./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.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_d4d2c790-bd1c-497f-acd3-749634e36c77/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d2c790-bd1c-497f-acd3-749634e36c77/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_d4d2c790-bd1c-497f-acd3-749634e36c77/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d2c790-bd1c-497f-acd3-749634e36c77/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d2c790-bd1c-497f-acd3-749634e36c77/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_d4d2c790-bd1c-497f-acd3-749634e36c77/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 d869d36578fc433cb3bcbc293e270e4f10048025e6637a1ca792146288a88a6e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:17:27,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:17:27,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:17:27,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:17:27,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:17:27,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:17:27,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:17:27,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:17:27,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:17:27,595 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:17:27,597 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:17:27,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:17:27,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:17:27,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:17:27,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:17:27,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:17:27,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:17:27,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:17:27,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:17:27,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:17:27,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:17:27,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:17:27,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:17:27,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:17:27,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:17:27,618 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:17:27,619 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:17:27,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:17:27,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:17:27,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:17:27,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:17:27,623 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:17:27,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:17:27,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:17:27,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:17:27,626 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:17:27,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:17:27,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:17:27,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:17:27,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:17:27,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:17:27,630 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d2c790-bd1c-497f-acd3-749634e36c77/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:17:27,657 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:17:27,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:17:27,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:17:27,658 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:17:27,659 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:17:27,659 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:17:27,659 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:17:27,659 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:17:27,659 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:17:27,660 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:17:27,660 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:17:27,660 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:17:27,660 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:17:27,661 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:17:27,661 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:17:27,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:17:27,662 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:17:27,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:17:27,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:17:27,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:17:27,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:17:27,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:17:27,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:17:27,663 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:17:27,663 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:17:27,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:17:27,664 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:17:27,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:17:27,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:17:27,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:17:27,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:17:27,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:17:27,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:17:27,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:17:27,665 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:17:27,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:17:27,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:17:27,666 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:17:27,666 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:17:27,666 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_d4d2c790-bd1c-497f-acd3-749634e36c77/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d2c790-bd1c-497f-acd3-749634e36c77/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d869d36578fc433cb3bcbc293e270e4f10048025e6637a1ca792146288a88a6e [2021-11-03 05:17:27,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:17:27,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:17:27,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:17:27,957 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:17:27,958 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:17:27,959 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d2c790-bd1c-497f-acd3-749634e36c77/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-03 05:17:28,059 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d2c790-bd1c-497f-acd3-749634e36c77/bin/utaipan-aC7eJsxGYH/data/afc5c4afd/fddc0a5764cb4ebf9a4772917572e7b8/FLAGaf835153a [2021-11-03 05:17:28,659 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:17:28,660 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d2c790-bd1c-497f-acd3-749634e36c77/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-03 05:17:28,683 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d2c790-bd1c-497f-acd3-749634e36c77/bin/utaipan-aC7eJsxGYH/data/afc5c4afd/fddc0a5764cb4ebf9a4772917572e7b8/FLAGaf835153a [2021-11-03 05:17:28,873 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d2c790-bd1c-497f-acd3-749634e36c77/bin/utaipan-aC7eJsxGYH/data/afc5c4afd/fddc0a5764cb4ebf9a4772917572e7b8 [2021-11-03 05:17:28,876 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:17:28,877 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:17:28,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:17:28,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:17:28,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:17:28,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:17:28" (1/1) ... [2021-11-03 05:17:28,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f996aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:28, skipping insertion in model container [2021-11-03 05:17:28,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:17:28" (1/1) ... [2021-11-03 05:17:28,894 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:17:28,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:17:29,516 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_d4d2c790-bd1c-497f-acd3-749634e36c77/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[24323,24336] [2021-11-03 05:17:29,580 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_d4d2c790-bd1c-497f-acd3-749634e36c77/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[28161,28174] [2021-11-03 05:17:29,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:17:29,826 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:17:30,243 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_d4d2c790-bd1c-497f-acd3-749634e36c77/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[24323,24336] [2021-11-03 05:17:30,298 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_d4d2c790-bd1c-497f-acd3-749634e36c77/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[28161,28174] [2021-11-03 05:17:30,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:17:30,490 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:17:30,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:30 WrapperNode [2021-11-03 05:17:30,490 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:17:30,492 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:17:30,492 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:17:30,492 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:17:30,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:30" (1/1) ... [2021-11-03 05:17:30,553 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:30" (1/1) ... [2021-11-03 05:17:30,685 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:17:30,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:17:30,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:17:30,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:17:30,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:30" (1/1) ... [2021-11-03 05:17:30,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:30" (1/1) ... [2021-11-03 05:17:30,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:30" (1/1) ... [2021-11-03 05:17:30,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:30" (1/1) ... [2021-11-03 05:17:30,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:30" (1/1) ... [2021-11-03 05:17:30,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:30" (1/1) ... [2021-11-03 05:17:30,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:30" (1/1) ... [2021-11-03 05:17:30,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:17:30,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:17:30,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:17:30,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:17:30,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:30" (1/1) ... [2021-11-03 05:17:30,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:17:30,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d2c790-bd1c-497f-acd3-749634e36c77/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:17:30,919 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d2c790-bd1c-497f-acd3-749634e36c77/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:17:30,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d2c790-bd1c-497f-acd3-749634e36c77/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:17:30,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:17:30,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:17:30,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:17:30,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:17:34,725 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:17:34,725 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-03 05:17:34,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:17:34 BoogieIcfgContainer [2021-11-03 05:17:34,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:17:34,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:17:34,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:17:34,736 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:17:34,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:17:28" (1/3) ... [2021-11-03 05:17:34,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a3d703b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:17:34, skipping insertion in model container [2021-11-03 05:17:34,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:30" (2/3) ... [2021-11-03 05:17:34,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a3d703b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:17:34, skipping insertion in model container [2021-11-03 05:17:34,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:17:34" (3/3) ... [2021-11-03 05:17:34,740 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-03 05:17:34,747 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:17:34,748 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-03 05:17:34,813 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:17:34,821 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 05:17:34,821 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-03 05:17:34,868 INFO L276 IsEmpty]: Start isEmpty. Operand has 490 states, 487 states have (on average 1.7166324435318274) internal successors, (836), 489 states have internal predecessors, (836), 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 05:17:34,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-03 05:17:34,919 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:34,920 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:17:34,920 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:17:34,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:34,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1693198294, now seen corresponding path program 1 times [2021-11-03 05:17:34,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:17:34,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121565783] [2021-11-03 05:17:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:34,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:17:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:36,373 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 05:17:36,374 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:17:36,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121565783] [2021-11-03 05:17:36,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121565783] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:36,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:36,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:17:36,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795941306] [2021-11-03 05:17:36,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:17:36,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:17:36,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:17:36,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:17:36,415 INFO L87 Difference]: Start difference. First operand has 490 states, 487 states have (on average 1.7166324435318274) internal successors, (836), 489 states have internal predecessors, (836), 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 52.5) internal successors, (210), 3 states have internal predecessors, (210), 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 05:17:36,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:36,769 INFO L93 Difference]: Finished difference Result 1442 states and 2463 transitions. [2021-11-03 05:17:36,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:17:36,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 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 210 [2021-11-03 05:17:36,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:36,805 INFO L225 Difference]: With dead ends: 1442 [2021-11-03 05:17:36,805 INFO L226 Difference]: Without dead ends: 957 [2021-11-03 05:17:36,817 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:17:36,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2021-11-03 05:17:36,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 936. [2021-11-03 05:17:36,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 934 states have (on average 1.4089935760171306) internal successors, (1316), 935 states have internal predecessors, (1316), 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 05:17:36,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1316 transitions. [2021-11-03 05:17:36,981 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1316 transitions. Word has length 210 [2021-11-03 05:17:36,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:36,982 INFO L470 AbstractCegarLoop]: Abstraction has 936 states and 1316 transitions. [2021-11-03 05:17:36,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 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 05:17:36,983 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1316 transitions. [2021-11-03 05:17:36,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-03 05:17:36,988 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:36,988 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:17:36,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 05:17:36,989 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:17:36,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:36,990 INFO L85 PathProgramCache]: Analyzing trace with hash -981193504, now seen corresponding path program 1 times [2021-11-03 05:17:36,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:17:36,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958289949] [2021-11-03 05:17:36,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:36,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:17:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:37,236 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 05:17:37,237 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:17:37,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958289949] [2021-11-03 05:17:37,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958289949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:37,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:37,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:17:37,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456650485] [2021-11-03 05:17:37,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:17:37,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:17:37,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:17:37,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:17:37,243 INFO L87 Difference]: Start difference. First operand 936 states and 1316 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 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 05:17:37,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:37,396 INFO L93 Difference]: Finished difference Result 2655 states and 3710 transitions. [2021-11-03 05:17:37,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:17:37,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 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 212 [2021-11-03 05:17:37,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:37,417 INFO L225 Difference]: With dead ends: 2655 [2021-11-03 05:17:37,417 INFO L226 Difference]: Without dead ends: 1840 [2021-11-03 05:17:37,420 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:17:37,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-11-03 05:17:37,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1819. [2021-11-03 05:17:37,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1817 states have (on average 1.407264722069345) internal successors, (2557), 1818 states have internal predecessors, (2557), 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 05:17:37,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2557 transitions. [2021-11-03 05:17:37,538 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2557 transitions. Word has length 212 [2021-11-03 05:17:37,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:37,542 INFO L470 AbstractCegarLoop]: Abstraction has 1819 states and 2557 transitions. [2021-11-03 05:17:37,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 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 05:17:37,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2557 transitions. [2021-11-03 05:17:37,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-03 05:17:37,549 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:37,550 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:17:37,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 05:17:37,551 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:17:37,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:37,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1113227240, now seen corresponding path program 1 times [2021-11-03 05:17:37,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:17:37,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266863942] [2021-11-03 05:17:37,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:37,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:17:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:37,658 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 05:17:37,659 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:17:37,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266863942] [2021-11-03 05:17:37,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266863942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:37,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:37,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:17:37,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089425409] [2021-11-03 05:17:37,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:17:37,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:17:37,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:17:37,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:17:37,672 INFO L87 Difference]: Start difference. First operand 1819 states and 2557 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 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 05:17:37,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:37,955 INFO L93 Difference]: Finished difference Result 5305 states and 7438 transitions. [2021-11-03 05:17:37,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:17:37,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 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 212 [2021-11-03 05:17:37,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:37,980 INFO L225 Difference]: With dead ends: 5305 [2021-11-03 05:17:37,980 INFO L226 Difference]: Without dead ends: 3618 [2021-11-03 05:17:37,984 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:17:37,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3618 states. [2021-11-03 05:17:38,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3618 to 1822. [2021-11-03 05:17:38,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1820 states have (on average 1.4065934065934067) internal successors, (2560), 1821 states have internal predecessors, (2560), 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 05:17:38,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2560 transitions. [2021-11-03 05:17:38,194 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2560 transitions. Word has length 212 [2021-11-03 05:17:38,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:38,195 INFO L470 AbstractCegarLoop]: Abstraction has 1822 states and 2560 transitions. [2021-11-03 05:17:38,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 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 05:17:38,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2560 transitions. [2021-11-03 05:17:38,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-03 05:17:38,203 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:38,204 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:17:38,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 05:17:38,205 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:17:38,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:38,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1513995603, now seen corresponding path program 1 times [2021-11-03 05:17:38,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:17:38,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764320420] [2021-11-03 05:17:38,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:38,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:17:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:38,743 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 05:17:38,744 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:17:38,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764320420] [2021-11-03 05:17:38,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764320420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:38,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:38,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:17:38,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684201442] [2021-11-03 05:17:38,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:17:38,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:17:38,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:17:38,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:17:38,753 INFO L87 Difference]: Start difference. First operand 1822 states and 2560 transitions. Second operand has 5 states, 5 states have (on average 42.6) internal successors, (213), 4 states have internal predecessors, (213), 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 05:17:39,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:39,168 INFO L93 Difference]: Finished difference Result 5264 states and 7375 transitions. [2021-11-03 05:17:39,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:17:39,169 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 4 states have internal predecessors, (213), 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 213 [2021-11-03 05:17:39,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:39,195 INFO L225 Difference]: With dead ends: 5264 [2021-11-03 05:17:39,195 INFO L226 Difference]: Without dead ends: 3457 [2021-11-03 05:17:39,203 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:17:39,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3457 states. [2021-11-03 05:17:39,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3457 to 3436. [2021-11-03 05:17:39,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3436 states, 3434 states have (on average 1.3940011648223647) internal successors, (4787), 3435 states have internal predecessors, (4787), 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 05:17:39,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3436 states to 3436 states and 4787 transitions. [2021-11-03 05:17:39,569 INFO L78 Accepts]: Start accepts. Automaton has 3436 states and 4787 transitions. Word has length 213 [2021-11-03 05:17:39,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:39,572 INFO L470 AbstractCegarLoop]: Abstraction has 3436 states and 4787 transitions. [2021-11-03 05:17:39,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 4 states have internal predecessors, (213), 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 05:17:39,573 INFO L276 IsEmpty]: Start isEmpty. Operand 3436 states and 4787 transitions. [2021-11-03 05:17:39,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-03 05:17:39,582 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:39,583 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:17:39,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 05:17:39,583 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:17:39,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:39,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1170298391, now seen corresponding path program 1 times [2021-11-03 05:17:39,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:17:39,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625190214] [2021-11-03 05:17:39,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:39,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:17:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:39,912 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 05:17:39,912 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:17:39,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625190214] [2021-11-03 05:17:39,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625190214] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:39,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:39,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:17:39,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450578786] [2021-11-03 05:17:39,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:17:39,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:17:39,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:17:39,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:17:39,915 INFO L87 Difference]: Start difference. First operand 3436 states and 4787 transitions. Second operand has 4 states, 4 states have (on average 53.5) internal successors, (214), 3 states have internal predecessors, (214), 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 05:17:40,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:40,517 INFO L93 Difference]: Finished difference Result 10016 states and 13924 transitions. [2021-11-03 05:17:40,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:17:40,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 3 states have internal predecessors, (214), 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 214 [2021-11-03 05:17:40,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:40,575 INFO L225 Difference]: With dead ends: 10016 [2021-11-03 05:17:40,576 INFO L226 Difference]: Without dead ends: 6718 [2021-11-03 05:17:40,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:17:40,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6718 states. [2021-11-03 05:17:41,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6718 to 6697. [2021-11-03 05:17:41,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6697 states, 6695 states have (on average 1.3856609410007468) internal successors, (9277), 6696 states have internal predecessors, (9277), 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 05:17:41,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6697 states to 6697 states and 9277 transitions. [2021-11-03 05:17:41,357 INFO L78 Accepts]: Start accepts. Automaton has 6697 states and 9277 transitions. Word has length 214 [2021-11-03 05:17:41,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:41,358 INFO L470 AbstractCegarLoop]: Abstraction has 6697 states and 9277 transitions. [2021-11-03 05:17:41,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 3 states have internal predecessors, (214), 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 05:17:41,359 INFO L276 IsEmpty]: Start isEmpty. Operand 6697 states and 9277 transitions. [2021-11-03 05:17:41,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-03 05:17:41,378 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:41,379 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:17:41,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 05:17:41,379 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:17:41,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:41,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1674194278, now seen corresponding path program 1 times [2021-11-03 05:17:41,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:17:41,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185999053] [2021-11-03 05:17:41,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:41,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:17:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:41,760 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 05:17:41,761 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:17:41,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185999053] [2021-11-03 05:17:41,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185999053] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:41,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:41,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:17:41,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179307671] [2021-11-03 05:17:41,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:17:41,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:17:41,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:17:41,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:17:41,764 INFO L87 Difference]: Start difference. First operand 6697 states and 9277 transitions. Second operand has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 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 05:17:42,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:42,984 INFO L93 Difference]: Finished difference Result 19615 states and 27118 transitions. [2021-11-03 05:17:42,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:17:42,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 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 216 [2021-11-03 05:17:42,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:43,069 INFO L225 Difference]: With dead ends: 19615 [2021-11-03 05:17:43,070 INFO L226 Difference]: Without dead ends: 13060 [2021-11-03 05:17:43,082 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:17:43,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13060 states. [2021-11-03 05:17:44,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13060 to 13039. [2021-11-03 05:17:44,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13039 states, 13037 states have (on average 1.3740891309350312) internal successors, (17914), 13038 states have internal predecessors, (17914), 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 05:17:44,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13039 states to 13039 states and 17914 transitions. [2021-11-03 05:17:44,452 INFO L78 Accepts]: Start accepts. Automaton has 13039 states and 17914 transitions. Word has length 216 [2021-11-03 05:17:44,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:44,452 INFO L470 AbstractCegarLoop]: Abstraction has 13039 states and 17914 transitions. [2021-11-03 05:17:44,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 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 05:17:44,454 INFO L276 IsEmpty]: Start isEmpty. Operand 13039 states and 17914 transitions. [2021-11-03 05:17:44,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-03 05:17:44,499 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:44,499 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:17:44,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 05:17:44,500 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:17:44,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:44,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1621503621, now seen corresponding path program 1 times [2021-11-03 05:17:44,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:17:44,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337657463] [2021-11-03 05:17:44,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:44,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:17:44,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:44,655 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 05:17:44,656 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:17:44,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337657463] [2021-11-03 05:17:44,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337657463] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:44,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:44,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:17:44,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097588722] [2021-11-03 05:17:44,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:17:44,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:17:44,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:17:44,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:17:44,660 INFO L87 Difference]: Start difference. First operand 13039 states and 17914 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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 05:17:46,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:46,566 INFO L93 Difference]: Finished difference Result 37040 states and 50583 transitions. [2021-11-03 05:17:46,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:17:46,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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 218 [2021-11-03 05:17:46,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:46,665 INFO L225 Difference]: With dead ends: 37040 [2021-11-03 05:17:46,666 INFO L226 Difference]: Without dead ends: 25563 [2021-11-03 05:17:46,695 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:17:46,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25563 states. [2021-11-03 05:17:48,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25563 to 25542. [2021-11-03 05:17:48,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25542 states, 25540 states have (on average 1.3669929522317932) internal successors, (34913), 25541 states have internal predecessors, (34913), 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 05:17:48,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25542 states to 25542 states and 34913 transitions. [2021-11-03 05:17:48,450 INFO L78 Accepts]: Start accepts. Automaton has 25542 states and 34913 transitions. Word has length 218 [2021-11-03 05:17:48,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:48,451 INFO L470 AbstractCegarLoop]: Abstraction has 25542 states and 34913 transitions. [2021-11-03 05:17:48,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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 05:17:48,452 INFO L276 IsEmpty]: Start isEmpty. Operand 25542 states and 34913 transitions. [2021-11-03 05:17:48,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-03 05:17:48,525 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:48,526 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:17:48,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 05:17:48,527 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:17:48,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:48,529 INFO L85 PathProgramCache]: Analyzing trace with hash -2084475563, now seen corresponding path program 1 times [2021-11-03 05:17:48,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:17:48,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314804486] [2021-11-03 05:17:48,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:48,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:17:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:48,744 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 05:17:48,744 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:17:48,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314804486] [2021-11-03 05:17:48,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314804486] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:48,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:48,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:17:48,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875741873] [2021-11-03 05:17:48,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:17:48,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:17:48,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:17:48,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:17:48,748 INFO L87 Difference]: Start difference. First operand 25542 states and 34913 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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 05:17:51,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:51,278 INFO L93 Difference]: Finished difference Result 74691 states and 101857 transitions. [2021-11-03 05:17:51,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:17:51,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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 218 [2021-11-03 05:17:51,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:51,443 INFO L225 Difference]: With dead ends: 74691 [2021-11-03 05:17:51,443 INFO L226 Difference]: Without dead ends: 50835 [2021-11-03 05:17:51,506 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:17:51,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50835 states. [2021-11-03 05:17:53,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50835 to 25575. [2021-11-03 05:17:53,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25575 states, 25573 states have (on average 1.366519375904274) internal successors, (34946), 25574 states have internal predecessors, (34946), 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 05:17:53,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25575 states to 25575 states and 34946 transitions. [2021-11-03 05:17:53,771 INFO L78 Accepts]: Start accepts. Automaton has 25575 states and 34946 transitions. Word has length 218 [2021-11-03 05:17:53,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:53,771 INFO L470 AbstractCegarLoop]: Abstraction has 25575 states and 34946 transitions. [2021-11-03 05:17:53,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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 05:17:53,772 INFO L276 IsEmpty]: Start isEmpty. Operand 25575 states and 34946 transitions. [2021-11-03 05:17:53,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-03 05:17:53,830 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:53,830 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:17:53,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 05:17:53,831 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:17:53,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:53,832 INFO L85 PathProgramCache]: Analyzing trace with hash 233775084, now seen corresponding path program 1 times [2021-11-03 05:17:53,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:17:53,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550189181] [2021-11-03 05:17:53,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:53,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:17:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:54,139 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 05:17:54,139 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:17:54,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550189181] [2021-11-03 05:17:54,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550189181] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:54,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:54,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:17:54,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105408399] [2021-11-03 05:17:54,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:17:54,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:17:54,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:17:54,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:17:54,141 INFO L87 Difference]: Start difference. First operand 25575 states and 34946 transitions. Second operand has 5 states, 5 states have (on average 43.8) internal successors, (219), 4 states have internal predecessors, (219), 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 05:17:57,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:57,466 INFO L93 Difference]: Finished difference Result 74016 states and 100821 transitions. [2021-11-03 05:17:57,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:17:57,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.8) internal successors, (219), 4 states have internal predecessors, (219), 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 219 [2021-11-03 05:17:57,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:57,568 INFO L225 Difference]: With dead ends: 74016 [2021-11-03 05:17:57,568 INFO L226 Difference]: Without dead ends: 48641 [2021-11-03 05:17:57,612 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:17:57,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48641 states. [2021-11-03 05:18:01,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48641 to 48620. [2021-11-03 05:18:01,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48620 states, 48618 states have (on average 1.3545806080052656) internal successors, (65857), 48619 states have internal predecessors, (65857), 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 05:18:01,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48620 states to 48620 states and 65857 transitions. [2021-11-03 05:18:01,256 INFO L78 Accepts]: Start accepts. Automaton has 48620 states and 65857 transitions. Word has length 219 [2021-11-03 05:18:01,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:01,257 INFO L470 AbstractCegarLoop]: Abstraction has 48620 states and 65857 transitions. [2021-11-03 05:18:01,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.8) internal successors, (219), 4 states have internal predecessors, (219), 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 05:18:01,258 INFO L276 IsEmpty]: Start isEmpty. Operand 48620 states and 65857 transitions. [2021-11-03 05:18:01,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-03 05:18:01,341 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:01,342 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:18:01,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 05:18:01,344 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:18:01,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:01,345 INFO L85 PathProgramCache]: Analyzing trace with hash -636370262, now seen corresponding path program 1 times [2021-11-03 05:18:01,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:18:01,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821804971] [2021-11-03 05:18:01,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:01,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:18:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:01,704 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 05:18:01,704 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:18:01,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821804971] [2021-11-03 05:18:01,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821804971] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:01,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:01,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:18:01,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933533367] [2021-11-03 05:18:01,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:18:01,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:18:01,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:18:01,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:18:01,709 INFO L87 Difference]: Start difference. First operand 48620 states and 65857 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 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 05:18:07,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:07,625 INFO L93 Difference]: Finished difference Result 141556 states and 191173 transitions. [2021-11-03 05:18:07,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:18:07,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 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 220 [2021-11-03 05:18:07,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:07,893 INFO L225 Difference]: With dead ends: 141556 [2021-11-03 05:18:07,893 INFO L226 Difference]: Without dead ends: 95200 [2021-11-03 05:18:07,957 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:18:08,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95200 states. [2021-11-03 05:18:15,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95200 to 95179. [2021-11-03 05:18:15,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95179 states, 95177 states have (on average 1.347006104415983) internal successors, (128204), 95178 states have internal predecessors, (128204), 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 05:18:15,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95179 states to 95179 states and 128204 transitions. [2021-11-03 05:18:15,254 INFO L78 Accepts]: Start accepts. Automaton has 95179 states and 128204 transitions. Word has length 220 [2021-11-03 05:18:15,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:15,254 INFO L470 AbstractCegarLoop]: Abstraction has 95179 states and 128204 transitions. [2021-11-03 05:18:15,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 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 05:18:15,254 INFO L276 IsEmpty]: Start isEmpty. Operand 95179 states and 128204 transitions. [2021-11-03 05:18:15,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-03 05:18:15,390 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:15,390 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:18:15,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 05:18:15,391 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:18:15,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:15,391 INFO L85 PathProgramCache]: Analyzing trace with hash 831942124, now seen corresponding path program 1 times [2021-11-03 05:18:15,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:18:15,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065659782] [2021-11-03 05:18:15,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:15,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:18:15,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:15,642 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 05:18:15,642 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:18:15,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065659782] [2021-11-03 05:18:15,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065659782] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:15,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:15,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:18:15,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977466079] [2021-11-03 05:18:15,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:18:15,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:18:15,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:18:15,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:18:15,646 INFO L87 Difference]: Start difference. First operand 95179 states and 128204 transitions. Second operand has 4 states, 4 states have (on average 55.5) internal successors, (222), 3 states have internal predecessors, (222), 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 05:18:23,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:23,547 INFO L93 Difference]: Finished difference Result 207185 states and 278550 transitions. [2021-11-03 05:18:23,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:18:23,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 3 states have internal predecessors, (222), 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 222 [2021-11-03 05:18:23,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:23,764 INFO L225 Difference]: With dead ends: 207185 [2021-11-03 05:18:23,765 INFO L226 Difference]: Without dead ends: 113507 [2021-11-03 05:18:23,851 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:18:24,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113507 states.