./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb14583-e9e8-4fcd-be50-9ff67913dfcf/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb14583-e9e8-4fcd-be50-9ff67913dfcf/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb14583-e9e8-4fcd-be50-9ff67913dfcf/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb14583-e9e8-4fcd-be50-9ff67913dfcf/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb14583-e9e8-4fcd-be50-9ff67913dfcf/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb14583-e9e8-4fcd-be50-9ff67913dfcf/bin/utaipan-EQgc7hIp5V --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 54dd2c42579f0de559de8ea2b74ae8f2f84f80b7530dd7d24e9994fd7ce14291 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:37:15,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:37:15,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:37:15,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:37:15,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:37:15,488 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:37:15,490 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:37:15,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:37:15,500 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:37:15,509 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:37:15,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:37:15,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:37:15,515 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:37:15,518 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:37:15,521 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:37:15,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:37:15,529 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:37:15,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:37:15,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:37:15,541 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:37:15,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:37:15,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:37:15,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:37:15,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:37:15,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:37:15,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:37:15,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:37:15,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:37:15,570 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:37:15,572 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:37:15,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:37:15,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:37:15,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:37:15,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:37:15,581 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:37:15,581 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:37:15,582 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:37:15,582 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:37:15,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:37:15,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:37:15,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:37:15,586 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb14583-e9e8-4fcd-be50-9ff67913dfcf/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:37:15,643 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:37:15,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:37:15,645 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:37:15,645 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:37:15,654 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:37:15,654 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:37:15,655 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:37:15,655 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:37:15,655 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:37:15,656 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:37:15,657 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:37:15,657 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:37:15,658 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:37:15,658 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:37:15,658 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:37:15,659 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:37:15,659 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:37:15,659 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:37:15,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:37:15,660 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:37:15,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:37:15,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:37:15,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:37:15,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:37:15,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:37:15,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:37:15,664 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:37:15,665 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:37:15,665 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:37:15,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:37:15,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:37:15,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:37:15,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:37:15,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:37:15,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:37:15,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:37:15,668 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:37:15,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:37:15,668 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:37:15,669 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:37:15,669 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:37:15,669 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_ddb14583-e9e8-4fcd-be50-9ff67913dfcf/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb14583-e9e8-4fcd-be50-9ff67913dfcf/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54dd2c42579f0de559de8ea2b74ae8f2f84f80b7530dd7d24e9994fd7ce14291 [2021-11-23 02:37:15,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:37:16,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:37:16,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:37:16,016 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:37:16,017 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:37:16,019 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb14583-e9e8-4fcd-be50-9ff67913dfcf/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-23 02:37:16,123 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb14583-e9e8-4fcd-be50-9ff67913dfcf/bin/utaipan-EQgc7hIp5V/data/20101bdcf/0ce18811468f49e8b6ad25c385a8f8da/FLAG74a981093 [2021-11-23 02:37:16,715 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:37:16,716 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb14583-e9e8-4fcd-be50-9ff67913dfcf/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-23 02:37:16,732 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb14583-e9e8-4fcd-be50-9ff67913dfcf/bin/utaipan-EQgc7hIp5V/data/20101bdcf/0ce18811468f49e8b6ad25c385a8f8da/FLAG74a981093 [2021-11-23 02:37:17,008 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb14583-e9e8-4fcd-be50-9ff67913dfcf/bin/utaipan-EQgc7hIp5V/data/20101bdcf/0ce18811468f49e8b6ad25c385a8f8da [2021-11-23 02:37:17,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:37:17,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:37:17,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:37:17,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:37:17,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:37:17,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:37:17" (1/1) ... [2021-11-23 02:37:17,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10485185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:17, skipping insertion in model container [2021-11-23 02:37:17,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:37:17" (1/1) ... [2021-11-23 02:37:17,052 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:37:17,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:37:17,458 WARN L230 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_ddb14583-e9e8-4fcd-be50-9ff67913dfcf/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7253,7266] [2021-11-23 02:37:17,613 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:37:17,631 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:37:17,709 WARN L230 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_ddb14583-e9e8-4fcd-be50-9ff67913dfcf/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7253,7266] [2021-11-23 02:37:17,761 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:37:17,783 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:37:17,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:17 WrapperNode [2021-11-23 02:37:17,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:37:17,791 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:37:17,792 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:37:17,792 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:37:17,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:17" (1/1) ... [2021-11-23 02:37:17,832 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:17" (1/1) ... [2021-11-23 02:37:17,903 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 675 [2021-11-23 02:37:17,914 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:37:17,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:37:17,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:37:17,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:37:17,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:17" (1/1) ... [2021-11-23 02:37:17,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:17" (1/1) ... [2021-11-23 02:37:17,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:17" (1/1) ... [2021-11-23 02:37:17,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:17" (1/1) ... [2021-11-23 02:37:17,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:17" (1/1) ... [2021-11-23 02:37:17,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:17" (1/1) ... [2021-11-23 02:37:17,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:17" (1/1) ... [2021-11-23 02:37:18,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:37:18,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:37:18,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:37:18,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:37:18,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:17" (1/1) ... [2021-11-23 02:37:18,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:37:18,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb14583-e9e8-4fcd-be50-9ff67913dfcf/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:37:18,048 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb14583-e9e8-4fcd-be50-9ff67913dfcf/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:37:18,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb14583-e9e8-4fcd-be50-9ff67913dfcf/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:37:18,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:37:18,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:37:18,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:37:18,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:37:18,209 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:37:18,211 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:37:19,075 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:37:19,283 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:37:19,283 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:37:19,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:37:19 BoogieIcfgContainer [2021-11-23 02:37:19,287 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:37:19,289 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:37:19,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:37:19,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:37:19,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:37:17" (1/3) ... [2021-11-23 02:37:19,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b618545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:37:19, skipping insertion in model container [2021-11-23 02:37:19,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:17" (2/3) ... [2021-11-23 02:37:19,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b618545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:37:19, skipping insertion in model container [2021-11-23 02:37:19,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:37:19" (3/3) ... [2021-11-23 02:37:19,298 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-23 02:37:19,312 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:37:19,312 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:37:19,375 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:37:19,384 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 [2021-11-23 02:37:19,384 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:37:19,407 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 132 states have (on average 1.7045454545454546) internal successors, (225), 133 states have internal predecessors, (225), 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) [2021-11-23 02:37:19,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 02:37:19,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:19,419 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:37:19,420 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:37:19,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:19,426 INFO L85 PathProgramCache]: Analyzing trace with hash 700378674, now seen corresponding path program 1 times [2021-11-23 02:37:19,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:19,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501352943] [2021-11-23 02:37:19,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:19,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:19,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:20,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:37:20,012 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:20,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501352943] [2021-11-23 02:37:20,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501352943] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:20,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:37:20,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:37:20,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979607844] [2021-11-23 02:37:20,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:20,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:37:20,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:20,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:37:20,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:37:20,084 INFO L87 Difference]: Start difference. First operand has 134 states, 132 states have (on average 1.7045454545454546) internal successors, (225), 133 states have internal predecessors, (225), 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 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:20,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:20,398 INFO L93 Difference]: Finished difference Result 406 states and 650 transitions. [2021-11-23 02:37:20,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:37:20,402 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-23 02:37:20,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:20,419 INFO L225 Difference]: With dead ends: 406 [2021-11-23 02:37:20,419 INFO L226 Difference]: Without dead ends: 324 [2021-11-23 02:37:20,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:37:20,428 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 809 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:20,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [809 Valid, 644 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:37:20,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-11-23 02:37:20,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 318. [2021-11-23 02:37:20,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 1.384858044164038) internal successors, (439), 317 states have internal predecessors, (439), 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) [2021-11-23 02:37:20,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 439 transitions. [2021-11-23 02:37:20,520 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 439 transitions. Word has length 54 [2021-11-23 02:37:20,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:20,521 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 439 transitions. [2021-11-23 02:37:20,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:20,521 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 439 transitions. [2021-11-23 02:37:20,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 02:37:20,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:20,525 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:37:20,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:37:20,526 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:37:20,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:20,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1332687756, now seen corresponding path program 1 times [2021-11-23 02:37:20,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:20,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300308874] [2021-11-23 02:37:20,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:20,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:37:20,674 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:20,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300308874] [2021-11-23 02:37:20,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300308874] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:20,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:37:20,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:37:20,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491575333] [2021-11-23 02:37:20,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:20,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:37:20,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:20,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:37:20,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:37:20,683 INFO L87 Difference]: Start difference. First operand 318 states and 439 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:21,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:21,061 INFO L93 Difference]: Finished difference Result 764 states and 1085 transitions. [2021-11-23 02:37:21,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:37:21,063 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-23 02:37:21,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:21,070 INFO L225 Difference]: With dead ends: 764 [2021-11-23 02:37:21,070 INFO L226 Difference]: Without dead ends: 496 [2021-11-23 02:37:21,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:37:21,084 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 466 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:21,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 188 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:37:21,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-11-23 02:37:21,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 494. [2021-11-23 02:37:21,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 1.4137931034482758) internal successors, (697), 493 states have internal predecessors, (697), 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) [2021-11-23 02:37:21,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 697 transitions. [2021-11-23 02:37:21,216 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 697 transitions. Word has length 55 [2021-11-23 02:37:21,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:21,222 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 697 transitions. [2021-11-23 02:37:21,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:21,223 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 697 transitions. [2021-11-23 02:37:21,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 02:37:21,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:21,236 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:37:21,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:37:21,237 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:37:21,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:21,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1650750162, now seen corresponding path program 1 times [2021-11-23 02:37:21,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:21,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619254284] [2021-11-23 02:37:21,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:21,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:37:21,429 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:21,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619254284] [2021-11-23 02:37:21,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619254284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:21,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:37:21,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:37:21,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901678707] [2021-11-23 02:37:21,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:21,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:37:21,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:21,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:37:21,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:37:21,436 INFO L87 Difference]: Start difference. First operand 494 states and 697 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:21,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:21,810 INFO L93 Difference]: Finished difference Result 1242 states and 1795 transitions. [2021-11-23 02:37:21,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:37:21,811 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-23 02:37:21,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:21,817 INFO L225 Difference]: With dead ends: 1242 [2021-11-23 02:37:21,818 INFO L226 Difference]: Without dead ends: 848 [2021-11-23 02:37:21,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:37:21,821 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 438 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:21,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 204 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:37:21,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2021-11-23 02:37:21,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 846. [2021-11-23 02:37:21,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 1.4355029585798817) internal successors, (1213), 845 states have internal predecessors, (1213), 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) [2021-11-23 02:37:21,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1213 transitions. [2021-11-23 02:37:21,911 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1213 transitions. Word has length 55 [2021-11-23 02:37:21,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:21,912 INFO L470 AbstractCegarLoop]: Abstraction has 846 states and 1213 transitions. [2021-11-23 02:37:21,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:21,912 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1213 transitions. [2021-11-23 02:37:21,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 02:37:21,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:21,914 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:37:21,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:37:21,915 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:37:21,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:21,915 INFO L85 PathProgramCache]: Analyzing trace with hash -930562429, now seen corresponding path program 1 times [2021-11-23 02:37:21,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:21,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072822714] [2021-11-23 02:37:21,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:21,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:37:22,021 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:22,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072822714] [2021-11-23 02:37:22,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072822714] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:22,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:37:22,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:37:22,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608151658] [2021-11-23 02:37:22,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:22,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:37:22,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:22,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:37:22,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:37:22,024 INFO L87 Difference]: Start difference. First operand 846 states and 1213 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:22,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:22,457 INFO L93 Difference]: Finished difference Result 2325 states and 3384 transitions. [2021-11-23 02:37:22,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:37:22,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-23 02:37:22,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:22,471 INFO L225 Difference]: With dead ends: 2325 [2021-11-23 02:37:22,471 INFO L226 Difference]: Without dead ends: 1552 [2021-11-23 02:37:22,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:37:22,485 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 443 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:22,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 196 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:37:22,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2021-11-23 02:37:22,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1550. [2021-11-23 02:37:22,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 1.4441575209812783) internal successors, (2237), 1549 states have internal predecessors, (2237), 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) [2021-11-23 02:37:22,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 2237 transitions. [2021-11-23 02:37:22,661 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 2237 transitions. Word has length 55 [2021-11-23 02:37:22,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:22,664 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 2237 transitions. [2021-11-23 02:37:22,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:22,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 2237 transitions. [2021-11-23 02:37:22,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 02:37:22,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:22,667 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:37:22,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:37:22,668 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:37:22,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:22,669 INFO L85 PathProgramCache]: Analyzing trace with hash -275637083, now seen corresponding path program 1 times [2021-11-23 02:37:22,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:22,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367907664] [2021-11-23 02:37:22,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:22,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:37:22,843 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:22,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367907664] [2021-11-23 02:37:22,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367907664] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:22,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:37:22,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:37:22,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203310643] [2021-11-23 02:37:22,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:22,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:37:22,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:22,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:37:22,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:37:22,849 INFO L87 Difference]: Start difference. First operand 1550 states and 2237 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:23,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:23,396 INFO L93 Difference]: Finished difference Result 4172 states and 6061 transitions. [2021-11-23 02:37:23,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:37:23,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-23 02:37:23,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:23,417 INFO L225 Difference]: With dead ends: 4172 [2021-11-23 02:37:23,418 INFO L226 Difference]: Without dead ends: 2656 [2021-11-23 02:37:23,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:37:23,422 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 459 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:23,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 180 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:37:23,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-11-23 02:37:23,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2654. [2021-11-23 02:37:23,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2654 states, 2653 states have (on average 1.4364869958537505) internal successors, (3811), 2653 states have internal predecessors, (3811), 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) [2021-11-23 02:37:23,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3811 transitions. [2021-11-23 02:37:23,755 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3811 transitions. Word has length 55 [2021-11-23 02:37:23,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:23,758 INFO L470 AbstractCegarLoop]: Abstraction has 2654 states and 3811 transitions. [2021-11-23 02:37:23,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:23,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3811 transitions. [2021-11-23 02:37:23,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 02:37:23,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:23,763 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:37:23,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:37:23,764 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:37:23,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:23,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1708398918, now seen corresponding path program 1 times [2021-11-23 02:37:23,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:23,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337561155] [2021-11-23 02:37:23,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:23,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:23,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:37:24,788 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:24,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337561155] [2021-11-23 02:37:24,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337561155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:24,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:37:24,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-23 02:37:24,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470466755] [2021-11-23 02:37:24,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:24,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 02:37:24,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:24,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 02:37:24,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:37:24,791 INFO L87 Difference]: Start difference. First operand 2654 states and 3811 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:26,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:26,608 INFO L93 Difference]: Finished difference Result 6136 states and 8815 transitions. [2021-11-23 02:37:26,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 02:37:26,609 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-23 02:37:26,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:26,642 INFO L225 Difference]: With dead ends: 6136 [2021-11-23 02:37:26,642 INFO L226 Difference]: Without dead ends: 4582 [2021-11-23 02:37:26,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2021-11-23 02:37:26,647 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 769 mSDsluCounter, 1330 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 1491 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:26,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 1491 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 02:37:26,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2021-11-23 02:37:27,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 3700. [2021-11-23 02:37:27,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3700 states, 3699 states have (on average 1.4257907542579076) internal successors, (5274), 3699 states have internal predecessors, (5274), 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) [2021-11-23 02:37:27,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3700 states to 3700 states and 5274 transitions. [2021-11-23 02:37:27,221 INFO L78 Accepts]: Start accepts. Automaton has 3700 states and 5274 transitions. Word has length 56 [2021-11-23 02:37:27,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:27,222 INFO L470 AbstractCegarLoop]: Abstraction has 3700 states and 5274 transitions. [2021-11-23 02:37:27,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:27,222 INFO L276 IsEmpty]: Start isEmpty. Operand 3700 states and 5274 transitions. [2021-11-23 02:37:27,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 02:37:27,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:27,224 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:37:27,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:37:27,225 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:37:27,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:27,225 INFO L85 PathProgramCache]: Analyzing trace with hash -9242362, now seen corresponding path program 1 times [2021-11-23 02:37:27,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:27,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654578404] [2021-11-23 02:37:27,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:27,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:27,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:37:27,999 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:27,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654578404] [2021-11-23 02:37:27,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654578404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:28,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:37:28,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-23 02:37:28,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165380295] [2021-11-23 02:37:28,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:28,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 02:37:28,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:28,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 02:37:28,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-23 02:37:28,002 INFO L87 Difference]: Start difference. First operand 3700 states and 5274 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:29,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:29,631 INFO L93 Difference]: Finished difference Result 4385 states and 6224 transitions. [2021-11-23 02:37:29,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 02:37:29,632 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-23 02:37:29,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:29,667 INFO L225 Difference]: With dead ends: 4385 [2021-11-23 02:37:29,667 INFO L226 Difference]: Without dead ends: 4383 [2021-11-23 02:37:29,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-11-23 02:37:29,670 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 851 mSDsluCounter, 1691 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 1914 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:29,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 1914 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 02:37:29,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4383 states. [2021-11-23 02:37:30,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4383 to 4120. [2021-11-23 02:37:30,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4120 states, 4119 states have (on average 1.4238892935178442) internal successors, (5865), 4119 states have internal predecessors, (5865), 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) [2021-11-23 02:37:30,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4120 states to 4120 states and 5865 transitions. [2021-11-23 02:37:30,174 INFO L78 Accepts]: Start accepts. Automaton has 4120 states and 5865 transitions. Word has length 56 [2021-11-23 02:37:30,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:30,176 INFO L470 AbstractCegarLoop]: Abstraction has 4120 states and 5865 transitions. [2021-11-23 02:37:30,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:30,176 INFO L276 IsEmpty]: Start isEmpty. Operand 4120 states and 5865 transitions. [2021-11-23 02:37:30,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 02:37:30,178 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:30,178 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:37:30,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:37:30,178 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:37:30,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:30,180 INFO L85 PathProgramCache]: Analyzing trace with hash 352118054, now seen corresponding path program 1 times [2021-11-23 02:37:30,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:30,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603697659] [2021-11-23 02:37:30,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:30,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:37:30,939 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:30,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603697659] [2021-11-23 02:37:30,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603697659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:30,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:37:30,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-23 02:37:30,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428734163] [2021-11-23 02:37:30,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:30,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 02:37:30,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:30,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 02:37:30,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-23 02:37:30,942 INFO L87 Difference]: Start difference. First operand 4120 states and 5865 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:32,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:32,575 INFO L93 Difference]: Finished difference Result 6210 states and 8839 transitions. [2021-11-23 02:37:32,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 02:37:32,576 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-23 02:37:32,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:32,616 INFO L225 Difference]: With dead ends: 6210 [2021-11-23 02:37:32,616 INFO L226 Difference]: Without dead ends: 5392 [2021-11-23 02:37:32,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-11-23 02:37:32,621 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 757 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 1620 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:32,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [757 Valid, 1620 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 02:37:32,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5392 states. [2021-11-23 02:37:33,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5392 to 4856. [2021-11-23 02:37:33,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4856 states, 4855 states have (on average 1.4218331616889803) internal successors, (6903), 4855 states have internal predecessors, (6903), 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) [2021-11-23 02:37:33,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 6903 transitions. [2021-11-23 02:37:33,240 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 6903 transitions. Word has length 56 [2021-11-23 02:37:33,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:33,241 INFO L470 AbstractCegarLoop]: Abstraction has 4856 states and 6903 transitions. [2021-11-23 02:37:33,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:33,242 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 6903 transitions. [2021-11-23 02:37:33,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 02:37:33,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:33,243 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:37:33,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:37:33,244 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:37:33,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:33,244 INFO L85 PathProgramCache]: Analyzing trace with hash 573085030, now seen corresponding path program 1 times [2021-11-23 02:37:33,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:33,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164165025] [2021-11-23 02:37:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:33,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:34,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:37:34,033 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:34,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164165025] [2021-11-23 02:37:34,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164165025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:34,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:37:34,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-23 02:37:34,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713708848] [2021-11-23 02:37:34,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:34,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 02:37:34,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:34,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 02:37:34,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-23 02:37:34,036 INFO L87 Difference]: Start difference. First operand 4856 states and 6903 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:36,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:36,074 INFO L93 Difference]: Finished difference Result 8753 states and 12508 transitions. [2021-11-23 02:37:36,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 02:37:36,075 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-23 02:37:36,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:36,137 INFO L225 Difference]: With dead ends: 8753 [2021-11-23 02:37:36,137 INFO L226 Difference]: Without dead ends: 8751 [2021-11-23 02:37:36,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2021-11-23 02:37:36,143 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 711 mSDsluCounter, 1800 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 2050 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:36,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 2050 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 02:37:36,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8751 states. [2021-11-23 02:37:36,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8751 to 6985. [2021-11-23 02:37:37,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6985 states, 6984 states have (on average 1.424971363115693) internal successors, (9952), 6984 states have internal predecessors, (9952), 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) [2021-11-23 02:37:37,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6985 states to 6985 states and 9952 transitions. [2021-11-23 02:37:37,042 INFO L78 Accepts]: Start accepts. Automaton has 6985 states and 9952 transitions. Word has length 56 [2021-11-23 02:37:37,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:37,042 INFO L470 AbstractCegarLoop]: Abstraction has 6985 states and 9952 transitions. [2021-11-23 02:37:37,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:37,043 INFO L276 IsEmpty]: Start isEmpty. Operand 6985 states and 9952 transitions. [2021-11-23 02:37:37,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 02:37:37,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:37,045 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:37:37,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:37:37,045 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:37:37,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:37,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1964396774, now seen corresponding path program 1 times [2021-11-23 02:37:37,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:37,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100758048] [2021-11-23 02:37:37,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:37,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:38,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:37:38,335 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:38,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100758048] [2021-11-23 02:37:38,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100758048] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:38,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:37:38,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-23 02:37:38,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978098182] [2021-11-23 02:37:38,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:38,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 02:37:38,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:38,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 02:37:38,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-23 02:37:38,339 INFO L87 Difference]: Start difference. First operand 6985 states and 9952 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:41,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:41,468 INFO L93 Difference]: Finished difference Result 10918 states and 15530 transitions. [2021-11-23 02:37:41,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 02:37:41,469 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-23 02:37:41,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:41,507 INFO L225 Difference]: With dead ends: 10918 [2021-11-23 02:37:41,507 INFO L226 Difference]: Without dead ends: 10916 [2021-11-23 02:37:41,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=405, Invalid=1235, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 02:37:41,513 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 992 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 1599 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 1639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:41,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [992 Valid, 1245 Invalid, 1639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1599 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 02:37:41,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10916 states. [2021-11-23 02:37:42,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10916 to 7007. [2021-11-23 02:37:42,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7007 states, 7006 states have (on average 1.4240650870682272) internal successors, (9977), 7006 states have internal predecessors, (9977), 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) [2021-11-23 02:37:42,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7007 states to 7007 states and 9977 transitions. [2021-11-23 02:37:42,256 INFO L78 Accepts]: Start accepts. Automaton has 7007 states and 9977 transitions. Word has length 58 [2021-11-23 02:37:42,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:42,257 INFO L470 AbstractCegarLoop]: Abstraction has 7007 states and 9977 transitions. [2021-11-23 02:37:42,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:42,257 INFO L276 IsEmpty]: Start isEmpty. Operand 7007 states and 9977 transitions. [2021-11-23 02:37:42,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 02:37:42,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:42,259 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:37:42,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:37:42,259 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:37:42,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:42,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1603036358, now seen corresponding path program 1 times [2021-11-23 02:37:42,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:42,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610597397] [2021-11-23 02:37:42,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:42,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:37:43,009 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:43,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610597397] [2021-11-23 02:37:43,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610597397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:43,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:37:43,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-23 02:37:43,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815723657] [2021-11-23 02:37:43,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:43,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 02:37:43,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:43,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 02:37:43,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:37:43,013 INFO L87 Difference]: Start difference. First operand 7007 states and 9977 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:44,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:44,518 INFO L93 Difference]: Finished difference Result 9107 states and 12961 transitions. [2021-11-23 02:37:44,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 02:37:44,518 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-23 02:37:44,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:44,540 INFO L225 Difference]: With dead ends: 9107 [2021-11-23 02:37:44,541 INFO L226 Difference]: Without dead ends: 8289 [2021-11-23 02:37:44,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2021-11-23 02:37:44,547 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 754 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 1643 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:44,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 1643 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:37:44,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8289 states. [2021-11-23 02:37:45,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8289 to 7004. [2021-11-23 02:37:45,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7004 states, 7003 states have (on average 1.4241039554476653) internal successors, (9973), 7003 states have internal predecessors, (9973), 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) [2021-11-23 02:37:45,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7004 states to 7004 states and 9973 transitions. [2021-11-23 02:37:45,246 INFO L78 Accepts]: Start accepts. Automaton has 7004 states and 9973 transitions. Word has length 58 [2021-11-23 02:37:45,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:45,247 INFO L470 AbstractCegarLoop]: Abstraction has 7004 states and 9973 transitions. [2021-11-23 02:37:45,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:45,247 INFO L276 IsEmpty]: Start isEmpty. Operand 7004 states and 9973 transitions. [2021-11-23 02:37:45,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 02:37:45,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:45,249 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:37:45,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:37:45,249 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:37:45,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:45,250 INFO L85 PathProgramCache]: Analyzing trace with hash 319750906, now seen corresponding path program 1 times [2021-11-23 02:37:45,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:45,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506220395] [2021-11-23 02:37:45,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:45,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:45,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:37:45,942 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:45,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506220395] [2021-11-23 02:37:45,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506220395] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:45,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:37:45,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-23 02:37:45,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543273311] [2021-11-23 02:37:45,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:45,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 02:37:45,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:45,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 02:37:45,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:37:45,944 INFO L87 Difference]: Start difference. First operand 7004 states and 9973 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:47,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:47,532 INFO L93 Difference]: Finished difference Result 8071 states and 11468 transitions. [2021-11-23 02:37:47,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 02:37:47,533 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-23 02:37:47,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:47,559 INFO L225 Difference]: With dead ends: 8071 [2021-11-23 02:37:47,560 INFO L226 Difference]: Without dead ends: 8069 [2021-11-23 02:37:47,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2021-11-23 02:37:47,566 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 594 mSDsluCounter, 1664 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 1888 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:47,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [594 Valid, 1888 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:37:47,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8069 states. [2021-11-23 02:37:48,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8069 to 7017. [2021-11-23 02:37:48,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7017 states, 7016 states have (on average 1.423745724059293) internal successors, (9989), 7016 states have internal predecessors, (9989), 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) [2021-11-23 02:37:48,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7017 states to 7017 states and 9989 transitions. [2021-11-23 02:37:48,296 INFO L78 Accepts]: Start accepts. Automaton has 7017 states and 9989 transitions. Word has length 58 [2021-11-23 02:37:48,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:48,297 INFO L470 AbstractCegarLoop]: Abstraction has 7017 states and 9989 transitions. [2021-11-23 02:37:48,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:48,298 INFO L276 IsEmpty]: Start isEmpty. Operand 7017 states and 9989 transitions. [2021-11-23 02:37:48,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 02:37:48,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:48,300 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:37:48,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:37:48,300 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:37:48,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:48,301 INFO L85 PathProgramCache]: Analyzing trace with hash -361708678, now seen corresponding path program 1 times [2021-11-23 02:37:48,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:48,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954657497] [2021-11-23 02:37:48,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:48,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:49,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:37:49,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:49,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954657497] [2021-11-23 02:37:49,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954657497] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:49,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:37:49,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-23 02:37:49,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965292723] [2021-11-23 02:37:49,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:49,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 02:37:49,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:49,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 02:37:49,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:37:49,122 INFO L87 Difference]: Start difference. First operand 7017 states and 9989 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:50,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:50,828 INFO L93 Difference]: Finished difference Result 10483 states and 14971 transitions. [2021-11-23 02:37:50,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 02:37:50,829 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-23 02:37:50,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:50,852 INFO L225 Difference]: With dead ends: 10483 [2021-11-23 02:37:50,852 INFO L226 Difference]: Without dead ends: 8929 [2021-11-23 02:37:50,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2021-11-23 02:37:50,863 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 611 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:50,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 999 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:37:50,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8929 states. [2021-11-23 02:37:51,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8929 to 7010. [2021-11-23 02:37:51,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7010 states, 7009 states have (on average 1.4238835782565273) internal successors, (9980), 7009 states have internal predecessors, (9980), 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) [2021-11-23 02:37:51,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7010 states to 7010 states and 9980 transitions. [2021-11-23 02:37:51,749 INFO L78 Accepts]: Start accepts. Automaton has 7010 states and 9980 transitions. Word has length 58 [2021-11-23 02:37:51,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:51,750 INFO L470 AbstractCegarLoop]: Abstraction has 7010 states and 9980 transitions. [2021-11-23 02:37:51,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:51,750 INFO L276 IsEmpty]: Start isEmpty. Operand 7010 states and 9980 transitions. [2021-11-23 02:37:51,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 02:37:51,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:51,752 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:37:51,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:37:51,752 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:37:51,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:51,753 INFO L85 PathProgramCache]: Analyzing trace with hash -2079349958, now seen corresponding path program 1 times [2021-11-23 02:37:51,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:51,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297030614] [2021-11-23 02:37:51,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:51,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:37:52,490 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:52,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297030614] [2021-11-23 02:37:52,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297030614] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:52,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:37:52,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-23 02:37:52,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178503255] [2021-11-23 02:37:52,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:52,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 02:37:52,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:52,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 02:37:52,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:37:52,493 INFO L87 Difference]: Start difference. First operand 7010 states and 9980 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:55,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:55,133 INFO L93 Difference]: Finished difference Result 12840 states and 18318 transitions. [2021-11-23 02:37:55,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 02:37:55,134 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-23 02:37:55,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:55,165 INFO L225 Difference]: With dead ends: 12840 [2021-11-23 02:37:55,166 INFO L226 Difference]: Without dead ends: 12838 [2021-11-23 02:37:55,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2021-11-23 02:37:55,171 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 882 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:55,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [882 Valid, 1608 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 02:37:55,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12838 states. [2021-11-23 02:37:55,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12838 to 7016. [2021-11-23 02:37:55,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7016 states, 7015 states have (on average 1.4236635780470421) internal successors, (9987), 7015 states have internal predecessors, (9987), 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) [2021-11-23 02:37:55,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7016 states to 7016 states and 9987 transitions. [2021-11-23 02:37:55,986 INFO L78 Accepts]: Start accepts. Automaton has 7016 states and 9987 transitions. Word has length 58 [2021-11-23 02:37:55,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:55,987 INFO L470 AbstractCegarLoop]: Abstraction has 7016 states and 9987 transitions. [2021-11-23 02:37:55,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:55,987 INFO L276 IsEmpty]: Start isEmpty. Operand 7016 states and 9987 transitions. [2021-11-23 02:37:55,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 02:37:55,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:55,989 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:37:55,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 02:37:55,989 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:37:55,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:55,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1717989542, now seen corresponding path program 1 times [2021-11-23 02:37:55,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:55,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073950850] [2021-11-23 02:37:55,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:55,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:37:56,670 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:56,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073950850] [2021-11-23 02:37:56,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073950850] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:56,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:37:56,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-23 02:37:56,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714132313] [2021-11-23 02:37:56,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:56,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 02:37:56,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:56,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 02:37:56,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:37:56,673 INFO L87 Difference]: Start difference. First operand 7016 states and 9987 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:58,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:58,511 INFO L93 Difference]: Finished difference Result 14630 states and 20889 transitions. [2021-11-23 02:37:58,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 02:37:58,512 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-23 02:37:58,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:58,537 INFO L225 Difference]: With dead ends: 14630 [2021-11-23 02:37:58,538 INFO L226 Difference]: Without dead ends: 12996 [2021-11-23 02:37:58,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2021-11-23 02:37:58,547 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 560 mSDsluCounter, 1357 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1603 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:58,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 1603 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:37:58,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12996 states. [2021-11-23 02:37:59,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12996 to 8373. [2021-11-23 02:37:59,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8373 states, 8372 states have (on average 1.4220019111323459) internal successors, (11905), 8372 states have internal predecessors, (11905), 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) [2021-11-23 02:37:59,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8373 states to 8373 states and 11905 transitions. [2021-11-23 02:37:59,610 INFO L78 Accepts]: Start accepts. Automaton has 8373 states and 11905 transitions. Word has length 58 [2021-11-23 02:37:59,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:59,611 INFO L470 AbstractCegarLoop]: Abstraction has 8373 states and 11905 transitions. [2021-11-23 02:37:59,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:37:59,612 INFO L276 IsEmpty]: Start isEmpty. Operand 8373 states and 11905 transitions. [2021-11-23 02:37:59,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-23 02:37:59,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:59,613 INFO L514 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] [2021-11-23 02:37:59,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 02:37:59,614 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:37:59,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:59,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1222037503, now seen corresponding path program 1 times [2021-11-23 02:37:59,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:59,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35606381] [2021-11-23 02:37:59,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:59,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:37:59,655 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:59,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35606381] [2021-11-23 02:37:59,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35606381] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:59,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:37:59,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:37:59,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430449030] [2021-11-23 02:37:59,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:59,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:37:59,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:59,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:37:59,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:37:59,658 INFO L87 Difference]: Start difference. First operand 8373 states and 11905 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2021-11-23 02:38:00,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:00,360 INFO L93 Difference]: Finished difference Result 14335 states and 20437 transitions. [2021-11-23 02:38:00,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:38:00,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 59 [2021-11-23 02:38:00,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:00,369 INFO L225 Difference]: With dead ends: 14335 [2021-11-23 02:38:00,370 INFO L226 Difference]: Without dead ends: 6165 [2021-11-23 02:38:00,383 INFO L932 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 [2021-11-23 02:38:00,384 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 110 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:38:00,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 303 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:38:00,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6165 states. [2021-11-23 02:38:00,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6165 to 6025. [2021-11-23 02:38:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6025 states, 6024 states have (on average 1.4173306772908367) internal successors, (8538), 6024 states have internal predecessors, (8538), 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) [2021-11-23 02:38:01,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6025 states to 6025 states and 8538 transitions. [2021-11-23 02:38:01,000 INFO L78 Accepts]: Start accepts. Automaton has 6025 states and 8538 transitions. Word has length 59 [2021-11-23 02:38:01,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:01,001 INFO L470 AbstractCegarLoop]: Abstraction has 6025 states and 8538 transitions. [2021-11-23 02:38:01,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2021-11-23 02:38:01,002 INFO L276 IsEmpty]: Start isEmpty. Operand 6025 states and 8538 transitions. [2021-11-23 02:38:01,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-23 02:38:01,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:01,003 INFO L514 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] [2021-11-23 02:38:01,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 02:38:01,004 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:01,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:01,004 INFO L85 PathProgramCache]: Analyzing trace with hash -678250043, now seen corresponding path program 1 times [2021-11-23 02:38:01,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:01,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226398098] [2021-11-23 02:38:01,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:01,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:38:01,044 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:01,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226398098] [2021-11-23 02:38:01,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226398098] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:38:01,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:38:01,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:38:01,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980698640] [2021-11-23 02:38:01,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:38:01,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:38:01,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:38:01,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:38:01,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:38:01,047 INFO L87 Difference]: Start difference. First operand 6025 states and 8538 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2021-11-23 02:38:01,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:01,635 INFO L93 Difference]: Finished difference Result 10394 states and 14791 transitions. [2021-11-23 02:38:01,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:38:01,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 59 [2021-11-23 02:38:01,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:01,647 INFO L225 Difference]: With dead ends: 10394 [2021-11-23 02:38:01,647 INFO L226 Difference]: Without dead ends: 5802 [2021-11-23 02:38:01,654 INFO L932 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 [2021-11-23 02:38:01,654 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 112 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:38:01,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 291 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:38:01,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5802 states. [2021-11-23 02:38:02,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5802 to 5800. [2021-11-23 02:38:02,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5800 states, 5799 states have (on average 1.4155888946370063) internal successors, (8209), 5799 states have internal predecessors, (8209), 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) [2021-11-23 02:38:02,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5800 states to 5800 states and 8209 transitions. [2021-11-23 02:38:02,424 INFO L78 Accepts]: Start accepts. Automaton has 5800 states and 8209 transitions. Word has length 59 [2021-11-23 02:38:02,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:02,425 INFO L470 AbstractCegarLoop]: Abstraction has 5800 states and 8209 transitions. [2021-11-23 02:38:02,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2021-11-23 02:38:02,425 INFO L276 IsEmpty]: Start isEmpty. Operand 5800 states and 8209 transitions. [2021-11-23 02:38:02,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 02:38:02,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:02,427 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:38:02,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 02:38:02,428 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:02,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:02,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1682930674, now seen corresponding path program 1 times [2021-11-23 02:38:02,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:02,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80144118] [2021-11-23 02:38:02,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:02,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:38:04,912 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:04,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80144118] [2021-11-23 02:38:04,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80144118] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:38:04,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:38:04,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-11-23 02:38:04,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752456327] [2021-11-23 02:38:04,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:38:04,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 02:38:04,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:38:04,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 02:38:04,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-11-23 02:38:04,915 INFO L87 Difference]: Start difference. First operand 5800 states and 8209 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:38:10,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:10,703 INFO L93 Difference]: Finished difference Result 6460 states and 9115 transitions. [2021-11-23 02:38:10,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-23 02:38:10,703 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-23 02:38:10,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:10,712 INFO L225 Difference]: With dead ends: 6460 [2021-11-23 02:38:10,712 INFO L226 Difference]: Without dead ends: 6458 [2021-11-23 02:38:10,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=619, Invalid=1931, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 02:38:10,716 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 1136 mSDsluCounter, 2032 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1136 SdHoareTripleChecker+Valid, 2252 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:38:10,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1136 Valid, 2252 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-23 02:38:10,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6458 states. [2021-11-23 02:38:11,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6458 to 5800. [2021-11-23 02:38:11,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5800 states, 5799 states have (on average 1.4155888946370063) internal successors, (8209), 5799 states have internal predecessors, (8209), 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) [2021-11-23 02:38:11,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5800 states to 5800 states and 8209 transitions. [2021-11-23 02:38:11,317 INFO L78 Accepts]: Start accepts. Automaton has 5800 states and 8209 transitions. Word has length 60 [2021-11-23 02:38:11,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:11,318 INFO L470 AbstractCegarLoop]: Abstraction has 5800 states and 8209 transitions. [2021-11-23 02:38:11,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:38:11,318 INFO L276 IsEmpty]: Start isEmpty. Operand 5800 states and 8209 transitions. [2021-11-23 02:38:11,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 02:38:11,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:11,319 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:38:11,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 02:38:11,319 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:11,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:11,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1527028814, now seen corresponding path program 1 times [2021-11-23 02:38:11,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:11,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439434554] [2021-11-23 02:38:11,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:11,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:13,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:38:13,272 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:13,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439434554] [2021-11-23 02:38:13,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439434554] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:38:13,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:38:13,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-23 02:38:13,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531311202] [2021-11-23 02:38:13,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:38:13,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 02:38:13,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:38:13,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 02:38:13,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-11-23 02:38:13,275 INFO L87 Difference]: Start difference. First operand 5800 states and 8209 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:38:18,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:18,728 INFO L93 Difference]: Finished difference Result 7573 states and 10637 transitions. [2021-11-23 02:38:18,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-23 02:38:18,729 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-23 02:38:18,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:18,745 INFO L225 Difference]: With dead ends: 7573 [2021-11-23 02:38:18,746 INFO L226 Difference]: Without dead ends: 7571 [2021-11-23 02:38:18,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=520, Invalid=1460, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 02:38:18,751 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 825 mSDsluCounter, 2122 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 2368 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:38:18,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [825 Valid, 2368 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1350 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 02:38:18,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7571 states. [2021-11-23 02:38:19,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7571 to 5806. [2021-11-23 02:38:19,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5806 states, 5805 states have (on average 1.4153316106804479) internal successors, (8216), 5805 states have internal predecessors, (8216), 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) [2021-11-23 02:38:19,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5806 states to 5806 states and 8216 transitions. [2021-11-23 02:38:19,340 INFO L78 Accepts]: Start accepts. Automaton has 5806 states and 8216 transitions. Word has length 60 [2021-11-23 02:38:19,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:19,341 INFO L470 AbstractCegarLoop]: Abstraction has 5806 states and 8216 transitions. [2021-11-23 02:38:19,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:38:19,341 INFO L276 IsEmpty]: Start isEmpty. Operand 5806 states and 8216 transitions. [2021-11-23 02:38:19,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 02:38:19,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:19,342 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:38:19,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 02:38:19,343 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:19,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:19,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1888389230, now seen corresponding path program 1 times [2021-11-23 02:38:19,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:19,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66026540] [2021-11-23 02:38:19,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:19,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:38:22,423 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:22,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66026540] [2021-11-23 02:38:22,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66026540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:38:22,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:38:22,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-11-23 02:38:22,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541324119] [2021-11-23 02:38:22,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:38:22,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-23 02:38:22,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:38:22,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-23 02:38:22,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2021-11-23 02:38:22,426 INFO L87 Difference]: Start difference. First operand 5806 states and 8216 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:38:28,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:28,767 INFO L93 Difference]: Finished difference Result 7896 states and 11161 transitions. [2021-11-23 02:38:28,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-23 02:38:28,768 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-23 02:38:28,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:28,780 INFO L225 Difference]: With dead ends: 7896 [2021-11-23 02:38:28,780 INFO L226 Difference]: Without dead ends: 7894 [2021-11-23 02:38:28,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=472, Invalid=1690, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 02:38:28,784 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 746 mSDsluCounter, 1704 mSDsCounter, 0 mSdLazyCounter, 2611 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 1963 SdHoareTripleChecker+Invalid, 2639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:38:28,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 1963 Invalid, 2639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2611 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-23 02:38:28,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7894 states. [2021-11-23 02:38:29,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7894 to 6526. [2021-11-23 02:38:29,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6526 states, 6525 states have (on average 1.4154789272030652) internal successors, (9236), 6525 states have internal predecessors, (9236), 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) [2021-11-23 02:38:29,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6526 states to 6526 states and 9236 transitions. [2021-11-23 02:38:29,492 INFO L78 Accepts]: Start accepts. Automaton has 6526 states and 9236 transitions. Word has length 60 [2021-11-23 02:38:29,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:29,492 INFO L470 AbstractCegarLoop]: Abstraction has 6526 states and 9236 transitions. [2021-11-23 02:38:29,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:38:29,493 INFO L276 IsEmpty]: Start isEmpty. Operand 6526 states and 9236 transitions. [2021-11-23 02:38:29,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 02:38:29,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:29,494 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:38:29,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 02:38:29,494 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:29,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:29,495 INFO L85 PathProgramCache]: Analyzing trace with hash -483790802, now seen corresponding path program 1 times [2021-11-23 02:38:29,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:29,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027112270] [2021-11-23 02:38:29,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:29,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:38:31,348 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:31,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027112270] [2021-11-23 02:38:31,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027112270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:38:31,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:38:31,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-23 02:38:31,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232319353] [2021-11-23 02:38:31,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:38:31,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 02:38:31,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:38:31,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 02:38:31,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-11-23 02:38:31,352 INFO L87 Difference]: Start difference. First operand 6526 states and 9236 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:38:35,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:35,203 INFO L93 Difference]: Finished difference Result 7555 states and 10671 transitions. [2021-11-23 02:38:35,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 02:38:35,204 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-23 02:38:35,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:35,214 INFO L225 Difference]: With dead ends: 7555 [2021-11-23 02:38:35,214 INFO L226 Difference]: Without dead ends: 7553 [2021-11-23 02:38:35,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=548, Invalid=1708, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 02:38:35,218 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 1045 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1045 SdHoareTripleChecker+Valid, 1668 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:38:35,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1045 Valid, 1668 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 02:38:35,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7553 states. [2021-11-23 02:38:35,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7553 to 6523. [2021-11-23 02:38:35,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6523 states, 6522 states have (on average 1.4155167126648267) internal successors, (9232), 6522 states have internal predecessors, (9232), 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) [2021-11-23 02:38:35,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6523 states to 6523 states and 9232 transitions. [2021-11-23 02:38:35,904 INFO L78 Accepts]: Start accepts. Automaton has 6523 states and 9232 transitions. Word has length 60 [2021-11-23 02:38:35,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:35,905 INFO L470 AbstractCegarLoop]: Abstraction has 6523 states and 9232 transitions. [2021-11-23 02:38:35,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:38:35,905 INFO L276 IsEmpty]: Start isEmpty. Operand 6523 states and 9232 transitions. [2021-11-23 02:38:35,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 02:38:35,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:35,906 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:38:35,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-23 02:38:35,906 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:35,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:35,907 INFO L85 PathProgramCache]: Analyzing trace with hash 2061659030, now seen corresponding path program 1 times [2021-11-23 02:38:35,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:35,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599097405] [2021-11-23 02:38:35,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:35,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:35,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:38:35,944 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:35,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599097405] [2021-11-23 02:38:35,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599097405] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:38:35,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:38:35,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:38:35,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010052534] [2021-11-23 02:38:35,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:38:35,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:38:35,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:38:35,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:38:35,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:38:35,947 INFO L87 Difference]: Start difference. First operand 6523 states and 9232 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:38:36,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:36,818 INFO L93 Difference]: Finished difference Result 12176 states and 17293 transitions. [2021-11-23 02:38:36,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:38:36,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-23 02:38:36,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:36,828 INFO L225 Difference]: With dead ends: 12176 [2021-11-23 02:38:36,828 INFO L226 Difference]: Without dead ends: 6302 [2021-11-23 02:38:36,837 INFO L932 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 [2021-11-23 02:38:36,838 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 105 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:38:36,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 291 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:38:36,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6302 states. [2021-11-23 02:38:37,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6302 to 6299. [2021-11-23 02:38:37,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6299 states, 6298 states have (on average 1.4129882502381708) internal successors, (8899), 6298 states have internal predecessors, (8899), 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) [2021-11-23 02:38:37,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6299 states to 6299 states and 8899 transitions. [2021-11-23 02:38:37,491 INFO L78 Accepts]: Start accepts. Automaton has 6299 states and 8899 transitions. Word has length 61 [2021-11-23 02:38:37,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:37,491 INFO L470 AbstractCegarLoop]: Abstraction has 6299 states and 8899 transitions. [2021-11-23 02:38:37,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:38:37,491 INFO L276 IsEmpty]: Start isEmpty. Operand 6299 states and 8899 transitions. [2021-11-23 02:38:37,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 02:38:37,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:37,493 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:38:37,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-23 02:38:37,494 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:37,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:37,494 INFO L85 PathProgramCache]: Analyzing trace with hash -393337148, now seen corresponding path program 1 times [2021-11-23 02:38:37,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:37,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527729038] [2021-11-23 02:38:37,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:37,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:38:37,525 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:37,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527729038] [2021-11-23 02:38:37,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527729038] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:38:37,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:38:37,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:38:37,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401549912] [2021-11-23 02:38:37,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:38:37,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:38:37,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:38:37,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:38:37,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:38:37,528 INFO L87 Difference]: Start difference. First operand 6299 states and 8899 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:38:38,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:38,246 INFO L93 Difference]: Finished difference Result 11235 states and 15916 transitions. [2021-11-23 02:38:38,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:38:38,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-23 02:38:38,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:38,254 INFO L225 Difference]: With dead ends: 11235 [2021-11-23 02:38:38,254 INFO L226 Difference]: Without dead ends: 6003 [2021-11-23 02:38:38,260 INFO L932 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 [2021-11-23 02:38:38,261 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 109 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:38:38,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 279 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:38:38,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6003 states. [2021-11-23 02:38:38,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6003 to 6001. [2021-11-23 02:38:38,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6001 states, 6000 states have (on average 1.4098333333333333) internal successors, (8459), 6000 states have internal predecessors, (8459), 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) [2021-11-23 02:38:38,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6001 states to 6001 states and 8459 transitions. [2021-11-23 02:38:38,869 INFO L78 Accepts]: Start accepts. Automaton has 6001 states and 8459 transitions. Word has length 61 [2021-11-23 02:38:38,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:38,870 INFO L470 AbstractCegarLoop]: Abstraction has 6001 states and 8459 transitions. [2021-11-23 02:38:38,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:38:38,870 INFO L276 IsEmpty]: Start isEmpty. Operand 6001 states and 8459 transitions. [2021-11-23 02:38:38,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-23 02:38:38,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:38,871 INFO L514 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] [2021-11-23 02:38:38,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-23 02:38:38,871 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:38,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:38,872 INFO L85 PathProgramCache]: Analyzing trace with hash -792398782, now seen corresponding path program 1 times [2021-11-23 02:38:38,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:38,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124968893] [2021-11-23 02:38:38,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:38,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:38:44,926 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:44,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124968893] [2021-11-23 02:38:44,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124968893] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:38:44,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:38:44,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-11-23 02:38:44,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034108106] [2021-11-23 02:38:44,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:38:44,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 02:38:44,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:38:44,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 02:38:44,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 02:38:44,929 INFO L87 Difference]: Start difference. First operand 6001 states and 8459 transitions. Second operand has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 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) [2021-11-23 02:38:54,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:54,726 INFO L93 Difference]: Finished difference Result 6575 states and 9257 transitions. [2021-11-23 02:38:54,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-23 02:38:54,727 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 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 62 [2021-11-23 02:38:54,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:54,737 INFO L225 Difference]: With dead ends: 6575 [2021-11-23 02:38:54,737 INFO L226 Difference]: Without dead ends: 6573 [2021-11-23 02:38:54,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=893, Invalid=2889, Unknown=0, NotChecked=0, Total=3782 [2021-11-23 02:38:54,741 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 823 mSDsluCounter, 2602 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 2845 SdHoareTripleChecker+Invalid, 1806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:38:54,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [823 Valid, 2845 Invalid, 1806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1784 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 02:38:54,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6573 states. [2021-11-23 02:38:55,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6573 to 5989. [2021-11-23 02:38:55,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5989 states, 5988 states have (on average 1.4106546426185704) internal successors, (8447), 5988 states have internal predecessors, (8447), 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) [2021-11-23 02:38:55,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5989 states to 5989 states and 8447 transitions. [2021-11-23 02:38:55,358 INFO L78 Accepts]: Start accepts. Automaton has 5989 states and 8447 transitions. Word has length 62 [2021-11-23 02:38:55,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:55,358 INFO L470 AbstractCegarLoop]: Abstraction has 5989 states and 8447 transitions. [2021-11-23 02:38:55,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 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) [2021-11-23 02:38:55,359 INFO L276 IsEmpty]: Start isEmpty. Operand 5989 states and 8447 transitions. [2021-11-23 02:38:55,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 02:38:55,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:55,361 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:38:55,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-23 02:38:55,362 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:55,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:55,362 INFO L85 PathProgramCache]: Analyzing trace with hash 482845675, now seen corresponding path program 1 times [2021-11-23 02:38:55,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:55,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272036305] [2021-11-23 02:38:55,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:55,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:38:55,429 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:55,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272036305] [2021-11-23 02:38:55,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272036305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:38:55,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:38:55,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:38:55,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771976911] [2021-11-23 02:38:55,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:38:55,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:38:55,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:38:55,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:38:55,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:38:55,432 INFO L87 Difference]: Start difference. First operand 5989 states and 8447 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2021-11-23 02:38:56,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:56,462 INFO L93 Difference]: Finished difference Result 9538 states and 13597 transitions. [2021-11-23 02:38:56,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:38:56,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 67 [2021-11-23 02:38:56,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:56,472 INFO L225 Difference]: With dead ends: 9538 [2021-11-23 02:38:56,472 INFO L226 Difference]: Without dead ends: 7360 [2021-11-23 02:38:56,476 INFO L932 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 [2021-11-23 02:38:56,477 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 80 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:38:56,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 338 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:38:56,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7360 states. [2021-11-23 02:38:57,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7360 to 6961. [2021-11-23 02:38:57,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6961 states, 6960 states have (on average 1.4102011494252873) internal successors, (9815), 6960 states have internal predecessors, (9815), 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) [2021-11-23 02:38:57,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6961 states to 6961 states and 9815 transitions. [2021-11-23 02:38:57,192 INFO L78 Accepts]: Start accepts. Automaton has 6961 states and 9815 transitions. Word has length 67 [2021-11-23 02:38:57,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:57,192 INFO L470 AbstractCegarLoop]: Abstraction has 6961 states and 9815 transitions. [2021-11-23 02:38:57,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2021-11-23 02:38:57,192 INFO L276 IsEmpty]: Start isEmpty. Operand 6961 states and 9815 transitions. [2021-11-23 02:38:57,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 02:38:57,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:57,195 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:38:57,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-23 02:38:57,195 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:57,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:57,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1460301266, now seen corresponding path program 1 times [2021-11-23 02:38:57,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:57,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682770330] [2021-11-23 02:38:57,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:57,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:57,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:38:57,252 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:57,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682770330] [2021-11-23 02:38:57,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682770330] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:38:57,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:38:57,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:38:57,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412521432] [2021-11-23 02:38:57,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:38:57,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:38:57,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:38:57,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:38:57,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:38:57,255 INFO L87 Difference]: Start difference. First operand 6961 states and 9815 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2021-11-23 02:38:58,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:58,575 INFO L93 Difference]: Finished difference Result 11954 states and 17023 transitions. [2021-11-23 02:38:58,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:38:58,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 70 [2021-11-23 02:38:58,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:58,587 INFO L225 Difference]: With dead ends: 11954 [2021-11-23 02:38:58,587 INFO L226 Difference]: Without dead ends: 8824 [2021-11-23 02:38:58,592 INFO L932 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 [2021-11-23 02:38:58,593 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 75 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:38:58,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 319 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:38:58,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8824 states. [2021-11-23 02:38:59,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8824 to 8280. [2021-11-23 02:38:59,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8280 states, 8279 states have (on average 1.4081410798405605) internal successors, (11658), 8279 states have internal predecessors, (11658), 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) [2021-11-23 02:38:59,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8280 states to 8280 states and 11658 transitions. [2021-11-23 02:38:59,417 INFO L78 Accepts]: Start accepts. Automaton has 8280 states and 11658 transitions. Word has length 70 [2021-11-23 02:38:59,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:59,417 INFO L470 AbstractCegarLoop]: Abstraction has 8280 states and 11658 transitions. [2021-11-23 02:38:59,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2021-11-23 02:38:59,418 INFO L276 IsEmpty]: Start isEmpty. Operand 8280 states and 11658 transitions. [2021-11-23 02:38:59,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 02:38:59,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:59,420 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:38:59,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-23 02:38:59,421 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:59,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:59,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1272855671, now seen corresponding path program 1 times [2021-11-23 02:38:59,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:59,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895374313] [2021-11-23 02:38:59,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:59,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:38:59,478 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:59,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895374313] [2021-11-23 02:38:59,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895374313] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:38:59,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:38:59,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:38:59,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547633734] [2021-11-23 02:38:59,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:38:59,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:38:59,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:38:59,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:38:59,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:38:59,481 INFO L87 Difference]: Start difference. First operand 8280 states and 11658 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2021-11-23 02:39:01,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:39:01,020 INFO L93 Difference]: Finished difference Result 16478 states and 23353 transitions. [2021-11-23 02:39:01,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:39:01,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 73 [2021-11-23 02:39:01,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:39:01,036 INFO L225 Difference]: With dead ends: 16478 [2021-11-23 02:39:01,036 INFO L226 Difference]: Without dead ends: 11236 [2021-11-23 02:39:01,045 INFO L932 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 [2021-11-23 02:39:01,045 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 70 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:39:01,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 300 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:39:01,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11236 states. [2021-11-23 02:39:02,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11236 to 10362. [2021-11-23 02:39:02,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10362 states, 10361 states have (on average 1.4018917092944696) internal successors, (14525), 10361 states have internal predecessors, (14525), 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) [2021-11-23 02:39:02,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10362 states to 10362 states and 14525 transitions. [2021-11-23 02:39:02,251 INFO L78 Accepts]: Start accepts. Automaton has 10362 states and 14525 transitions. Word has length 73 [2021-11-23 02:39:02,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:39:02,251 INFO L470 AbstractCegarLoop]: Abstraction has 10362 states and 14525 transitions. [2021-11-23 02:39:02,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2021-11-23 02:39:02,252 INFO L276 IsEmpty]: Start isEmpty. Operand 10362 states and 14525 transitions. [2021-11-23 02:39:02,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-23 02:39:02,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:39:02,254 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:39:02,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-23 02:39:02,254 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:39:02,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:39:02,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1473717418, now seen corresponding path program 1 times [2021-11-23 02:39:02,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:39:02,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687984932] [2021-11-23 02:39:02,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:39:02,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:39:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:39:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:39:02,311 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:39:02,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687984932] [2021-11-23 02:39:02,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687984932] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:39:02,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:39:02,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:39:02,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912640118] [2021-11-23 02:39:02,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:39:02,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:39:02,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:39:02,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:39:02,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:39:02,314 INFO L87 Difference]: Start difference. First operand 10362 states and 14525 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:39:04,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:39:04,178 INFO L93 Difference]: Finished difference Result 24047 states and 33826 transitions. [2021-11-23 02:39:04,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:39:04,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-23 02:39:04,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:39:04,200 INFO L225 Difference]: With dead ends: 24047 [2021-11-23 02:39:04,201 INFO L226 Difference]: Without dead ends: 14787 [2021-11-23 02:39:04,212 INFO L932 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 [2021-11-23 02:39:04,212 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 65 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:39:04,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 279 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:39:04,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14787 states. [2021-11-23 02:39:05,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14787 to 13595. [2021-11-23 02:39:05,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13595 states, 13594 states have (on average 1.3925261144622627) internal successors, (18930), 13594 states have internal predecessors, (18930), 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) [2021-11-23 02:39:05,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13595 states to 13595 states and 18930 transitions. [2021-11-23 02:39:05,878 INFO L78 Accepts]: Start accepts. Automaton has 13595 states and 18930 transitions. Word has length 76 [2021-11-23 02:39:05,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:39:05,878 INFO L470 AbstractCegarLoop]: Abstraction has 13595 states and 18930 transitions. [2021-11-23 02:39:05,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:39:05,878 INFO L276 IsEmpty]: Start isEmpty. Operand 13595 states and 18930 transitions. [2021-11-23 02:39:05,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-23 02:39:05,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:39:05,885 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:39:05,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-23 02:39:05,886 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:39:05,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:39:05,886 INFO L85 PathProgramCache]: Analyzing trace with hash -717739392, now seen corresponding path program 1 times [2021-11-23 02:39:05,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:39:05,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181410389] [2021-11-23 02:39:05,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:39:05,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:39:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:39:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:39:05,994 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:39:05,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181410389] [2021-11-23 02:39:05,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181410389] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:39:05,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:39:05,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:39:05,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873018483] [2021-11-23 02:39:05,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:39:05,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:39:05,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:39:05,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:39:05,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:39:05,997 INFO L87 Difference]: Start difference. First operand 13595 states and 18930 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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) [2021-11-23 02:39:10,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:39:10,944 INFO L93 Difference]: Finished difference Result 52296 states and 72613 transitions. [2021-11-23 02:39:10,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:39:10,944 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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 92 [2021-11-23 02:39:10,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:39:11,008 INFO L225 Difference]: With dead ends: 52296 [2021-11-23 02:39:11,008 INFO L226 Difference]: Without dead ends: 38990 [2021-11-23 02:39:11,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:39:11,026 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 634 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:39:11,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 436 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:39:11,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38990 states. [2021-11-23 02:39:14,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38990 to 23495. [2021-11-23 02:39:14,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23495 states, 23494 states have (on average 1.3637950114922959) internal successors, (32041), 23494 states have internal predecessors, (32041), 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) [2021-11-23 02:39:14,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23495 states to 23495 states and 32041 transitions. [2021-11-23 02:39:14,247 INFO L78 Accepts]: Start accepts. Automaton has 23495 states and 32041 transitions. Word has length 92 [2021-11-23 02:39:14,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:39:14,248 INFO L470 AbstractCegarLoop]: Abstraction has 23495 states and 32041 transitions. [2021-11-23 02:39:14,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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) [2021-11-23 02:39:14,248 INFO L276 IsEmpty]: Start isEmpty. Operand 23495 states and 32041 transitions. [2021-11-23 02:39:14,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-23 02:39:14,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:39:14,258 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:39:14,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-23 02:39:14,259 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:39:14,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:39:14,259 INFO L85 PathProgramCache]: Analyzing trace with hash 899765499, now seen corresponding path program 1 times [2021-11-23 02:39:14,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:39:14,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089065202] [2021-11-23 02:39:14,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:39:14,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:39:14,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:39:14,737 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:39:14,738 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:39:14,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089065202] [2021-11-23 02:39:14,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089065202] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:39:14,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352670644] [2021-11-23 02:39:14,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:39:14,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:39:14,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb14583-e9e8-4fcd-be50-9ff67913dfcf/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:39:14,741 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb14583-e9e8-4fcd-be50-9ff67913dfcf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:39:14,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb14583-e9e8-4fcd-be50-9ff67913dfcf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:39:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:39:14,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 129 conjunts are in the unsatisfiable core [2021-11-23 02:39:14,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:39:24,089 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:39:24,090 INFO L328 TraceCheckSpWp]: Computing backward predicates...