./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.ufo.BOUNDED-10.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18d528c-5772-4d21-8252-87bf13e97822/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18d528c-5772-4d21-8252-87bf13e97822/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18d528c-5772-4d21-8252-87bf13e97822/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18d528c-5772-4d21-8252-87bf13e97822/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.ufo.BOUNDED-10.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18d528c-5772-4d21-8252-87bf13e97822/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18d528c-5772-4d21-8252-87bf13e97822/bin/utaipan-aC7eJsxGYH --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 d5921f81b571539aa354f07d7b74f356c21b025c1bc5bc3995bc2412fa482a7c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:13:26,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:13:26,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:13:26,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:13:26,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:13:26,282 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:13:26,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:13:26,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:13:26,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:13:26,299 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:13:26,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:13:26,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:13:26,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:13:26,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:13:26,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:13:26,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:13:26,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:13:26,322 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:13:26,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:13:26,332 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:13:26,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:13:26,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:13:26,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:13:26,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:13:26,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:13:26,351 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:13:26,351 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:13:26,354 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:13:26,355 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:13:26,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:13:26,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:13:26,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:13:26,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:13:26,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:13:26,364 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:13:26,364 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:13:26,365 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:13:26,365 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:13:26,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:13:26,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:13:26,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:13:26,369 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18d528c-5772-4d21-8252-87bf13e97822/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:13:26,419 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:13:26,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:13:26,422 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:13:26,422 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:13:26,423 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:13:26,423 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:13:26,423 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:13:26,423 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:13:26,424 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:13:26,424 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:13:26,425 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:13:26,425 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:13:26,426 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:13:26,426 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:13:26,426 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:13:26,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:13:26,427 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:13:26,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:13:26,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:13:26,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:13:26,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:13:26,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:13:26,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:13:26,429 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:13:26,429 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:13:26,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:13:26,430 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:13:26,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:13:26,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:13:26,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:13:26,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:13:26,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:13:26,433 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:13:26,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:13:26,434 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:13:26,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:13:26,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:13:26,435 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:13:26,435 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:13:26,435 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_b18d528c-5772-4d21-8252-87bf13e97822/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18d528c-5772-4d21-8252-87bf13e97822/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d5921f81b571539aa354f07d7b74f356c21b025c1bc5bc3995bc2412fa482a7c [2021-11-03 04:13:26,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:13:26,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:13:26,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:13:26,749 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:13:26,750 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:13:26,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18d528c-5772-4d21-8252-87bf13e97822/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.ufo.BOUNDED-10.pals.c [2021-11-03 04:13:26,830 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18d528c-5772-4d21-8252-87bf13e97822/bin/utaipan-aC7eJsxGYH/data/baa711343/e3ceabccaea84f0bafcd75908bb50c56/FLAG417499efd [2021-11-03 04:13:27,532 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:13:27,532 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18d528c-5772-4d21-8252-87bf13e97822/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.ufo.BOUNDED-10.pals.c [2021-11-03 04:13:27,568 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18d528c-5772-4d21-8252-87bf13e97822/bin/utaipan-aC7eJsxGYH/data/baa711343/e3ceabccaea84f0bafcd75908bb50c56/FLAG417499efd [2021-11-03 04:13:27,685 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18d528c-5772-4d21-8252-87bf13e97822/bin/utaipan-aC7eJsxGYH/data/baa711343/e3ceabccaea84f0bafcd75908bb50c56 [2021-11-03 04:13:27,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:13:27,693 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:13:27,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:13:27,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:13:27,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:13:27,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:13:27" (1/1) ... [2021-11-03 04:13:27,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dc30894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:27, skipping insertion in model container [2021-11-03 04:13:27,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:13:27" (1/1) ... [2021-11-03 04:13:27,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:13:27,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:13:28,406 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_b18d528c-5772-4d21-8252-87bf13e97822/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.ufo.BOUNDED-10.pals.c[60915,60928] [2021-11-03 04:13:28,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:13:28,430 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:13:28,563 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_b18d528c-5772-4d21-8252-87bf13e97822/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.ufo.BOUNDED-10.pals.c[60915,60928] [2021-11-03 04:13:28,564 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:13:28,584 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:13:28,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:28 WrapperNode [2021-11-03 04:13:28,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:13:28,602 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:13:28,602 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:13:28,603 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:13:28,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:28" (1/1) ... [2021-11-03 04:13:28,642 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:28" (1/1) ... [2021-11-03 04:13:28,753 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:13:28,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:13:28,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:13:28,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:13:28,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:28" (1/1) ... [2021-11-03 04:13:28,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:28" (1/1) ... [2021-11-03 04:13:28,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:28" (1/1) ... [2021-11-03 04:13:28,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:28" (1/1) ... [2021-11-03 04:13:28,827 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:28" (1/1) ... [2021-11-03 04:13:28,895 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:28" (1/1) ... [2021-11-03 04:13:28,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:28" (1/1) ... [2021-11-03 04:13:28,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:13:28,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:13:28,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:13:28,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:13:28,918 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:28" (1/1) ... [2021-11-03 04:13:28,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:13:28,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18d528c-5772-4d21-8252-87bf13e97822/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:13:28,973 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18d528c-5772-4d21-8252-87bf13e97822/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:13:29,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18d528c-5772-4d21-8252-87bf13e97822/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:13:29,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 04:13:29,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:13:29,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:13:29,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:13:37,493 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:13:37,493 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2021-11-03 04:13:37,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:13:37 BoogieIcfgContainer [2021-11-03 04:13:37,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:13:37,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:13:37,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:13:37,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:13:37,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:13:27" (1/3) ... [2021-11-03 04:13:37,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@236e00b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:13:37, skipping insertion in model container [2021-11-03 04:13:37,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:28" (2/3) ... [2021-11-03 04:13:37,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@236e00b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:13:37, skipping insertion in model container [2021-11-03 04:13:37,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:13:37" (3/3) ... [2021-11-03 04:13:37,511 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.ufo.BOUNDED-10.pals.c [2021-11-03 04:13:37,518 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:13:37,518 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:13:37,587 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:13:37,595 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:13:37,595 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 04:13:37,629 INFO L276 IsEmpty]: Start isEmpty. Operand has 441 states, 439 states have (on average 1.7175398633257404) internal successors, (754), 440 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:37,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-03 04:13:37,652 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:37,653 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:13:37,654 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:13:37,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:37,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1071166716, now seen corresponding path program 1 times [2021-11-03 04:13:37,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:13:37,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743655137] [2021-11-03 04:13:37,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:37,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:13:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:39,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:13:39,131 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:13:39,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743655137] [2021-11-03 04:13:39,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743655137] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:39,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:39,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:13:39,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936649458] [2021-11-03 04:13:39,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:13:39,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:13:39,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:13:39,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:13:39,162 INFO L87 Difference]: Start difference. First operand has 441 states, 439 states have (on average 1.7175398633257404) internal successors, (754), 440 states have internal predecessors, (754), 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 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:39,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:39,418 INFO L93 Difference]: Finished difference Result 483 states and 822 transitions. [2021-11-03 04:13:39,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:13:39,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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 126 [2021-11-03 04:13:39,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:39,439 INFO L225 Difference]: With dead ends: 483 [2021-11-03 04:13:39,439 INFO L226 Difference]: Without dead ends: 460 [2021-11-03 04:13:39,443 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:13:39,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-03 04:13:39,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 450. [2021-11-03 04:13:39,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.712694877505568) internal successors, (769), 449 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:39,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 769 transitions. [2021-11-03 04:13:39,525 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 769 transitions. Word has length 126 [2021-11-03 04:13:39,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:39,527 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 769 transitions. [2021-11-03 04:13:39,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:39,527 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 769 transitions. [2021-11-03 04:13:39,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-03 04:13:39,532 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:39,537 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:13:39,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 04:13:39,537 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:13:39,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:39,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1079885223, now seen corresponding path program 1 times [2021-11-03 04:13:39,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:13:39,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144349377] [2021-11-03 04:13:39,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:39,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:13:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:40,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:13:40,063 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:13:40,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144349377] [2021-11-03 04:13:40,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144349377] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:40,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:40,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:13:40,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756387859] [2021-11-03 04:13:40,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:13:40,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:13:40,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:13:40,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:13:40,068 INFO L87 Difference]: Start difference. First operand 450 states and 769 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:40,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:40,207 INFO L93 Difference]: Finished difference Result 483 states and 819 transitions. [2021-11-03 04:13:40,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:13:40,208 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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 127 [2021-11-03 04:13:40,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:40,214 INFO L225 Difference]: With dead ends: 483 [2021-11-03 04:13:40,214 INFO L226 Difference]: Without dead ends: 462 [2021-11-03 04:13:40,215 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:13:40,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-03 04:13:40,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2021-11-03 04:13:40,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.710467706013363) internal successors, (768), 449 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:40,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 768 transitions. [2021-11-03 04:13:40,250 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 768 transitions. Word has length 127 [2021-11-03 04:13:40,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:40,251 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 768 transitions. [2021-11-03 04:13:40,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:40,252 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 768 transitions. [2021-11-03 04:13:40,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-03 04:13:40,256 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:40,256 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:13:40,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 04:13:40,257 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:13:40,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:40,258 INFO L85 PathProgramCache]: Analyzing trace with hash -951529651, now seen corresponding path program 1 times [2021-11-03 04:13:40,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:13:40,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085505967] [2021-11-03 04:13:40,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:40,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:13:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:13:40,722 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:13:40,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085505967] [2021-11-03 04:13:40,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085505967] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:40,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:40,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:13:40,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77667361] [2021-11-03 04:13:40,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:13:40,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:13:40,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:13:40,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:13:40,727 INFO L87 Difference]: Start difference. First operand 450 states and 768 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:40,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:40,869 INFO L93 Difference]: Finished difference Result 483 states and 818 transitions. [2021-11-03 04:13:40,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:13:40,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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 128 [2021-11-03 04:13:40,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:40,875 INFO L225 Difference]: With dead ends: 483 [2021-11-03 04:13:40,875 INFO L226 Difference]: Without dead ends: 462 [2021-11-03 04:13:40,876 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:13:40,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-03 04:13:40,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2021-11-03 04:13:40,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7082405345211582) internal successors, (767), 449 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:40,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 767 transitions. [2021-11-03 04:13:40,901 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 767 transitions. Word has length 128 [2021-11-03 04:13:40,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:40,902 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 767 transitions. [2021-11-03 04:13:40,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:40,902 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 767 transitions. [2021-11-03 04:13:40,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-03 04:13:40,905 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:40,905 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:13:40,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 04:13:40,906 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:13:40,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:40,907 INFO L85 PathProgramCache]: Analyzing trace with hash 504570448, now seen corresponding path program 1 times [2021-11-03 04:13:40,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:13:40,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645493126] [2021-11-03 04:13:40,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:40,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:13:41,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:41,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:13:41,295 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:13:41,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645493126] [2021-11-03 04:13:41,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645493126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:41,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:41,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:13:41,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884759921] [2021-11-03 04:13:41,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:13:41,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:13:41,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:13:41,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:13:41,299 INFO L87 Difference]: Start difference. First operand 450 states and 767 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:41,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:41,437 INFO L93 Difference]: Finished difference Result 483 states and 817 transitions. [2021-11-03 04:13:41,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:13:41,438 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 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 129 [2021-11-03 04:13:41,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:41,443 INFO L225 Difference]: With dead ends: 483 [2021-11-03 04:13:41,443 INFO L226 Difference]: Without dead ends: 462 [2021-11-03 04:13:41,444 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:13:41,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-03 04:13:41,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2021-11-03 04:13:41,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7060133630289531) internal successors, (766), 449 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:41,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 766 transitions. [2021-11-03 04:13:41,463 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 766 transitions. Word has length 129 [2021-11-03 04:13:41,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:41,464 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 766 transitions. [2021-11-03 04:13:41,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:41,465 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 766 transitions. [2021-11-03 04:13:41,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-03 04:13:41,470 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:41,471 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:13:41,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 04:13:41,471 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:13:41,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:41,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1595514986, now seen corresponding path program 1 times [2021-11-03 04:13:41,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:13:41,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045643922] [2021-11-03 04:13:41,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:41,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:13:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:13:41,868 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:13:41,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045643922] [2021-11-03 04:13:41,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045643922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:41,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:41,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:13:41,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570971676] [2021-11-03 04:13:41,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:13:41,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:13:41,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:13:41,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:13:41,874 INFO L87 Difference]: Start difference. First operand 450 states and 766 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:42,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:42,036 INFO L93 Difference]: Finished difference Result 483 states and 816 transitions. [2021-11-03 04:13:42,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:13:42,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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 130 [2021-11-03 04:13:42,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:42,042 INFO L225 Difference]: With dead ends: 483 [2021-11-03 04:13:42,042 INFO L226 Difference]: Without dead ends: 462 [2021-11-03 04:13:42,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:13:42,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-03 04:13:42,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2021-11-03 04:13:42,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7037861915367483) internal successors, (765), 449 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:42,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 765 transitions. [2021-11-03 04:13:42,064 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 765 transitions. Word has length 130 [2021-11-03 04:13:42,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:42,064 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 765 transitions. [2021-11-03 04:13:42,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:42,065 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 765 transitions. [2021-11-03 04:13:42,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-03 04:13:42,068 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:42,068 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:13:42,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 04:13:42,069 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:13:42,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:42,070 INFO L85 PathProgramCache]: Analyzing trace with hash 2026765049, now seen corresponding path program 1 times [2021-11-03 04:13:42,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:13:42,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582539964] [2021-11-03 04:13:42,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:42,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:13:42,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:13:42,478 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:13:42,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582539964] [2021-11-03 04:13:42,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582539964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:42,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:42,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:13:42,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339682949] [2021-11-03 04:13:42,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:13:42,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:13:42,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:13:42,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:13:42,492 INFO L87 Difference]: Start difference. First operand 450 states and 765 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:42,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:42,700 INFO L93 Difference]: Finished difference Result 483 states and 815 transitions. [2021-11-03 04:13:42,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:13:42,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 131 [2021-11-03 04:13:42,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:42,705 INFO L225 Difference]: With dead ends: 483 [2021-11-03 04:13:42,705 INFO L226 Difference]: Without dead ends: 462 [2021-11-03 04:13:42,706 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:13:42,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-03 04:13:42,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2021-11-03 04:13:42,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7015590200445434) internal successors, (764), 449 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:42,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 764 transitions. [2021-11-03 04:13:42,727 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 764 transitions. Word has length 131 [2021-11-03 04:13:42,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:42,728 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 764 transitions. [2021-11-03 04:13:42,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:42,728 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 764 transitions. [2021-11-03 04:13:42,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-03 04:13:42,731 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:42,731 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:13:42,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 04:13:42,732 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:13:42,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:42,732 INFO L85 PathProgramCache]: Analyzing trace with hash 622777281, now seen corresponding path program 1 times [2021-11-03 04:13:42,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:13:42,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301605406] [2021-11-03 04:13:42,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:42,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:13:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:13:44,462 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:13:44,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301605406] [2021-11-03 04:13:44,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301605406] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:44,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:44,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:13:44,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720499277] [2021-11-03 04:13:44,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:13:44,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:13:44,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:13:44,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:13:44,465 INFO L87 Difference]: Start difference. First operand 450 states and 764 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:44,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:44,608 INFO L93 Difference]: Finished difference Result 481 states and 811 transitions. [2021-11-03 04:13:44,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:13:44,609 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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 133 [2021-11-03 04:13:44,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:44,612 INFO L225 Difference]: With dead ends: 481 [2021-11-03 04:13:44,613 INFO L226 Difference]: Without dead ends: 460 [2021-11-03 04:13:44,615 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:13:44,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-03 04:13:44,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 451. [2021-11-03 04:13:44,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.7) internal successors, (765), 450 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:44,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 765 transitions. [2021-11-03 04:13:44,633 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 765 transitions. Word has length 133 [2021-11-03 04:13:44,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:44,633 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 765 transitions. [2021-11-03 04:13:44,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:44,634 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 765 transitions. [2021-11-03 04:13:44,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-03 04:13:44,636 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:44,637 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:13:44,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 04:13:44,637 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:13:44,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:44,638 INFO L85 PathProgramCache]: Analyzing trace with hash 2038152525, now seen corresponding path program 1 times [2021-11-03 04:13:44,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:13:44,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216093747] [2021-11-03 04:13:44,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:44,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:13:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:44,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:13:44,835 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:13:44,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216093747] [2021-11-03 04:13:44,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216093747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:44,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:44,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:13:44,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517216584] [2021-11-03 04:13:44,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:13:44,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:13:44,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:13:44,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:13:44,838 INFO L87 Difference]: Start difference. First operand 451 states and 765 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:44,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:44,949 INFO L93 Difference]: Finished difference Result 482 states and 812 transitions. [2021-11-03 04:13:44,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:13:44,950 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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 134 [2021-11-03 04:13:44,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:44,954 INFO L225 Difference]: With dead ends: 482 [2021-11-03 04:13:44,954 INFO L226 Difference]: Without dead ends: 461 [2021-11-03 04:13:44,955 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:13:44,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-03 04:13:44,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 453. [2021-11-03 04:13:44,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.6946902654867257) internal successors, (766), 452 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 766 transitions. [2021-11-03 04:13:44,970 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 766 transitions. Word has length 134 [2021-11-03 04:13:44,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:44,971 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 766 transitions. [2021-11-03 04:13:44,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:44,972 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 766 transitions. [2021-11-03 04:13:44,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-03 04:13:44,974 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:44,974 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:13:44,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 04:13:44,975 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:13:44,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:44,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1668575059, now seen corresponding path program 1 times [2021-11-03 04:13:44,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:13:44,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948761841] [2021-11-03 04:13:44,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:44,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:13:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:45,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:13:45,470 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:13:45,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948761841] [2021-11-03 04:13:45,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948761841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:45,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:45,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:13:45,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727672304] [2021-11-03 04:13:45,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:13:45,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:13:45,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:13:45,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:13:45,473 INFO L87 Difference]: Start difference. First operand 453 states and 766 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:45,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:45,614 INFO L93 Difference]: Finished difference Result 482 states and 809 transitions. [2021-11-03 04:13:45,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:13:45,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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 136 [2021-11-03 04:13:45,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:45,619 INFO L225 Difference]: With dead ends: 482 [2021-11-03 04:13:45,620 INFO L226 Difference]: Without dead ends: 461 [2021-11-03 04:13:45,620 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:13:45,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-03 04:13:45,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 454. [2021-11-03 04:13:45,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.6931567328918322) internal successors, (767), 453 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:45,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 767 transitions. [2021-11-03 04:13:45,639 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 767 transitions. Word has length 136 [2021-11-03 04:13:45,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:45,639 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 767 transitions. [2021-11-03 04:13:45,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:45,640 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 767 transitions. [2021-11-03 04:13:45,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-03 04:13:45,642 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:45,643 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:13:45,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 04:13:45,643 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:13:45,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:45,644 INFO L85 PathProgramCache]: Analyzing trace with hash 177061634, now seen corresponding path program 1 times [2021-11-03 04:13:45,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:13:45,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296053473] [2021-11-03 04:13:45,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:45,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:13:45,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:46,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:13:46,007 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:13:46,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296053473] [2021-11-03 04:13:46,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296053473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:46,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:46,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 04:13:46,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251054915] [2021-11-03 04:13:46,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:13:46,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:13:46,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:13:46,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:13:46,011 INFO L87 Difference]: Start difference. First operand 454 states and 767 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:46,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:46,266 INFO L93 Difference]: Finished difference Result 505 states and 847 transitions. [2021-11-03 04:13:46,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:13:46,268 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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 137 [2021-11-03 04:13:46,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:46,272 INFO L225 Difference]: With dead ends: 505 [2021-11-03 04:13:46,272 INFO L226 Difference]: Without dead ends: 484 [2021-11-03 04:13:46,273 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:13:46,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-03 04:13:46,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 457. [2021-11-03 04:13:46,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.6864035087719298) internal successors, (769), 456 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:46,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 769 transitions. [2021-11-03 04:13:46,295 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 769 transitions. Word has length 137 [2021-11-03 04:13:46,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:46,296 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 769 transitions. [2021-11-03 04:13:46,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:46,296 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 769 transitions. [2021-11-03 04:13:46,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-03 04:13:46,299 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:46,299 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:13:46,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 04:13:46,300 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:13:46,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:46,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1964495543, now seen corresponding path program 1 times [2021-11-03 04:13:46,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:13:46,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754929288] [2021-11-03 04:13:46,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:46,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:13:46,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:47,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:13:47,512 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:13:47,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754929288] [2021-11-03 04:13:47,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754929288] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:13:47,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644517996] [2021-11-03 04:13:47,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:47,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:13:47,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18d528c-5772-4d21-8252-87bf13e97822/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:13:47,515 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18d528c-5772-4d21-8252-87bf13e97822/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:13:47,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18d528c-5772-4d21-8252-87bf13e97822/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 04:13:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:48,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-03 04:13:48,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:17:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:17:50,812 INFO L328 TraceCheckSpWp]: Computing backward predicates...