-20 06:28:15,524 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:28:16,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:28:16,431 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-10-20 06:28:16,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-20 06:28:16,432 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 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 55 [2021-10-20 06:28:16,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:28:16,432 INFO L225 Difference]: With dead ends: 73 [2021-10-20 06:28:16,432 INFO L226 Difference]: Without dead ends: 0 [2021-10-20 06:28:16,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 124 SyntacticMatches, 14 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1899 ImplicationChecksByTransitivity, 2772.6ms TimeCoverageRelationStatistics Valid=862, Invalid=3968, Unknown=0, NotChecked=0, Total=4830 [2021-10-20 06:28:16,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-20 06:28:16,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-20 06:28:16,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:28:16,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-20 06:28:16,435 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 55 [2021-10-20 06:28:16,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:28:16,435 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-20 06:28:16,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:28:16,435 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-20 06:28:16,435 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-20 06:28:16,437 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 06:28:16,438 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 06:28:16,438 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 06:28:16,438 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 06:28:16,438 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 06:28:16,438 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 06:28:16,438 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 06:28:16,438 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 06:28:16,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-20 06:28:16,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-10-20 06:28:16,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-20 06:28:16,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:16,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:16,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:16,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:16,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:16,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:16,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:16,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:16,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:28:18,701 INFO L853 garLoopResultBuilder]: At program point L18-17(lines 17 22) the Hoare annotation is: (let ((.cse20 (select |#memory_int| |#t~string0.base|))) (let ((.cse0 (= (select |#valid| |#t~string1.base|) 1)) (.cse1 (< |#StackHeapBarrier| |#t~string1.base|)) (.cse2 (<= 0 ULTIMATE.start_main_~buf~0)) (.cse3 (= (select .cse20 (+ |#t~string0.offset| 1)) 0)) (.cse4 (= 2 (select |#length| |#t~string0.base|))) (.cse6 (<= 0 ULTIMATE.start_main_~in~0)) (.cse7 (<= ULTIMATE.start_main_~bufferlen~0 2147483647)) (.cse8 (= (select |#valid| 0) 0)) (.cse9 (= (select |#valid| |#t~string0.base|) 1)) (.cse10 (= |#NULL.offset| 0)) (.cse11 (< |#StackHeapBarrier| |#t~string0.base|)) (.cse12 (= (select |#length| |#t~string1.base|) 9)) (.cse13 (= 48 (select .cse20 |#t~string0.offset|))) (.cse14 (= |#t~string1.offset| 0)) (.cse15 (< 0 ULTIMATE.start_main_~inlen~0)) (.cse16 (= |#t~string0.offset| 0)) (.cse5 (+ ULTIMATE.start_main_~buflim~0 1)) (.cse17 (<= ULTIMATE.start_main_~inlen~0 2147483647)) (.cse18 (< 0 |#StackHeapBarrier|)) (.cse19 (= |#NULL.base| 0))) (or (and (= ULTIMATE.start_main_~buf~0 0) (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (<= 2 ULTIMATE.start_main_~bufferlen~0)) (and .cse0 .cse1 .cse2 .cse3 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse4 (<= 0 .cse5) .cse6 (<= ULTIMATE.start_main_~buflim~0 2147483645) (<= ULTIMATE.start_main_~buf~0 2) .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 (<= (+ 2 ULTIMATE.start_main_~buf~0) ULTIMATE.start_main_~bufferlen~0) .cse13 .cse14 .cse15 .cse16 .cse17 .cse18 .cse19) (and .cse0 .cse1 .cse2 .cse3 .cse4 (= ULTIMATE.start_main_~bufferlen~0 (+ 2 ULTIMATE.start_main_~buflim~0)) .cse6 (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 .cse15 .cse16 (< ULTIMATE.start_main_~buf~0 .cse5) .cse17 .cse18 .cse19)))) [2021-10-20 06:28:18,702 INFO L857 garLoopResultBuilder]: For program point L18-18(lines 18 20) no Hoare annotation was computed. [2021-10-20 06:28:18,702 INFO L853 garLoopResultBuilder]: At program point L18-20(lines 17 22) the Hoare annotation is: (and (<= (+ ULTIMATE.start_main_~buf~0 1) ULTIMATE.start_main_~bufferlen~0) (<= 0 ULTIMATE.start_main_~buf~0) (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (<= 2 ULTIMATE.start_main_~bufferlen~0)) [2021-10-20 06:28:18,702 INFO L857 garLoopResultBuilder]: For program point L18-21(lines 18 20) no Hoare annotation was computed. [2021-10-20 06:28:18,702 INFO L860 garLoopResultBuilder]: At program point L18-23(lines 17 22) the Hoare annotation is: true [2021-10-20 06:28:18,703 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-20 06:28:18,703 INFO L857 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-10-20 06:28:18,703 INFO L857 garLoopResultBuilder]: For program point L19-1(line 19) no Hoare annotation was computed. [2021-10-20 06:28:18,703 INFO L857 garLoopResultBuilder]: For program point L19-2(line 19) no Hoare annotation was computed. [2021-10-20 06:28:18,703 INFO L857 garLoopResultBuilder]: For program point L19-3(line 19) no Hoare annotation was computed. [2021-10-20 06:28:18,703 INFO L857 garLoopResultBuilder]: For program point L19-4(line 19) no Hoare annotation was computed. [2021-10-20 06:28:18,703 INFO L857 garLoopResultBuilder]: For program point L19-5(line 19) no Hoare annotation was computed. [2021-10-20 06:28:18,703 INFO L857 garLoopResultBuilder]: For program point L19-6(line 19) no Hoare annotation was computed. [2021-10-20 06:28:18,703 INFO L857 garLoopResultBuilder]: For program point L19-7(line 19) no Hoare annotation was computed. [2021-10-20 06:28:18,704 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-20 06:28:18,704 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-20 06:28:18,704 INFO L857 garLoopResultBuilder]: For program point L37-1(lines 37 48) no Hoare annotation was computed. [2021-10-20 06:28:18,704 INFO L857 garLoopResultBuilder]: For program point L37-3(lines 37 48) no Hoare annotation was computed. [2021-10-20 06:28:18,704 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-20 06:28:18,704 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-20 06:28:18,704 INFO L860 garLoopResultBuilder]: At program point L55(lines 25 56) the Hoare annotation is: true [2021-10-20 06:28:18,704 INFO L857 garLoopResultBuilder]: For program point L39(lines 39 40) no Hoare annotation was computed. [2021-10-20 06:28:18,704 INFO L857 garLoopResultBuilder]: For program point L31(line 31) no Hoare annotation was computed. [2021-10-20 06:28:18,704 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-20 06:28:18,704 INFO L857 garLoopResultBuilder]: For program point L31-1(lines 25 56) no Hoare annotation was computed. [2021-10-20 06:28:18,705 INFO L857 garLoopResultBuilder]: For program point L32(lines 25 56) no Hoare annotation was computed. [2021-10-20 06:28:18,705 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-20 06:28:18,705 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-20 06:28:18,705 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-20 06:28:18,705 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-20 06:28:18,705 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-10-20 06:28:18,705 INFO L853 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: (let ((.cse18 (select |#memory_int| |#t~string0.base|))) (let ((.cse0 (= (select |#valid| |#t~string1.base|) 1)) (.cse1 (< |#StackHeapBarrier| |#t~string1.base|)) (.cse2 (= (select .cse18 (+ |#t~string0.offset| 1)) 0)) (.cse3 (= 2 (select |#length| |#t~string0.base|))) (.cse4 (= ULTIMATE.start_main_~bufferlen~0 (+ 2 ULTIMATE.start_main_~buflim~0))) (.cse5 (< ULTIMATE.start_main_~buf~0 ULTIMATE.start_main_~buflim~0)) (.cse6 (= (select |#valid| 0) 0)) (.cse7 (= (select |#valid| |#t~string0.base|) 1)) (.cse8 (= |#NULL.offset| 0)) (.cse9 (< |#StackHeapBarrier| |#t~string0.base|)) (.cse10 (= (select |#length| |#t~string1.base|) 9)) (.cse11 (= |ULTIMATE.start___VERIFIER_assert_#in~cond| (ite (<= 0 ULTIMATE.start_main_~buf~0) 1 0))) (.cse12 (= 48 (select .cse18 |#t~string0.offset|))) (.cse13 (= |#t~string1.offset| 0)) (.cse14 (= |#t~string0.offset| 0)) (.cse15 (<= ULTIMATE.start_main_~inlen~0 2147483647)) (.cse16 (< 0 |#StackHeapBarrier|)) (.cse17 (= |#NULL.base| 0))) (or (and (<= 1 ULTIMATE.start_main_~in~0) .cse0 .cse1 .cse2 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse3 .cse4 (<= ULTIMATE.start___VERIFIER_assert_~cond 1) (<= (+ ULTIMATE.start_main_~in~0 3 ULTIMATE.start_main_~buflim~0) (+ ULTIMATE.start_main_~buf~0 ULTIMATE.start_main_~inlen~0)) .cse5 (<= ULTIMATE.start_main_~bufferlen~0 2147483647) (<= 1 ULTIMATE.start_main_~buf~0) .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 .cse15 .cse16 .cse17) (and .cse0 .cse1 .cse2 .cse3 (= ULTIMATE.start_main_~buf~0 0) .cse4 (<= (+ 3 ULTIMATE.start_main_~buflim~0) ULTIMATE.start_main_~inlen~0) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~in~0 0) .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 .cse15 .cse16 .cse17)))) [2021-10-20 06:28:18,705 INFO L857 garLoopResultBuilder]: For program point L18-3(lines 18 20) no Hoare annotation was computed. [2021-10-20 06:28:18,706 INFO L853 garLoopResultBuilder]: At program point L18-5(lines 17 22) the Hoare annotation is: (let ((.cse0 (select |#memory_int| |#t~string0.base|))) (and (= (select |#valid| |#t~string1.base|) 1) (< |#StackHeapBarrier| |#t~string1.base|) (<= 0 ULTIMATE.start_main_~buf~0) (= (select .cse0 (+ |#t~string0.offset| 1)) 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond| 1) (= 2 (select |#length| |#t~string0.base|)) (= ULTIMATE.start_main_~bufferlen~0 (+ 2 ULTIMATE.start_main_~buflim~0)) (<= 0 ULTIMATE.start_main_~in~0) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= (+ ULTIMATE.start_main_~in~0 3 ULTIMATE.start_main_~buflim~0) (+ ULTIMATE.start_main_~buf~0 ULTIMATE.start_main_~inlen~0)) (< ULTIMATE.start_main_~buf~0 ULTIMATE.start_main_~buflim~0) (<= ULTIMATE.start_main_~bufferlen~0 2147483647) (= (select |#valid| 0) 0) (= (select |#valid| |#t~string0.base|) 1) (= |#NULL.offset| 0) (< |#StackHeapBarrier| |#t~string0.base|) (= (select |#length| |#t~string1.base|) 9) (= 48 (select .cse0 |#t~string0.offset|)) (= |#t~string1.offset| 0) (= |#t~string0.offset| 0) (<= ULTIMATE.start_main_~inlen~0 2147483647) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2021-10-20 06:28:18,706 INFO L857 garLoopResultBuilder]: For program point L18-6(lines 18 20) no Hoare annotation was computed. [2021-10-20 06:28:18,706 INFO L853 garLoopResultBuilder]: At program point L18-8(lines 17 22) the Hoare annotation is: (let ((.cse0 (select |#memory_int| |#t~string0.base|))) (and (<= 1 ULTIMATE.start_main_~in~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond| ULTIMATE.start___VERIFIER_assert_~cond) (= (select |#valid| |#t~string1.base|) 1) (< |#StackHeapBarrier| |#t~string1.base|) (= (select .cse0 (+ |#t~string0.offset| 1)) 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond| 1) (= 2 (select |#length| |#t~string0.base|)) (= ULTIMATE.start_main_~bufferlen~0 (+ 2 ULTIMATE.start_main_~buflim~0)) (<= (+ ULTIMATE.start_main_~in~0 3 ULTIMATE.start_main_~buflim~0) (+ ULTIMATE.start_main_~buf~0 ULTIMATE.start_main_~inlen~0)) (<= ULTIMATE.start_main_~bufferlen~0 2147483647) (<= 1 ULTIMATE.start_main_~buf~0) (= (select |#valid| 0) 0) (= (select |#valid| |#t~string0.base|) 1) (= |#NULL.offset| 0) (< |#StackHeapBarrier| |#t~string0.base|) (= (select |#length| |#t~string1.base|) 9) (= 48 (select .cse0 |#t~string0.offset|)) (= |#t~string1.offset| 0) (= |#t~string0.offset| 0) (< ULTIMATE.start_main_~buf~0 (+ ULTIMATE.start_main_~buflim~0 1)) (<= ULTIMATE.start_main_~inlen~0 2147483647) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2021-10-20 06:28:18,706 INFO L857 garLoopResultBuilder]: For program point L18-9(lines 18 20) no Hoare annotation was computed. [2021-10-20 06:28:18,707 INFO L853 garLoopResultBuilder]: At program point L18-11(lines 17 48) the Hoare annotation is: (let ((.cse5 (+ 2 ULTIMATE.start_main_~buflim~0)) (.cse18 (select |#memory_int| |#t~string0.base|))) (let ((.cse0 (= (select |#valid| |#t~string1.base|) 1)) (.cse1 (< |#StackHeapBarrier| |#t~string1.base|)) (.cse2 (= (select .cse18 (+ |#t~string0.offset| 1)) 0)) (.cse3 (= 2 (select |#length| |#t~string0.base|))) (.cse4 (= ULTIMATE.start_main_~bufferlen~0 .cse5)) (.cse6 (= (select |#valid| 0) 0)) (.cse7 (= (select |#valid| |#t~string0.base|) 1)) (.cse8 (= |#NULL.offset| 0)) (.cse9 (< |#StackHeapBarrier| |#t~string0.base|)) (.cse10 (= (select |#length| |#t~string1.base|) 9)) (.cse11 (= 48 (select .cse18 |#t~string0.offset|))) (.cse12 (= |#t~string1.offset| 0)) (.cse13 (= |#t~string0.offset| 0)) (.cse14 (< ULTIMATE.start_main_~buf~0 (+ ULTIMATE.start_main_~buflim~0 1))) (.cse15 (<= ULTIMATE.start_main_~inlen~0 2147483647)) (.cse16 (< 0 |#StackHeapBarrier|)) (.cse17 (= |#NULL.base| 0))) (or (and .cse0 .cse1 .cse2 (<= ULTIMATE.start_main_~in~0 0) .cse3 (= ULTIMATE.start_main_~buf~0 0) .cse4 (<= 0 ULTIMATE.start_main_~in~0) (< .cse5 ULTIMATE.start_main_~inlen~0) .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 .cse15 .cse16 .cse17) (and (<= 1 ULTIMATE.start_main_~in~0) .cse0 .cse1 .cse2 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= |ULTIMATE.start___VERIFIER_assert_#in~cond| 1) .cse3 .cse4 (<= ULTIMATE.start___VERIFIER_assert_~cond 1) (<= (+ ULTIMATE.start_main_~in~0 3 ULTIMATE.start_main_~buflim~0) (+ ULTIMATE.start_main_~buf~0 ULTIMATE.start_main_~inlen~0)) (<= ULTIMATE.start_main_~bufferlen~0 2147483647) (<= 1 ULTIMATE.start_main_~buf~0) .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 .cse15 .cse16 .cse17)))) [2021-10-20 06:28:18,707 INFO L857 garLoopResultBuilder]: For program point L18-12(lines 18 20) no Hoare annotation was computed. [2021-10-20 06:28:18,707 INFO L853 garLoopResultBuilder]: At program point L18-14(lines 17 22) the Hoare annotation is: (let ((.cse23 (select |#memory_int| |#t~string0.base|))) (let ((.cse0 (<= 1 ULTIMATE.start_main_~in~0)) (.cse1 (= (select |#valid| |#t~string1.base|) 1)) (.cse2 (< |#StackHeapBarrier| |#t~string1.base|)) (.cse3 (= (select .cse23 (+ |#t~string0.offset| 1)) 0)) (.cse4 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse5 (= |ULTIMATE.start___VERIFIER_assert_#in~cond| 1)) (.cse6 (= 2 (select |#length| |#t~string0.base|))) (.cse7 (< ULTIMATE.start_main_~in~0 ULTIMATE.start_main_~inlen~0)) (.cse8 (<= ULTIMATE.start___VERIFIER_assert_~cond 1)) (.cse19 (+ ULTIMATE.start_main_~buflim~0 1)) (.cse9 (<= ULTIMATE.start_main_~bufferlen~0 2147483647)) (.cse10 (<= 1 ULTIMATE.start_main_~buf~0)) (.cse11 (= (select |#valid| 0) 0)) (.cse12 (= (select |#valid| |#t~string0.base|) 1)) (.cse13 (= |#NULL.offset| 0)) (.cse14 (< |#StackHeapBarrier| |#t~string0.base|)) (.cse15 (= (select |#length| |#t~string1.base|) 9)) (.cse16 (= 48 (select .cse23 |#t~string0.offset|))) (.cse17 (= |#t~string1.offset| 0)) (.cse18 (= |#t~string0.offset| 0)) (.cse20 (<= ULTIMATE.start_main_~inlen~0 2147483647)) (.cse21 (< 0 |#StackHeapBarrier|)) (.cse22 (= |#NULL.base| 0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 (= ULTIMATE.start_main_~bufferlen~0 (+ 2 ULTIMATE.start_main_~buflim~0)) .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 .cse15 .cse16 .cse17 .cse18 (< ULTIMATE.start_main_~buf~0 .cse19) .cse20 .cse21 .cse22) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 (<= 0 .cse19) .cse8 (<= ULTIMATE.start_main_~buflim~0 2147483645) (not (= .cse19 ULTIMATE.start_main_~buf~0)) (<= ULTIMATE.start_main_~buf~0 2) .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 .cse15 (<= (+ 2 ULTIMATE.start_main_~buf~0) ULTIMATE.start_main_~bufferlen~0) .cse16 .cse17 .cse18 .cse20 .cse21 .cse22) (and (= ULTIMATE.start_main_~buf~0 0) (= ULTIMATE.start_main_~in~0 0) (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (<= 2 ULTIMATE.start_main_~bufferlen~0))))) [2021-10-20 06:28:18,707 INFO L857 garLoopResultBuilder]: For program point L18-15(lines 18 20) no Hoare annotation was computed. [2021-10-20 06:28:18,712 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-20 06:28:18,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:28:18 BoogieIcfgContainer [2021-10-20 06:28:18,778 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-20 06:28:18,787 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-20 06:28:18,787 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-20 06:28:18,788 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-20 06:28:18,788 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:27:48" (3/4) ... [2021-10-20 06:28:18,791 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-20 06:28:18,806 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2021-10-20 06:28:18,806 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-20 06:28:18,807 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-20 06:28:18,807 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-20 06:28:18,837 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((((((((((((\valid["assert.h"] == 1 && unknown-#StackHeapBarrier-unknown < "assert.h") && unknown-#memory_int-unknown["0"]["0" + 1] == 0) && in <= 0) && 2 == unknown-#length-unknown["0"]) && buf == 0) && bufferlen == 2 + buflim) && 0 <= in) && 2 + buflim < inlen) && \valid[0] == 0) && \valid["0"] == 1) && #NULL == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["assert.h"] == 9) && 48 == unknown-#memory_int-unknown["0"]["0"]) && "assert.h" == 0) && "0" == 0) && buf < buflim + 1) && inlen <= 2147483647) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) || (((((((((((((((((((((((1 <= in && \valid["assert.h"] == 1) && unknown-#StackHeapBarrier-unknown < "assert.h") && unknown-#memory_int-unknown["0"]["0" + 1] == 0) && 1 <= cond) && \old(cond) == 1) && 2 == unknown-#length-unknown["0"]) && bufferlen == 2 + buflim) && cond <= 1) && in + 3 + buflim <= buf + inlen) && bufferlen <= 2147483647) && 1 <= buf) && \valid[0] == 0) && \valid["0"] == 1) && #NULL == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["assert.h"] == 9) && 48 == unknown-#memory_int-unknown["0"]["0"]) && "assert.h" == 0) && "0" == 0) && buf < buflim + 1) && inlen <= 2147483647) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) [2021-10-20 06:28:18,837 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((((((((((((((((1 <= in && \valid["assert.h"] == 1) && unknown-#StackHeapBarrier-unknown < "assert.h") && unknown-#memory_int-unknown["0"]["0" + 1] == 0) && 1 <= cond) && \old(cond) == 1) && 2 == unknown-#length-unknown["0"]) && in < inlen) && bufferlen == 2 + buflim) && cond <= 1) && bufferlen <= 2147483647) && 1 <= buf) && \valid[0] == 0) && \valid["0"] == 1) && #NULL == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["assert.h"] == 9) && 48 == unknown-#memory_int-unknown["0"]["0"]) && "assert.h" == 0) && "0" == 0) && buf < buflim + 1) && inlen <= 2147483647) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) || ((((((((((((((((((((((((((1 <= in && \valid["assert.h"] == 1) && unknown-#StackHeapBarrier-unknown < "assert.h") && unknown-#memory_int-unknown["0"]["0" + 1] == 0) && 1 <= cond) && \old(cond) == 1) && 2 == unknown-#length-unknown["0"]) && in < inlen) && 0 <= buflim + 1) && cond <= 1) && buflim <= 2147483645) && !(buflim + 1 == buf)) && buf <= 2) && bufferlen <= 2147483647) && 1 <= buf) && \valid[0] == 0) && \valid["0"] == 1) && #NULL == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["assert.h"] == 9) && 2 + buf <= bufferlen) && 48 == unknown-#memory_int-unknown["0"]["0"]) && "assert.h" == 0) && "0" == 0) && inlen <= 2147483647) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0)) || (((buf == 0 && in == 0) && !(0 == cond)) && 2 <= bufferlen) [2021-10-20 06:28:18,838 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((((((((((((((((((((1 <= in && \valid["assert.h"] == 1) && unknown-#StackHeapBarrier-unknown < "assert.h") && unknown-#memory_int-unknown["0"]["0" + 1] == 0) && 1 <= cond) && 2 == unknown-#length-unknown["0"]) && bufferlen == 2 + buflim) && cond <= 1) && in + 3 + buflim <= buf + inlen) && buf < buflim) && bufferlen <= 2147483647) && 1 <= buf) && \valid[0] == 0) && \valid["0"] == 1) && #NULL == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["assert.h"] == 9) && \old(cond) == (if 0 <= buf then 1 else 0)) && 48 == unknown-#memory_int-unknown["0"]["0"]) && "assert.h" == 0) && "0" == 0) && inlen <= 2147483647) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) || (((((((((((((((((((((\valid["assert.h"] == 1 && unknown-#StackHeapBarrier-unknown < "assert.h") && unknown-#memory_int-unknown["0"]["0" + 1] == 0) && 2 == unknown-#length-unknown["0"]) && buf == 0) && bufferlen == 2 + buflim) && 3 + buflim <= inlen) && 1 == cond) && in == 0) && buf < buflim) && \valid[0] == 0) && \valid["0"] == 1) && #NULL == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["assert.h"] == 9) && \old(cond) == (if 0 <= buf then 1 else 0)) && 48 == unknown-#memory_int-unknown["0"]["0"]) && "assert.h" == 0) && "0" == 0) && inlen <= 2147483647) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) [2021-10-20 06:28:18,838 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((((((((((((((((((\valid["assert.h"] == 1 && unknown-#StackHeapBarrier-unknown < "assert.h") && 0 <= buf) && unknown-#memory_int-unknown["0"]["0" + 1] == 0) && \old(cond) == 1) && 2 == unknown-#length-unknown["0"]) && bufferlen == 2 + buflim) && 0 <= in) && 1 == cond) && in + 3 + buflim <= buf + inlen) && buf < buflim) && bufferlen <= 2147483647) && \valid[0] == 0) && \valid["0"] == 1) && #NULL == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["assert.h"] == 9) && 48 == unknown-#memory_int-unknown["0"]["0"]) && "assert.h" == 0) && "0" == 0) && inlen <= 2147483647) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0 [2021-10-20 06:28:18,839 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((((((((((((((((((1 <= in && \old(cond) == cond) && \valid["assert.h"] == 1) && unknown-#StackHeapBarrier-unknown < "assert.h") && unknown-#memory_int-unknown["0"]["0" + 1] == 0) && \old(cond) == 1) && 2 == unknown-#length-unknown["0"]) && bufferlen == 2 + buflim) && in + 3 + buflim <= buf + inlen) && bufferlen <= 2147483647) && 1 <= buf) && \valid[0] == 0) && \valid["0"] == 1) && #NULL == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["assert.h"] == 9) && 48 == unknown-#memory_int-unknown["0"]["0"]) && "assert.h" == 0) && "0" == 0) && buf < buflim + 1) && inlen <= 2147483647) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0 [2021-10-20 06:28:18,857 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/witness.graphml [2021-10-20 06:28:18,857 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-20 06:28:18,858 INFO L168 Benchmark]: Toolchain (without parser) took 30853.96 ms. Allocated memory was 100.7 MB in the beginning and 224.4 MB in the end (delta: 123.7 MB). Free memory was 66.0 MB in the beginning and 154.5 MB in the end (delta: -88.6 MB). Peak memory consumption was 36.1 MB. Max. memory is 16.1 GB. [2021-10-20 06:28:18,858 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 100.7 MB. Free memory is still 55.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 06:28:18,859 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.69 ms. Allocated memory was 100.7 MB in the beginning and 127.9 MB in the end (delta: 27.3 MB). Free memory was 65.9 MB in the beginning and 102.5 MB in the end (delta: -36.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-20 06:28:18,859 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.95 ms. Allocated memory is still 127.9 MB. Free memory was 101.9 MB in the beginning and 100.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 06:28:18,859 INFO L168 Benchmark]: Boogie Preprocessor took 26.67 ms. Allocated memory is still 127.9 MB. Free memory was 100.6 MB in the beginning and 99.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 06:28:18,860 INFO L168 Benchmark]: RCFGBuilder took 431.63 ms. Allocated memory is still 127.9 MB. Free memory was 99.1 MB in the beginning and 87.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-20 06:28:18,860 INFO L168 Benchmark]: TraceAbstraction took 29972.09 ms. Allocated memory was 127.9 MB in the beginning and 224.4 MB in the end (delta: 96.5 MB). Free memory was 86.6 MB in the beginning and 157.7 MB in the end (delta: -71.1 MB). Peak memory consumption was 122.2 MB. Max. memory is 16.1 GB. [2021-10-20 06:28:18,860 INFO L168 Benchmark]: Witness Printer took 70.41 ms. Allocated memory is still 224.4 MB. Free memory was 157.7 MB in the beginning and 154.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-20 06:28:18,862 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 100.7 MB. Free memory is still 55.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 297.69 ms. Allocated memory was 100.7 MB in the beginning and 127.9 MB in the end (delta: 27.3 MB). Free memory was 65.9 MB in the beginning and 102.5 MB in the end (delta: -36.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.95 ms. Allocated memory is still 127.9 MB. Free memory was 101.9 MB in the beginning and 100.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.67 ms. Allocated memory is still 127.9 MB. Free memory was 100.6 MB in the beginning and 99.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 431.63 ms. Allocated memory is still 127.9 MB. Free memory was 99.1 MB in the beginning and 87.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 29972.09 ms. Allocated memory was 127.9 MB in the beginning and 224.4 MB in the end (delta: 96.5 MB). Free memory was 86.6 MB in the beginning and 157.7 MB in the end (delta: -71.1 MB). Peak memory consumption was 122.2 MB. Max. memory is 16.1 GB. * Witness Printer took 70.41 ms. Allocated memory is still 224.4 MB. Free memory was 157.7 MB in the beginning and 154.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 29807.3ms, OverallIterations: 12, TraceHistogramMax: 5, EmptinessCheckTime: 30.5ms, AutomataDifference: 6280.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 2058.5ms, InitialAbstractionConstructionTime: 15.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 300 SDtfs, 998 SDslu, 858 SDs, 0 SdLazy, 1049 SolverSat, 517 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1162.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 816 GetRequests, 454 SyntacticMatches, 54 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5608 ImplicationChecksByTransitivity, 16228.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=10, InterpolantAutomatonStates: 163, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 202.7ms AutomataMinimizationTime, 12 MinimizatonAttempts, 87 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 9 LocationsWithAnnotation, 9 PreInvPairs, 53 NumberOfFragments, 1030 HoareAnnotationTreeSize, 9 FomulaSimplifications, 20322 FormulaSimplificationTreeSizeReduction, 295.0ms HoareSimplificationTime, 9 FomulaSimplificationsInter, 2621 FormulaSimplificationTreeSizeReductionInter, 1754.8ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 89.2ms SsaConstructionTime, 421.6ms SatisfiabilityAnalysisTime, 5004.7ms InterpolantComputationTime, 487 NumberOfCodeBlocks, 461 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 671 ConstructedInterpolants, 0 QuantifiedInterpolants, 4430 SizeOfPredicates, 36 NumberOfNonLiveVariables, 642 ConjunctsInSsa, 74 ConjunctsInUnsatCore, 24 InterpolantComputations, 6 PerfectInterpolantSequences, 50/558 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME[ms]: 869, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 15, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 36, TOOLS_POST_TIME[ms]: 491, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 36, TOOLS_QUANTIFIERELIM_TIME[ms]: 471, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 205, FLUID_QUERY_TIME[ms]: 7, FLUID_QUERIES: 56, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 2, DOMAIN_JOIN_TIME[ms]: 163, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME[ms]: 101, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME[ms]: 5, DOMAIN_ISBOTTOM_APPLICATIONS: 15, DOMAIN_ISBOTTOM_TIME[ms]: 24, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 326, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 326, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 3, PATH_EXPR_TIME[ms]: 5, REGEX_TO_DAG_TIME[ms]: 4, DAG_COMPRESSION_TIME[ms]: 21, DAG_COMPRESSION_PROCESSED_NODES: 191, DAG_COMPRESSION_RETAINED_NODES: 49, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((((((((((((((((((((\valid["assert.h"] == 1 && unknown-#StackHeapBarrier-unknown < "assert.h") && unknown-#memory_int-unknown["0"]["0" + 1] == 0) && in <= 0) && 2 == unknown-#length-unknown["0"]) && buf == 0) && bufferlen == 2 + buflim) && 0 <= in) && 2 + buflim < inlen) && \valid[0] == 0) && \valid["0"] == 1) && #NULL == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["assert.h"] == 9) && 48 == unknown-#memory_int-unknown["0"]["0"]) && "assert.h" == 0) && "0" == 0) && buf < buflim + 1) && inlen <= 2147483647) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) || (((((((((((((((((((((((1 <= in && \valid["assert.h"] == 1) && unknown-#StackHeapBarrier-unknown < "assert.h") && unknown-#memory_int-unknown["0"]["0" + 1] == 0) && 1 <= cond) && \old(cond) == 1) && 2 == unknown-#length-unknown["0"]) && bufferlen == 2 + buflim) && cond <= 1) && in + 3 + buflim <= buf + inlen) && bufferlen <= 2147483647) && 1 <= buf) && \valid[0] == 0) && \valid["0"] == 1) && #NULL == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["assert.h"] == 9) && 48 == unknown-#memory_int-unknown["0"]["0"]) && "assert.h" == 0) && "0" == 0) && buf < buflim + 1) && inlen <= 2147483647) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((1 <= in && \valid["assert.h"] == 1) && unknown-#StackHeapBarrier-unknown < "assert.h") && unknown-#memory_int-unknown["0"]["0" + 1] == 0) && 1 <= cond) && 2 == unknown-#length-unknown["0"]) && bufferlen == 2 + buflim) && cond <= 1) && in + 3 + buflim <= buf + inlen) && buf < buflim) && bufferlen <= 2147483647) && 1 <= buf) && \valid[0] == 0) && \valid["0"] == 1) && #NULL == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["assert.h"] == 9) && \old(cond) == (if 0 <= buf then 1 else 0)) && 48 == unknown-#memory_int-unknown["0"]["0"]) && "assert.h" == 0) && "0" == 0) && inlen <= 2147483647) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) || (((((((((((((((((((((\valid["assert.h"] == 1 && unknown-#StackHeapBarrier-unknown < "assert.h") && unknown-#memory_int-unknown["0"]["0" + 1] == 0) && 2 == unknown-#length-unknown["0"]) && buf == 0) && bufferlen == 2 + buflim) && 3 + buflim <= inlen) && 1 == cond) && in == 0) && buf < buflim) && \valid[0] == 0) && \valid["0"] == 1) && #NULL == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["assert.h"] == 9) && \old(cond) == (if 0 <= buf then 1 else 0)) && 48 == unknown-#memory_int-unknown["0"]["0"]) && "assert.h" == 0) && "0" == 0) && inlen <= 2147483647) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (((((((((((((((((((((\valid["assert.h"] == 1 && unknown-#StackHeapBarrier-unknown < "assert.h") && 0 <= buf) && unknown-#memory_int-unknown["0"]["0" + 1] == 0) && \old(cond) == 1) && 2 == unknown-#length-unknown["0"]) && bufferlen == 2 + buflim) && 0 <= in) && 1 == cond) && in + 3 + buflim <= buf + inlen) && buf < buflim) && bufferlen <= 2147483647) && \valid[0] == 0) && \valid["0"] == 1) && #NULL == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["assert.h"] == 9) && 48 == unknown-#memory_int-unknown["0"]["0"]) && "assert.h" == 0) && "0" == 0) && inlen <= 2147483647) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (((buf == 0 && !(0 == cond)) && 2 <= bufferlen) || (((((((((((((((((((((((\valid["assert.h"] == 1 && unknown-#StackHeapBarrier-unknown < "assert.h") && 0 <= buf) && unknown-#memory_int-unknown["0"]["0" + 1] == 0) && 1 <= cond) && 2 == unknown-#length-unknown["0"]) && 0 <= buflim + 1) && 0 <= in) && buflim <= 2147483645) && buf <= 2) && bufferlen <= 2147483647) && \valid[0] == 0) && \valid["0"] == 1) && #NULL == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["assert.h"] == 9) && 2 + buf <= bufferlen) && 48 == unknown-#memory_int-unknown["0"]["0"]) && "assert.h" == 0) && 0 < inlen) && "0" == 0) && inlen <= 2147483647) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0)) || (((((((((((((((((((((\valid["assert.h"] == 1 && unknown-#StackHeapBarrier-unknown < "assert.h") && 0 <= buf) && unknown-#memory_int-unknown["0"]["0" + 1] == 0) && 2 == unknown-#length-unknown["0"]) && bufferlen == 2 + buflim) && 0 <= in) && 1 == cond) && bufferlen <= 2147483647) && \valid[0] == 0) && \valid["0"] == 1) && #NULL == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["assert.h"] == 9) && 48 == unknown-#memory_int-unknown["0"]["0"]) && "assert.h" == 0) && 0 < inlen) && "0" == 0) && buf < buflim + 1) && inlen <= 2147483647) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((buf + 1 <= bufferlen && 0 <= buf) && !(0 == cond)) && 2 <= bufferlen - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((1 <= in && \valid["assert.h"] == 1) && unknown-#StackHeapBarrier-unknown < "assert.h") && unknown-#memory_int-unknown["0"]["0" + 1] == 0) && 1 <= cond) && \old(cond) == 1) && 2 == unknown-#length-unknown["0"]) && in < inlen) && bufferlen == 2 + buflim) && cond <= 1) && bufferlen <= 2147483647) && 1 <= buf) && \valid[0] == 0) && \valid["0"] == 1) && #NULL == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["assert.h"] == 9) && 48 == unknown-#memory_int-unknown["0"]["0"]) && "assert.h" == 0) && "0" == 0) && buf < buflim + 1) && inlen <= 2147483647) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) || ((((((((((((((((((((((((((1 <= in && \valid["assert.h"] == 1) && unknown-#StackHeapBarrier-unknown < "assert.h") && unknown-#memory_int-unknown["0"]["0" + 1] == 0) && 1 <= cond) && \old(cond) == 1) && 2 == unknown-#length-unknown["0"]) && in < inlen) && 0 <= buflim + 1) && cond <= 1) && buflim <= 2147483645) && !(buflim + 1 == buf)) && buf <= 2) && bufferlen <= 2147483647) && 1 <= buf) && \valid[0] == 0) && \valid["0"] == 1) && #NULL == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["assert.h"] == 9) && 2 + buf <= bufferlen) && 48 == unknown-#memory_int-unknown["0"]["0"]) && "assert.h" == 0) && "0" == 0) && inlen <= 2147483647) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0)) || (((buf == 0 && in == 0) && !(0 == cond)) && 2 <= bufferlen) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (((((((((((((((((((((1 <= in && \old(cond) == cond) && \valid["assert.h"] == 1) && unknown-#StackHeapBarrier-unknown < "assert.h") && unknown-#memory_int-unknown["0"]["0" + 1] == 0) && \old(cond) == 1) && 2 == unknown-#length-unknown["0"]) && bufferlen == 2 + buflim) && in + 3 + buflim <= buf + inlen) && bufferlen <= 2147483647) && 1 <= buf) && \valid[0] == 0) && \valid["0"] == 1) && #NULL == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["assert.h"] == 9) && 48 == unknown-#memory_int-unknown["0"]["0"]) && "assert.h" == 0) && "0" == 0) && buf < buflim + 1) && inlen <= 2147483647) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-20 06:28:18,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66120f45-257a-4c7e-89f8-ccfc4dadca76/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...