./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+nlh-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_517760d2-1410-4db0-9028-f111eedf5f66/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517760d2-1410-4db0-9028-f111eedf5f66/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_517760d2-1410-4db0-9028-f111eedf5f66/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517760d2-1410-4db0-9028-f111eedf5f66/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517760d2-1410-4db0-9028-f111eedf5f66/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_517760d2-1410-4db0-9028-f111eedf5f66/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 0c4724c33b5661622200de0fed8dad65f1ae1f933d895c5b69dbf57e0bc97fda --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:11:27,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:11:27,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:11:27,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:11:27,613 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:11:27,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:11:27,616 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:11:27,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:11:27,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:11:27,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:11:27,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:11:27,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:11:27,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:11:27,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:11:27,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:11:27,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:11:27,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:11:27,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:11:27,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:11:27,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:11:27,645 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:11:27,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:11:27,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:11:27,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:11:27,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:11:27,652 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:11:27,653 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:11:27,654 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:11:27,654 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:11:27,655 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:11:27,656 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:11:27,657 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:11:27,657 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:11:27,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:11:27,660 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:11:27,660 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:11:27,661 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:11:27,661 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:11:27,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:11:27,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:11:27,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:11:27,664 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517760d2-1410-4db0-9028-f111eedf5f66/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:11:27,689 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:11:27,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:11:27,690 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:11:27,690 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:11:27,691 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:11:27,691 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:11:27,691 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:11:27,691 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:11:27,691 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:11:27,692 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:11:27,692 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:11:27,692 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:11:27,692 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:11:27,692 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:11:27,693 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:11:27,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:11:27,693 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:11:27,694 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:11:27,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:11:27,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:11:27,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:11:27,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:11:27,695 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:11:27,698 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:11:27,698 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:11:27,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:11:27,698 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:11:27,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:11:27,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:11:27,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:11:27,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:11:27,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:11:27,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:11:27,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:11:27,702 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:11:27,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:11:27,703 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:11:27,703 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:11:27,703 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:11:27,704 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517760d2-1410-4db0-9028-f111eedf5f66/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517760d2-1410-4db0-9028-f111eedf5f66/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0c4724c33b5661622200de0fed8dad65f1ae1f933d895c5b69dbf57e0bc97fda [2021-11-03 05:11:27,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:11:27,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:11:27,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:11:27,994 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:11:27,995 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:11:27,996 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517760d2-1410-4db0-9028-f111eedf5f66/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-03 05:11:28,059 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517760d2-1410-4db0-9028-f111eedf5f66/bin/utaipan-aC7eJsxGYH/data/9c19b8f3c/633dcebd3d8c41af80a2902abadf7490/FLAG9338f02b8 [2021-11-03 05:11:28,740 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:11:28,742 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517760d2-1410-4db0-9028-f111eedf5f66/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-03 05:11:28,765 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517760d2-1410-4db0-9028-f111eedf5f66/bin/utaipan-aC7eJsxGYH/data/9c19b8f3c/633dcebd3d8c41af80a2902abadf7490/FLAG9338f02b8 [2021-11-03 05:11:28,920 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517760d2-1410-4db0-9028-f111eedf5f66/bin/utaipan-aC7eJsxGYH/data/9c19b8f3c/633dcebd3d8c41af80a2902abadf7490 [2021-11-03 05:11:28,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:11:28,927 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:11:28,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:11:28,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:11:28,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:11:28,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:11:28" (1/1) ... [2021-11-03 05:11:28,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@abce276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:11:28, skipping insertion in model container [2021-11-03 05:11:28,942 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:11:28" (1/1) ... [2021-11-03 05:11:28,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:11:29,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:11:29,595 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_517760d2-1410-4db0-9028-f111eedf5f66/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[31621,31634] [2021-11-03 05:11:29,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:11:29,797 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:11:30,321 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_517760d2-1410-4db0-9028-f111eedf5f66/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[31621,31634] [2021-11-03 05:11:30,453 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:11:30,472 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:11:30,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:11:30 WrapperNode [2021-11-03 05:11:30,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:11:30,474 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:11:30,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:11:30,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:11:30,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:11:30" (1/1) ... [2021-11-03 05:11:30,505 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:11:30" (1/1) ... [2021-11-03 05:11:30,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:11:30,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:11:30,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:11:30,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:11:30,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:11:30" (1/1) ... [2021-11-03 05:11:30,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:11:30" (1/1) ... [2021-11-03 05:11:30,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:11:30" (1/1) ... [2021-11-03 05:11:30,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:11:30" (1/1) ... [2021-11-03 05:11:30,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:11:30" (1/1) ... [2021-11-03 05:11:30,685 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:11:30" (1/1) ... [2021-11-03 05:11:30,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:11:30" (1/1) ... [2021-11-03 05:11:30,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:11:30,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:11:30,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:11:30,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:11:30,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:11:30" (1/1) ... [2021-11-03 05:11:30,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:11:30,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517760d2-1410-4db0-9028-f111eedf5f66/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:11:30,737 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517760d2-1410-4db0-9028-f111eedf5f66/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:11:30,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517760d2-1410-4db0-9028-f111eedf5f66/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:11:30,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:11:30,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:11:30,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:11:30,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:11:34,256 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:11:34,257 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-03 05:11:34,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:11:34 BoogieIcfgContainer [2021-11-03 05:11:34,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:11:34,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:11:34,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:11:34,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:11:34,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:11:28" (1/3) ... [2021-11-03 05:11:34,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b4db3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:11:34, skipping insertion in model container [2021-11-03 05:11:34,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:11:30" (2/3) ... [2021-11-03 05:11:34,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b4db3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:11:34, skipping insertion in model container [2021-11-03 05:11:34,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:11:34" (3/3) ... [2021-11-03 05:11:34,270 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-03 05:11:34,275 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:11:34,276 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:11:34,327 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:11:34,332 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 05:11:34,333 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:11:34,362 INFO L276 IsEmpty]: Start isEmpty. Operand has 563 states, 561 states have (on average 1.7005347593582887) internal successors, (954), 562 states have internal predecessors, (954), 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 05:11:34,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-11-03 05:11:34,381 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:11:34,382 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, 1, 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 05:11:34,383 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:11:34,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:11:34,388 INFO L85 PathProgramCache]: Analyzing trace with hash 286683257, now seen corresponding path program 1 times [2021-11-03 05:11:34,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:11:34,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150471920] [2021-11-03 05:11:34,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:11:34,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:11:35,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:11:35,838 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 05:11:35,839 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:11:35,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150471920] [2021-11-03 05:11:35,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150471920] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:11:35,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:11:35,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:11:35,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821879644] [2021-11-03 05:11:35,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:11:35,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:11:35,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:11:35,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:11:35,881 INFO L87 Difference]: Start difference. First operand has 563 states, 561 states have (on average 1.7005347593582887) internal successors, (954), 562 states have internal predecessors, (954), 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 61.75) internal successors, (247), 3 states have internal predecessors, (247), 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 05:11:36,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:11:36,181 INFO L93 Difference]: Finished difference Result 1657 states and 2811 transitions. [2021-11-03 05:11:36,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:11:36,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 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 247 [2021-11-03 05:11:36,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:11:36,212 INFO L225 Difference]: With dead ends: 1657 [2021-11-03 05:11:36,213 INFO L226 Difference]: Without dead ends: 1099 [2021-11-03 05:11:36,223 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 05:11:36,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-11-03 05:11:36,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 1097. [2021-11-03 05:11:36,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 1096 states have (on average 1.4169708029197081) internal successors, (1553), 1096 states have internal predecessors, (1553), 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 05:11:36,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1553 transitions. [2021-11-03 05:11:36,359 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1553 transitions. Word has length 247 [2021-11-03 05:11:36,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:11:36,360 INFO L470 AbstractCegarLoop]: Abstraction has 1097 states and 1553 transitions. [2021-11-03 05:11:36,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 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 05:11:36,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1553 transitions. [2021-11-03 05:11:36,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-11-03 05:11:36,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:11:36,371 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, 1, 1, 1, 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 05:11:36,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 05:11:36,372 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:11:36,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:11:36,373 INFO L85 PathProgramCache]: Analyzing trace with hash 2043274422, now seen corresponding path program 1 times [2021-11-03 05:11:36,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:11:36,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970603830] [2021-11-03 05:11:36,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:11:36,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:11:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:11:36,601 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 05:11:36,602 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:11:36,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970603830] [2021-11-03 05:11:36,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970603830] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:11:36,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:11:36,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:11:36,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990859944] [2021-11-03 05:11:36,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:11:36,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:11:36,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:11:36,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:11:36,612 INFO L87 Difference]: Start difference. First operand 1097 states and 1553 transitions. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 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 05:11:36,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:11:36,775 INFO L93 Difference]: Finished difference Result 3130 states and 4409 transitions. [2021-11-03 05:11:36,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:11:36,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 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 249 [2021-11-03 05:11:36,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:11:36,790 INFO L225 Difference]: With dead ends: 3130 [2021-11-03 05:11:36,790 INFO L226 Difference]: Without dead ends: 2154 [2021-11-03 05:11:36,793 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 05:11:36,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2021-11-03 05:11:36,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 2152. [2021-11-03 05:11:36,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 1.4109716410971642) internal successors, (3035), 2151 states have internal predecessors, (3035), 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 05:11:36,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 3035 transitions. [2021-11-03 05:11:36,933 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 3035 transitions. Word has length 249 [2021-11-03 05:11:36,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:11:36,935 INFO L470 AbstractCegarLoop]: Abstraction has 2152 states and 3035 transitions. [2021-11-03 05:11:36,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 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 05:11:36,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 3035 transitions. [2021-11-03 05:11:36,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-11-03 05:11:36,945 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:11:36,945 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, 1, 1, 1, 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 05:11:36,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 05:11:36,946 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:11:36,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:11:36,956 INFO L85 PathProgramCache]: Analyzing trace with hash -674673057, now seen corresponding path program 1 times [2021-11-03 05:11:36,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:11:36,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883971646] [2021-11-03 05:11:36,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:11:36,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:11:36,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:11:37,054 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 05:11:37,055 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:11:37,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883971646] [2021-11-03 05:11:37,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883971646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:11:37,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:11:37,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:11:37,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618918590] [2021-11-03 05:11:37,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:11:37,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:11:37,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:11:37,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:11:37,067 INFO L87 Difference]: Start difference. First operand 2152 states and 3035 transitions. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 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 05:11:37,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:11:37,308 INFO L93 Difference]: Finished difference Result 6304 states and 8872 transitions. [2021-11-03 05:11:37,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:11:37,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 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 249 [2021-11-03 05:11:37,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:11:37,335 INFO L225 Difference]: With dead ends: 6304 [2021-11-03 05:11:37,335 INFO L226 Difference]: Without dead ends: 4284 [2021-11-03 05:11:37,340 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 05:11:37,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4284 states. [2021-11-03 05:11:37,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4284 to 2155. [2021-11-03 05:11:37,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2154 states have (on average 1.4103992571959145) internal successors, (3038), 2154 states have internal predecessors, (3038), 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 05:11:37,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 3038 transitions. [2021-11-03 05:11:37,530 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 3038 transitions. Word has length 249 [2021-11-03 05:11:37,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:11:37,530 INFO L470 AbstractCegarLoop]: Abstraction has 2155 states and 3038 transitions. [2021-11-03 05:11:37,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 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 05:11:37,531 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 3038 transitions. [2021-11-03 05:11:37,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-03 05:11:37,537 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:11:37,538 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, 1, 1, 1, 1, 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 05:11:37,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 05:11:37,539 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:11:37,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:11:37,540 INFO L85 PathProgramCache]: Analyzing trace with hash -953674409, now seen corresponding path program 1 times [2021-11-03 05:11:37,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:11:37,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375242381] [2021-11-03 05:11:37,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:11:37,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:11:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:11:38,051 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 05:11:38,052 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:11:38,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375242381] [2021-11-03 05:11:38,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375242381] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:11:38,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:11:38,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:11:38,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123546622] [2021-11-03 05:11:38,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:11:38,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:11:38,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:11:38,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:11:38,060 INFO L87 Difference]: Start difference. First operand 2155 states and 3038 transitions. Second operand has 5 states, 5 states have (on average 50.0) internal successors, (250), 4 states have internal predecessors, (250), 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 05:11:38,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:11:38,433 INFO L93 Difference]: Finished difference Result 6247 states and 8785 transitions. [2021-11-03 05:11:38,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:11:38,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 50.0) internal successors, (250), 4 states have internal predecessors, (250), 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 250 [2021-11-03 05:11:38,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:11:38,458 INFO L225 Difference]: With dead ends: 6247 [2021-11-03 05:11:38,458 INFO L226 Difference]: Without dead ends: 4107 [2021-11-03 05:11:38,466 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 05:11:38,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2021-11-03 05:11:38,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 4105. [2021-11-03 05:11:38,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4105 states, 4104 states have (on average 1.3969298245614035) internal successors, (5733), 4104 states have internal predecessors, (5733), 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 05:11:38,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 5733 transitions. [2021-11-03 05:11:38,803 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 5733 transitions. Word has length 250 [2021-11-03 05:11:38,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:11:38,805 INFO L470 AbstractCegarLoop]: Abstraction has 4105 states and 5733 transitions. [2021-11-03 05:11:38,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 50.0) internal successors, (250), 4 states have internal predecessors, (250), 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 05:11:38,805 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 5733 transitions. [2021-11-03 05:11:38,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-03 05:11:38,815 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:11:38,816 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, 1, 1, 1, 1, 1, 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 05:11:38,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 05:11:38,816 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:11:38,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:11:38,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1649582662, now seen corresponding path program 1 times [2021-11-03 05:11:38,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:11:38,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802903219] [2021-11-03 05:11:38,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:11:38,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:11:39,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:11:39,283 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 05:11:39,284 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:11:39,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802903219] [2021-11-03 05:11:39,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802903219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:11:39,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:11:39,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:11:39,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805140777] [2021-11-03 05:11:39,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:11:39,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:11:39,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:11:39,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:11:39,287 INFO L87 Difference]: Start difference. First operand 4105 states and 5733 transitions. Second operand has 4 states, 4 states have (on average 62.75) internal successors, (251), 3 states have internal predecessors, (251), 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 05:11:39,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:11:39,985 INFO L93 Difference]: Finished difference Result 11991 states and 16714 transitions. [2021-11-03 05:11:39,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:11:39,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.75) internal successors, (251), 3 states have internal predecessors, (251), 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 251 [2021-11-03 05:11:39,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:11:40,029 INFO L225 Difference]: With dead ends: 11991 [2021-11-03 05:11:40,030 INFO L226 Difference]: Without dead ends: 8024 [2021-11-03 05:11:40,036 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 05:11:40,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8024 states. [2021-11-03 05:11:40,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8024 to 8022. [2021-11-03 05:11:40,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8022 states, 8021 states have (on average 1.387732202967211) internal successors, (11131), 8021 states have internal predecessors, (11131), 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 05:11:40,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8022 states to 8022 states and 11131 transitions. [2021-11-03 05:11:40,748 INFO L78 Accepts]: Start accepts. Automaton has 8022 states and 11131 transitions. Word has length 251 [2021-11-03 05:11:40,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:11:40,750 INFO L470 AbstractCegarLoop]: Abstraction has 8022 states and 11131 transitions. [2021-11-03 05:11:40,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.75) internal successors, (251), 3 states have internal predecessors, (251), 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 05:11:40,751 INFO L276 IsEmpty]: Start isEmpty. Operand 8022 states and 11131 transitions. [2021-11-03 05:11:40,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-03 05:11:40,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:11:40,772 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, 1, 1, 1, 1, 1, 1, 1, 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 05:11:40,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 05:11:40,772 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:11:40,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:11:40,773 INFO L85 PathProgramCache]: Analyzing trace with hash -930824097, now seen corresponding path program 1 times [2021-11-03 05:11:40,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:11:40,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521300067] [2021-11-03 05:11:40,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:11:40,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:11:41,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:11:41,140 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 05:11:41,140 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:11:41,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521300067] [2021-11-03 05:11:41,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521300067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:11:41,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:11:41,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:11:41,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639211188] [2021-11-03 05:11:41,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:11:41,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:11:41,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:11:41,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:11:41,144 INFO L87 Difference]: Start difference. First operand 8022 states and 11131 transitions. Second operand has 4 states, 4 states have (on average 63.25) internal successors, (253), 3 states have internal predecessors, (253), 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 05:11:42,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:11:42,399 INFO L93 Difference]: Finished difference Result 23526 states and 32584 transitions. [2021-11-03 05:11:42,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:11:42,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 63.25) internal successors, (253), 3 states have internal predecessors, (253), 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 253 [2021-11-03 05:11:42,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:11:42,465 INFO L225 Difference]: With dead ends: 23526 [2021-11-03 05:11:42,465 INFO L226 Difference]: Without dead ends: 15646 [2021-11-03 05:11:42,480 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 05:11:42,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15646 states. [2021-11-03 05:11:43,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15646 to 15644. [2021-11-03 05:11:43,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15644 states, 15643 states have (on average 1.376206609985297) internal successors, (21528), 15643 states have internal predecessors, (21528), 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 05:11:43,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15644 states to 15644 states and 21528 transitions. [2021-11-03 05:11:43,657 INFO L78 Accepts]: Start accepts. Automaton has 15644 states and 21528 transitions. Word has length 253 [2021-11-03 05:11:43,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:11:43,657 INFO L470 AbstractCegarLoop]: Abstraction has 15644 states and 21528 transitions. [2021-11-03 05:11:43,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.25) internal successors, (253), 3 states have internal predecessors, (253), 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 05:11:43,659 INFO L276 IsEmpty]: Start isEmpty. Operand 15644 states and 21528 transitions. [2021-11-03 05:11:43,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-03 05:11:43,691 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:11:43,692 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:11:43,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 05:11:43,692 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:11:43,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:11:43,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1034061933, now seen corresponding path program 1 times [2021-11-03 05:11:43,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:11:43,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488356636] [2021-11-03 05:11:43,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:11:43,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:11:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:11:43,787 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 05:11:43,787 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:11:43,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488356636] [2021-11-03 05:11:43,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488356636] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:11:43,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:11:43,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:11:43,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189425436] [2021-11-03 05:11:43,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:11:43,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:11:43,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:11:43,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:11:43,790 INFO L87 Difference]: Start difference. First operand 15644 states and 21528 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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 05:11:45,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:11:45,685 INFO L93 Difference]: Finished difference Result 44727 states and 61233 transitions. [2021-11-03 05:11:45,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:11:45,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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 255 [2021-11-03 05:11:45,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:11:45,761 INFO L225 Difference]: With dead ends: 44727 [2021-11-03 05:11:45,762 INFO L226 Difference]: Without dead ends: 30645 [2021-11-03 05:11:45,785 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 05:11:45,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30645 states. [2021-11-03 05:11:47,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30645 to 30643. [2021-11-03 05:11:47,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30643 states, 30642 states have (on average 1.368546439527446) internal successors, (41935), 30642 states have internal predecessors, (41935), 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 05:11:47,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30643 states to 30643 states and 41935 transitions. [2021-11-03 05:11:47,717 INFO L78 Accepts]: Start accepts. Automaton has 30643 states and 41935 transitions. Word has length 255 [2021-11-03 05:11:47,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:11:47,717 INFO L470 AbstractCegarLoop]: Abstraction has 30643 states and 41935 transitions. [2021-11-03 05:11:47,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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 05:11:47,718 INFO L276 IsEmpty]: Start isEmpty. Operand 30643 states and 41935 transitions. [2021-11-03 05:11:47,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-03 05:11:47,777 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:11:47,777 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:11:47,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 05:11:47,778 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:11:47,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:11:47,779 INFO L85 PathProgramCache]: Analyzing trace with hash 417771650, now seen corresponding path program 1 times [2021-11-03 05:11:47,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:11:47,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520295606] [2021-11-03 05:11:47,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:11:47,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:11:47,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:11:47,840 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 05:11:47,840 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:11:47,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520295606] [2021-11-03 05:11:47,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520295606] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:11:47,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:11:47,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:11:47,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831963261] [2021-11-03 05:11:47,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:11:47,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:11:47,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:11:47,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:11:47,843 INFO L87 Difference]: Start difference. First operand 30643 states and 41935 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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 05:11:50,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:11:50,392 INFO L93 Difference]: Finished difference Result 89994 states and 122923 transitions. [2021-11-03 05:11:50,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:11:50,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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 255 [2021-11-03 05:11:50,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:11:50,533 INFO L225 Difference]: With dead ends: 89994 [2021-11-03 05:11:50,533 INFO L226 Difference]: Without dead ends: 61037 [2021-11-03 05:11:50,575 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 05:11:50,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61037 states. [2021-11-03 05:11:52,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61037 to 30676. [2021-11-03 05:11:52,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30676 states, 30675 states have (on average 1.3681499592502038) internal successors, (41968), 30675 states have internal predecessors, (41968), 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 05:11:52,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30676 states to 30676 states and 41968 transitions. [2021-11-03 05:11:52,566 INFO L78 Accepts]: Start accepts. Automaton has 30676 states and 41968 transitions. Word has length 255 [2021-11-03 05:11:52,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:11:52,567 INFO L470 AbstractCegarLoop]: Abstraction has 30676 states and 41968 transitions. [2021-11-03 05:11:52,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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 05:11:52,567 INFO L276 IsEmpty]: Start isEmpty. Operand 30676 states and 41968 transitions. [2021-11-03 05:11:52,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-03 05:11:52,642 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:11:52,643 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:11:52,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 05:11:52,643 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:11:52,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:11:52,644 INFO L85 PathProgramCache]: Analyzing trace with hash -635670694, now seen corresponding path program 1 times [2021-11-03 05:11:52,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:11:52,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557011201] [2021-11-03 05:11:52,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:11:52,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:11:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:11:53,261 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 05:11:53,261 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:11:53,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557011201] [2021-11-03 05:11:53,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557011201] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:11:53,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:11:53,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:11:53,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405370600] [2021-11-03 05:11:53,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:11:53,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:11:53,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:11:53,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:11:53,268 INFO L87 Difference]: Start difference. First operand 30676 states and 41968 transitions. Second operand has 5 states, 5 states have (on average 51.2) internal successors, (256), 4 states have internal predecessors, (256), 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 05:11:56,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:11:56,643 INFO L93 Difference]: Finished difference Result 89063 states and 121503 transitions. [2021-11-03 05:11:56,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:11:56,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 51.2) internal successors, (256), 4 states have internal predecessors, (256), 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 256 [2021-11-03 05:11:56,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:11:56,745 INFO L225 Difference]: With dead ends: 89063 [2021-11-03 05:11:56,745 INFO L226 Difference]: Without dead ends: 58587 [2021-11-03 05:11:56,781 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 05:11:56,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58587 states. [2021-11-03 05:11:59,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58587 to 58585. [2021-11-03 05:11:59,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58585 states, 58584 states have (on average 1.356530793390687) internal successors, (79471), 58584 states have internal predecessors, (79471), 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 05:12:00,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58585 states to 58585 states and 79471 transitions. [2021-11-03 05:12:00,035 INFO L78 Accepts]: Start accepts. Automaton has 58585 states and 79471 transitions. Word has length 256 [2021-11-03 05:12:00,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:00,036 INFO L470 AbstractCegarLoop]: Abstraction has 58585 states and 79471 transitions. [2021-11-03 05:12:00,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 51.2) internal successors, (256), 4 states have internal predecessors, (256), 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 05:12:00,036 INFO L276 IsEmpty]: Start isEmpty. Operand 58585 states and 79471 transitions. [2021-11-03 05:12:00,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-11-03 05:12:00,121 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:00,122 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:12:00,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 05:12:00,122 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:12:00,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:00,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1953799716, now seen corresponding path program 1 times [2021-11-03 05:12:00,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:12:00,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950131367] [2021-11-03 05:12:00,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:00,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:12:00,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:00,506 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 05:12:00,506 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:12:00,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950131367] [2021-11-03 05:12:00,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950131367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:00,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:12:00,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:12:00,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724325909] [2021-11-03 05:12:00,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:12:00,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:12:00,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:12:00,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:12:00,510 INFO L87 Difference]: Start difference. First operand 58585 states and 79471 transitions. Second operand has 4 states, 4 states have (on average 64.25) internal successors, (257), 3 states have internal predecessors, (257), 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 05:12:06,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:06,686 INFO L93 Difference]: Finished difference Result 170939 states and 231247 transitions. [2021-11-03 05:12:06,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:12:06,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 64.25) internal successors, (257), 3 states have internal predecessors, (257), 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 257 [2021-11-03 05:12:06,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:06,885 INFO L225 Difference]: With dead ends: 170939 [2021-11-03 05:12:06,885 INFO L226 Difference]: Without dead ends: 114618 [2021-11-03 05:12:06,936 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 05:12:07,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114618 states. [2021-11-03 05:12:13,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114618 to 114616. [2021-11-03 05:12:14,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114616 states, 114615 states have (on average 1.3484622431618898) internal successors, (154554), 114615 states have internal predecessors, (154554), 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 05:12:14,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114616 states to 114616 states and 154554 transitions. [2021-11-03 05:12:14,319 INFO L78 Accepts]: Start accepts. Automaton has 114616 states and 154554 transitions. Word has length 257 [2021-11-03 05:12:14,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:14,319 INFO L470 AbstractCegarLoop]: Abstraction has 114616 states and 154554 transitions. [2021-11-03 05:12:14,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.25) internal successors, (257), 3 states have internal predecessors, (257), 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 05:12:14,320 INFO L276 IsEmpty]: Start isEmpty. Operand 114616 states and 154554 transitions. [2021-11-03 05:12:14,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-03 05:12:14,508 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:14,508 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:12:14,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 05:12:14,509 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:12:14,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:14,510 INFO L85 PathProgramCache]: Analyzing trace with hash 939188816, now seen corresponding path program 1 times [2021-11-03 05:12:14,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:12:14,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977858280] [2021-11-03 05:12:14,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:14,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:12:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:15,172 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 05:12:15,172 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:12:15,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977858280] [2021-11-03 05:12:15,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977858280] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:15,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:12:15,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:12:15,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999991670] [2021-11-03 05:12:15,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:12:15,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:12:15,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:12:15,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:12:15,176 INFO L87 Difference]: Start difference. First operand 114616 states and 154554 transitions. Second operand has 4 states, 4 states have (on average 64.75) internal successors, (259), 3 states have internal predecessors, (259), 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)