./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.3.ufo.BOUNDED-8.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_d197cae5-27cf-4a33-9829-7df123a43e1a/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d197cae5-27cf-4a33-9829-7df123a43e1a/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_d197cae5-27cf-4a33-9829-7df123a43e1a/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d197cae5-27cf-4a33-9829-7df123a43e1a/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d197cae5-27cf-4a33-9829-7df123a43e1a/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_d197cae5-27cf-4a33-9829-7df123a43e1a/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 1936862b5856707e80b1aa2b38aa8e033b3615fe51a16f40b8e11843db1147ca --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:10:22,480 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:10:22,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:10:22,528 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:10:22,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:10:22,535 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:10:22,537 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:10:22,542 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:10:22,545 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:10:22,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:10:22,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:10:22,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:10:22,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:10:22,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:10:22,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:10:22,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:10:22,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:10:22,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:10:22,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:10:22,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:10:22,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:10:22,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:10:22,599 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:10:22,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:10:22,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:10:22,611 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:10:22,612 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:10:22,614 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:10:22,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:10:22,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:10:22,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:10:22,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:10:22,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:10:22,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:10:22,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:10:22,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:10:22,625 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:10:22,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:10:22,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:10:22,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:10:22,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:10:22,629 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d197cae5-27cf-4a33-9829-7df123a43e1a/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:10:22,686 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:10:22,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:10:22,690 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:10:22,690 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:10:22,691 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:10:22,691 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:10:22,691 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:10:22,691 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:10:22,692 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:10:22,692 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:10:22,693 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:10:22,694 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:10:22,694 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:10:22,694 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:10:22,694 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:10:22,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:10:22,696 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:10:22,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:10:22,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:10:22,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:10:22,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:10:22,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:10:22,697 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:10:22,698 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:10:22,698 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:10:22,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:10:22,698 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:10:22,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:10:22,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:10:22,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:10:22,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:10:22,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:10:22,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:10:22,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:10:22,702 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:10:22,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:10:22,703 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:10:22,703 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:10:22,704 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:10:22,704 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_d197cae5-27cf-4a33-9829-7df123a43e1a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d197cae5-27cf-4a33-9829-7df123a43e1a/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1936862b5856707e80b1aa2b38aa8e033b3615fe51a16f40b8e11843db1147ca [2021-11-03 05:10:23,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:10:23,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:10:23,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:10:23,164 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:10:23,165 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:10:23,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d197cae5-27cf-4a33-9829-7df123a43e1a/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c [2021-11-03 05:10:23,243 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d197cae5-27cf-4a33-9829-7df123a43e1a/bin/utaipan-aC7eJsxGYH/data/2f05453ac/2f63897d61f248f5977165132004697b/FLAGd9cc3ba1e [2021-11-03 05:10:23,818 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:10:23,819 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d197cae5-27cf-4a33-9829-7df123a43e1a/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c [2021-11-03 05:10:23,843 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d197cae5-27cf-4a33-9829-7df123a43e1a/bin/utaipan-aC7eJsxGYH/data/2f05453ac/2f63897d61f248f5977165132004697b/FLAGd9cc3ba1e [2021-11-03 05:10:24,109 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d197cae5-27cf-4a33-9829-7df123a43e1a/bin/utaipan-aC7eJsxGYH/data/2f05453ac/2f63897d61f248f5977165132004697b [2021-11-03 05:10:24,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:10:24,114 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:10:24,130 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:10:24,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:10:24,133 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:10:24,134 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:10:24" (1/1) ... [2021-11-03 05:10:24,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f3ca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:24, skipping insertion in model container [2021-11-03 05:10:24,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:10:24" (1/1) ... [2021-11-03 05:10:24,144 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:10:24,208 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:10:24,646 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_d197cae5-27cf-4a33-9829-7df123a43e1a/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c[30998,31011] [2021-11-03 05:10:24,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:10:24,661 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:10:24,815 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_d197cae5-27cf-4a33-9829-7df123a43e1a/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c[30998,31011] [2021-11-03 05:10:24,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:10:24,846 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:10:24,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:24 WrapperNode [2021-11-03 05:10:24,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:10:24,848 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:10:24,848 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:10:24,848 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:10:24,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:24" (1/1) ... [2021-11-03 05:10:24,877 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:24" (1/1) ... [2021-11-03 05:10:24,958 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:10:24,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:10:24,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:10:24,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:10:24,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:24" (1/1) ... [2021-11-03 05:10:24,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:24" (1/1) ... [2021-11-03 05:10:24,987 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:24" (1/1) ... [2021-11-03 05:10:24,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:24" (1/1) ... [2021-11-03 05:10:25,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:24" (1/1) ... [2021-11-03 05:10:25,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:24" (1/1) ... [2021-11-03 05:10:25,050 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:24" (1/1) ... [2021-11-03 05:10:25,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:10:25,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:10:25,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:10:25,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:10:25,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:24" (1/1) ... [2021-11-03 05:10:25,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:10:25,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d197cae5-27cf-4a33-9829-7df123a43e1a/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:10:25,107 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d197cae5-27cf-4a33-9829-7df123a43e1a/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:10:25,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d197cae5-27cf-4a33-9829-7df123a43e1a/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:10:25,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:10:25,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:10:25,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:10:25,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:10:30,833 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:10:30,834 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-11-03 05:10:30,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:10:30 BoogieIcfgContainer [2021-11-03 05:10:30,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:10:30,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:10:30,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:10:30,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:10:30,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:10:24" (1/3) ... [2021-11-03 05:10:30,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154c522a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:10:30, skipping insertion in model container [2021-11-03 05:10:30,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:24" (2/3) ... [2021-11-03 05:10:30,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154c522a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:10:30, skipping insertion in model container [2021-11-03 05:10:30,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:10:30" (3/3) ... [2021-11-03 05:10:30,850 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c [2021-11-03 05:10:30,865 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:10:30,865 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:10:30,936 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:10:30,947 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 05:10:30,947 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:10:30,975 INFO L276 IsEmpty]: Start isEmpty. Operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 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 05:10:30,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 05:10:30,986 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:10:30,987 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] [2021-11-03 05:10:30,988 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:10:30,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:10:30,994 INFO L85 PathProgramCache]: Analyzing trace with hash 2052787534, now seen corresponding path program 1 times [2021-11-03 05:10:31,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:10:31,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232506578] [2021-11-03 05:10:31,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:31,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:10:31,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:32,036 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 05:10:32,036 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:10:32,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232506578] [2021-11-03 05:10:32,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232506578] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:10:32,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:10:32,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:10:32,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001456464] [2021-11-03 05:10:32,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:10:32,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:10:32,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:10:32,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:10:32,064 INFO L87 Difference]: Start difference. First operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 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 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:32,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:10:32,294 INFO L93 Difference]: Finished difference Result 180 states and 288 transitions. [2021-11-03 05:10:32,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:10:32,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-03 05:10:32,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:10:32,310 INFO L225 Difference]: With dead ends: 180 [2021-11-03 05:10:32,310 INFO L226 Difference]: Without dead ends: 158 [2021-11-03 05:10:32,314 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 05:10:32,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-03 05:10:32,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2021-11-03 05:10:32,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6122448979591837) internal successors, (237), 147 states have internal predecessors, (237), 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 05:10:32,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 237 transitions. [2021-11-03 05:10:32,368 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 237 transitions. Word has length 54 [2021-11-03 05:10:32,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:10:32,369 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 237 transitions. [2021-11-03 05:10:32,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:32,370 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 237 transitions. [2021-11-03 05:10:32,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-03 05:10:32,373 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:10:32,374 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] [2021-11-03 05:10:32,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 05:10:32,374 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:10:32,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:10:32,375 INFO L85 PathProgramCache]: Analyzing trace with hash -856270581, now seen corresponding path program 1 times [2021-11-03 05:10:32,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:10:32,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696384229] [2021-11-03 05:10:32,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:32,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:10:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:32,668 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 05:10:32,669 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:10:32,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696384229] [2021-11-03 05:10:32,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696384229] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:10:32,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:10:32,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:10:32,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672058767] [2021-11-03 05:10:32,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:10:32,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:10:32,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:10:32,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:10:32,676 INFO L87 Difference]: Start difference. First operand 148 states and 237 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:32,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:10:32,797 INFO L93 Difference]: Finished difference Result 180 states and 285 transitions. [2021-11-03 05:10:32,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:10:32,798 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-03 05:10:32,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:10:32,801 INFO L225 Difference]: With dead ends: 180 [2021-11-03 05:10:32,801 INFO L226 Difference]: Without dead ends: 160 [2021-11-03 05:10:32,802 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 05:10:32,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-03 05:10:32,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2021-11-03 05:10:32,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6054421768707483) internal successors, (236), 147 states have internal predecessors, (236), 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 05:10:32,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 236 transitions. [2021-11-03 05:10:32,833 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 236 transitions. Word has length 55 [2021-11-03 05:10:32,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:10:32,835 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 236 transitions. [2021-11-03 05:10:32,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:32,836 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 236 transitions. [2021-11-03 05:10:32,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-03 05:10:32,846 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:10:32,847 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] [2021-11-03 05:10:32,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 05:10:32,848 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:10:32,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:10:32,856 INFO L85 PathProgramCache]: Analyzing trace with hash -837307177, now seen corresponding path program 1 times [2021-11-03 05:10:32,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:10:32,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414407776] [2021-11-03 05:10:32,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:32,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:10:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:33,150 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 05:10:33,151 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:10:33,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414407776] [2021-11-03 05:10:33,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414407776] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:10:33,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:10:33,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:10:33,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492448389] [2021-11-03 05:10:33,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:10:33,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:10:33,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:10:33,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:10:33,166 INFO L87 Difference]: Start difference. First operand 148 states and 236 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:33,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:10:33,278 INFO L93 Difference]: Finished difference Result 180 states and 284 transitions. [2021-11-03 05:10:33,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:10:33,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-03 05:10:33,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:10:33,281 INFO L225 Difference]: With dead ends: 180 [2021-11-03 05:10:33,281 INFO L226 Difference]: Without dead ends: 160 [2021-11-03 05:10:33,282 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 05:10:33,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-03 05:10:33,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2021-11-03 05:10:33,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.598639455782313) internal successors, (235), 147 states have internal predecessors, (235), 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 05:10:33,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 235 transitions. [2021-11-03 05:10:33,294 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 235 transitions. Word has length 56 [2021-11-03 05:10:33,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:10:33,295 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 235 transitions. [2021-11-03 05:10:33,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:33,296 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 235 transitions. [2021-11-03 05:10:33,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 05:10:33,298 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:10:33,299 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] [2021-11-03 05:10:33,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 05:10:33,299 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:10:33,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:10:33,300 INFO L85 PathProgramCache]: Analyzing trace with hash -243989900, now seen corresponding path program 1 times [2021-11-03 05:10:33,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:10:33,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117187590] [2021-11-03 05:10:33,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:33,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:10:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:33,604 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 05:10:33,605 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:10:33,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117187590] [2021-11-03 05:10:33,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117187590] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:10:33,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:10:33,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:10:33,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463397758] [2021-11-03 05:10:33,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:10:33,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:10:33,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:10:33,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:10:33,615 INFO L87 Difference]: Start difference. First operand 148 states and 235 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 05:10:33,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:10:33,725 INFO L93 Difference]: Finished difference Result 180 states and 283 transitions. [2021-11-03 05:10:33,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:10:33,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 57 [2021-11-03 05:10:33,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:10:33,727 INFO L225 Difference]: With dead ends: 180 [2021-11-03 05:10:33,728 INFO L226 Difference]: Without dead ends: 160 [2021-11-03 05:10:33,728 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 05:10:33,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-03 05:10:33,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2021-11-03 05:10:33,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5918367346938775) internal successors, (234), 147 states have internal predecessors, (234), 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 05:10:33,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 234 transitions. [2021-11-03 05:10:33,748 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 234 transitions. Word has length 57 [2021-11-03 05:10:33,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:10:33,751 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 234 transitions. [2021-11-03 05:10:33,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 05:10:33,751 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 234 transitions. [2021-11-03 05:10:33,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 05:10:33,757 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:10:33,757 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] [2021-11-03 05:10:33,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 05:10:33,758 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:10:33,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:10:33,761 INFO L85 PathProgramCache]: Analyzing trace with hash 974428256, now seen corresponding path program 1 times [2021-11-03 05:10:33,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:10:33,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948605443] [2021-11-03 05:10:33,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:33,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:10:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:34,008 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 05:10:34,009 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:10:34,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948605443] [2021-11-03 05:10:34,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948605443] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:10:34,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:10:34,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:10:34,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402549486] [2021-11-03 05:10:34,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:10:34,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:10:34,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:10:34,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:10:34,014 INFO L87 Difference]: Start difference. First operand 148 states and 234 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 05:10:34,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:10:34,118 INFO L93 Difference]: Finished difference Result 180 states and 282 transitions. [2021-11-03 05:10:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:10:34,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 58 [2021-11-03 05:10:34,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:10:34,121 INFO L225 Difference]: With dead ends: 180 [2021-11-03 05:10:34,121 INFO L226 Difference]: Without dead ends: 160 [2021-11-03 05:10:34,122 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 05:10:34,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-03 05:10:34,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2021-11-03 05:10:34,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5850340136054422) internal successors, (233), 147 states have internal predecessors, (233), 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 05:10:34,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 233 transitions. [2021-11-03 05:10:34,135 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 233 transitions. Word has length 58 [2021-11-03 05:10:34,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:10:34,136 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 233 transitions. [2021-11-03 05:10:34,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 05:10:34,137 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 233 transitions. [2021-11-03 05:10:34,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 05:10:34,138 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:10:34,138 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] [2021-11-03 05:10:34,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 05:10:34,139 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:10:34,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:10:34,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1353694200, now seen corresponding path program 1 times [2021-11-03 05:10:34,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:10:34,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374347622] [2021-11-03 05:10:34,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:34,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:10:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:34,604 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 05:10:34,607 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:10:34,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374347622] [2021-11-03 05:10:34,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374347622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:10:34,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:10:34,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:10:34,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718223512] [2021-11-03 05:10:34,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:10:34,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:10:34,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:10:34,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:10:34,614 INFO L87 Difference]: Start difference. First operand 148 states and 233 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:34,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:10:34,738 INFO L93 Difference]: Finished difference Result 178 states and 278 transitions. [2021-11-03 05:10:34,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:10:34,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 05:10:34,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:10:34,740 INFO L225 Difference]: With dead ends: 178 [2021-11-03 05:10:34,741 INFO L226 Difference]: Without dead ends: 158 [2021-11-03 05:10:34,741 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 05:10:34,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-03 05:10:34,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2021-11-03 05:10:34,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.5810810810810811) internal successors, (234), 148 states have internal predecessors, (234), 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 05:10:34,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 234 transitions. [2021-11-03 05:10:34,758 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 234 transitions. Word has length 60 [2021-11-03 05:10:34,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:10:34,758 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 234 transitions. [2021-11-03 05:10:34,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:34,759 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 234 transitions. [2021-11-03 05:10:34,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 05:10:34,761 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:10:34,761 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] [2021-11-03 05:10:34,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 05:10:34,762 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:10:34,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:10:34,763 INFO L85 PathProgramCache]: Analyzing trace with hash 897137259, now seen corresponding path program 1 times [2021-11-03 05:10:34,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:10:34,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849269725] [2021-11-03 05:10:34,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:34,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:10:34,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:34,932 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 05:10:34,933 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:10:34,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849269725] [2021-11-03 05:10:34,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849269725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:10:34,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:10:34,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:10:34,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751229652] [2021-11-03 05:10:34,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:10:34,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:10:34,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:10:34,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:10:34,937 INFO L87 Difference]: Start difference. First operand 149 states and 234 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 05:10:35,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:10:35,027 INFO L93 Difference]: Finished difference Result 179 states and 279 transitions. [2021-11-03 05:10:35,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:10:35,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 61 [2021-11-03 05:10:35,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:10:35,029 INFO L225 Difference]: With dead ends: 179 [2021-11-03 05:10:35,029 INFO L226 Difference]: Without dead ends: 159 [2021-11-03 05:10:35,030 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 05:10:35,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-03 05:10:35,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 151. [2021-11-03 05:10:35,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.5666666666666667) internal successors, (235), 150 states have internal predecessors, (235), 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 05:10:35,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 235 transitions. [2021-11-03 05:10:35,038 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 235 transitions. Word has length 61 [2021-11-03 05:10:35,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:10:35,039 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 235 transitions. [2021-11-03 05:10:35,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 05:10:35,040 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 235 transitions. [2021-11-03 05:10:35,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-03 05:10:35,041 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:10:35,041 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] [2021-11-03 05:10:35,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 05:10:35,042 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:10:35,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:10:35,043 INFO L85 PathProgramCache]: Analyzing trace with hash 371436945, now seen corresponding path program 1 times [2021-11-03 05:10:35,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:10:35,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885356683] [2021-11-03 05:10:35,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:35,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:10:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:35,793 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 05:10:35,793 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:10:35,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885356683] [2021-11-03 05:10:35,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885356683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:10:35,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:10:35,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:10:35,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249028727] [2021-11-03 05:10:35,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:10:35,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:10:35,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:10:35,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:10:35,797 INFO L87 Difference]: Start difference. First operand 151 states and 235 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 05:10:35,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:10:35,907 INFO L93 Difference]: Finished difference Result 179 states and 276 transitions. [2021-11-03 05:10:35,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:10:35,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 63 [2021-11-03 05:10:35,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:10:35,909 INFO L225 Difference]: With dead ends: 179 [2021-11-03 05:10:35,909 INFO L226 Difference]: Without dead ends: 159 [2021-11-03 05:10:35,910 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 05:10:35,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-03 05:10:35,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2021-11-03 05:10:35,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.5629139072847682) internal successors, (236), 151 states have internal predecessors, (236), 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 05:10:35,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 236 transitions. [2021-11-03 05:10:35,917 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 236 transitions. Word has length 63 [2021-11-03 05:10:35,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:10:35,918 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 236 transitions. [2021-11-03 05:10:35,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 05:10:35,918 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 236 transitions. [2021-11-03 05:10:35,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 05:10:35,919 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:10:35,920 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] [2021-11-03 05:10:35,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 05:10:35,920 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:10:35,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:10:35,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1376506426, now seen corresponding path program 1 times [2021-11-03 05:10:35,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:10:35,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893600177] [2021-11-03 05:10:35,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:35,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:10:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:36,100 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 05:10:36,101 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:10:36,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893600177] [2021-11-03 05:10:36,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893600177] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:10:36,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:10:36,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 05:10:36,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960052144] [2021-11-03 05:10:36,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:10:36,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:10:36,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:10:36,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:10:36,104 INFO L87 Difference]: Start difference. First operand 152 states and 236 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:36,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:10:36,309 INFO L93 Difference]: Finished difference Result 201 states and 312 transitions. [2021-11-03 05:10:36,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:10:36,310 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-03 05:10:36,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:10:36,312 INFO L225 Difference]: With dead ends: 201 [2021-11-03 05:10:36,312 INFO L226 Difference]: Without dead ends: 181 [2021-11-03 05:10:36,312 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 05:10:36,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-03 05:10:36,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 155. [2021-11-03 05:10:36,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.5454545454545454) internal successors, (238), 154 states have internal predecessors, (238), 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 05:10:36,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 238 transitions. [2021-11-03 05:10:36,321 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 238 transitions. Word has length 64 [2021-11-03 05:10:36,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:10:36,321 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 238 transitions. [2021-11-03 05:10:36,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:36,322 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 238 transitions. [2021-11-03 05:10:36,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 05:10:36,323 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:10:36,323 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] [2021-11-03 05:10:36,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 05:10:36,324 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:10:36,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:10:36,324 INFO L85 PathProgramCache]: Analyzing trace with hash -2041458821, now seen corresponding path program 1 times [2021-11-03 05:10:36,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:10:36,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980018024] [2021-11-03 05:10:36,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:36,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:10:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:37,117 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 05:10:37,117 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:10:37,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980018024] [2021-11-03 05:10:37,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980018024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:10:37,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557357459] [2021-11-03 05:10:37,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:37,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:10:37,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d197cae5-27cf-4a33-9829-7df123a43e1a/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:10:37,121 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d197cae5-27cf-4a33-9829-7df123a43e1a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:10:37,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d197cae5-27cf-4a33-9829-7df123a43e1a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 05:10:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:37,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-03 05:10:37,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:12:06,098 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 05:12:06,099 INFO L328 TraceCheckSpWp]: Computing backward predicates...