./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb319465-5846-4dcf-9c66-4cc8593ea2f2/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb319465-5846-4dcf-9c66-4cc8593ea2f2/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb319465-5846-4dcf-9c66-4cc8593ea2f2/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb319465-5846-4dcf-9c66-4cc8593ea2f2/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb319465-5846-4dcf-9c66-4cc8593ea2f2/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb319465-5846-4dcf-9c66-4cc8593ea2f2/bin/utaipan-vmNK8stdcF --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 59df1758127560236621fddca0cfb7b951a4ad9d8bd949539c1385f0c08fd544 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:36:08,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:36:08,677 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:36:08,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:36:08,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:36:08,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:36:08,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:36:08,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:36:08,716 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:36:08,717 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:36:08,718 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:36:08,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:36:08,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:36:08,722 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:36:08,723 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:36:08,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:36:08,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:36:08,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:36:08,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:36:08,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:36:08,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:36:08,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:36:08,741 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:36:08,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:36:08,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:36:08,751 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:36:08,754 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:36:08,756 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:36:08,758 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:36:08,759 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:36:08,760 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:36:08,761 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:36:08,762 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:36:08,763 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:36:08,764 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:36:08,764 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:36:08,765 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:36:08,765 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:36:08,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:36:08,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:36:08,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:36:08,768 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb319465-5846-4dcf-9c66-4cc8593ea2f2/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:36:08,794 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:36:08,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:36:08,796 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:36:08,796 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:36:08,796 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:36:08,797 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:36:08,797 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:36:08,797 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:36:08,797 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:36:08,798 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:36:08,798 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:36:08,798 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:36:08,798 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:36:08,805 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:36:08,805 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:36:08,805 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:36:08,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:36:08,806 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:36:08,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:36:08,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:36:08,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:36:08,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:36:08,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:36:08,808 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:36:08,808 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:36:08,808 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:36:08,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:36:08,809 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:36:08,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:36:08,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:36:08,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:36:08,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:36:08,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:36:08,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:36:08,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:36:08,811 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:36:08,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:36:08,811 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:36:08,811 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:36:08,812 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:36:08,812 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_bb319465-5846-4dcf-9c66-4cc8593ea2f2/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb319465-5846-4dcf-9c66-4cc8593ea2f2/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 59df1758127560236621fddca0cfb7b951a4ad9d8bd949539c1385f0c08fd544 [2021-11-12 22:36:09,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:36:09,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:36:09,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:36:09,090 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:36:09,091 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:36:09,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb319465-5846-4dcf-9c66-4cc8593ea2f2/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c [2021-11-12 22:36:09,184 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb319465-5846-4dcf-9c66-4cc8593ea2f2/bin/utaipan-vmNK8stdcF/data/239e41a58/6cba83db5d964013b387cb2bd2d7000b/FLAG01a89ca7e [2021-11-12 22:36:09,680 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:36:09,680 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb319465-5846-4dcf-9c66-4cc8593ea2f2/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c [2021-11-12 22:36:09,692 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb319465-5846-4dcf-9c66-4cc8593ea2f2/bin/utaipan-vmNK8stdcF/data/239e41a58/6cba83db5d964013b387cb2bd2d7000b/FLAG01a89ca7e [2021-11-12 22:36:10,009 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb319465-5846-4dcf-9c66-4cc8593ea2f2/bin/utaipan-vmNK8stdcF/data/239e41a58/6cba83db5d964013b387cb2bd2d7000b [2021-11-12 22:36:10,011 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:36:10,012 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:36:10,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:36:10,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:36:10,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:36:10,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:36:10" (1/1) ... [2021-11-12 22:36:10,022 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34dd8053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:10, skipping insertion in model container [2021-11-12 22:36:10,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:36:10" (1/1) ... [2021-11-12 22:36:10,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:36:10,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:36:10,470 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb319465-5846-4dcf-9c66-4cc8593ea2f2/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c[10527,10540] [2021-11-12 22:36:10,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:36:10,593 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:36:10,692 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb319465-5846-4dcf-9c66-4cc8593ea2f2/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c[10527,10540] [2021-11-12 22:36:10,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:36:10,750 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:36:10,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:10 WrapperNode [2021-11-12 22:36:10,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:36:10,752 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:36:10,752 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:36:10,753 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:36:10,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:10" (1/1) ... [2021-11-12 22:36:10,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:10" (1/1) ... [2021-11-12 22:36:10,826 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:36:10,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:36:10,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:36:10,827 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:36:10,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:10" (1/1) ... [2021-11-12 22:36:10,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:10" (1/1) ... [2021-11-12 22:36:10,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:10" (1/1) ... [2021-11-12 22:36:10,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:10" (1/1) ... [2021-11-12 22:36:10,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:10" (1/1) ... [2021-11-12 22:36:10,896 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:10" (1/1) ... [2021-11-12 22:36:10,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:10" (1/1) ... [2021-11-12 22:36:10,905 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:36:10,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:36:10,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:36:10,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:36:10,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:10" (1/1) ... [2021-11-12 22:36:10,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:36:10,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb319465-5846-4dcf-9c66-4cc8593ea2f2/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:36:10,966 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb319465-5846-4dcf-9c66-4cc8593ea2f2/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:36:10,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb319465-5846-4dcf-9c66-4cc8593ea2f2/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:36:11,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:36:11,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 22:36:11,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:36:11,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:36:12,285 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:36:12,286 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 22:36:12,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:36:12 BoogieIcfgContainer [2021-11-12 22:36:12,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:36:12,293 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:36:12,293 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:36:12,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:36:12,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:36:10" (1/3) ... [2021-11-12 22:36:12,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa1cb7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:36:12, skipping insertion in model container [2021-11-12 22:36:12,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:10" (2/3) ... [2021-11-12 22:36:12,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa1cb7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:36:12, skipping insertion in model container [2021-11-12 22:36:12,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:36:12" (3/3) ... [2021-11-12 22:36:12,300 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c [2021-11-12 22:36:12,310 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:36:12,311 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:36:12,362 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:36:12,369 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 [2021-11-12 22:36:12,369 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:36:12,387 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 145 states have (on average 1.7724137931034483) internal successors, (257), 146 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:36:12,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-12 22:36:12,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:12,398 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:12,398 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:12,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:12,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1794662925, now seen corresponding path program 1 times [2021-11-12 22:36:12,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:36:12,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219574037] [2021-11-12 22:36:12,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:12,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:36:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:36:12,913 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:36:12,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219574037] [2021-11-12 22:36:12,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219574037] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:12,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:36:12,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:36:12,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594666970] [2021-11-12 22:36:12,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:12,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:36:12,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:36:12,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:36:12,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:36:12,958 INFO L87 Difference]: Start difference. First operand has 147 states, 145 states have (on average 1.7724137931034483) internal successors, (257), 146 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:36:13,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:13,216 INFO L93 Difference]: Finished difference Result 226 states and 377 transitions. [2021-11-12 22:36:13,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:36:13,219 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-11-12 22:36:13,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:13,229 INFO L225 Difference]: With dead ends: 226 [2021-11-12 22:36:13,229 INFO L226 Difference]: Without dead ends: 145 [2021-11-12 22:36:13,233 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 [2021-11-12 22:36:13,237 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 614 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 131.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.65ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 172.87ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:13,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 224 Invalid, 118 Unknown, 0 Unchecked, 10.65ms Time], IncrementalHoareTripleChecker [7 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 172.87ms Time] [2021-11-12 22:36:13,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-12 22:36:13,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-12 22:36:13,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.2083333333333333) internal successors, (174), 144 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:36:13,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 174 transitions. [2021-11-12 22:36:13,285 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 174 transitions. Word has length 93 [2021-11-12 22:36:13,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:13,286 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 174 transitions. [2021-11-12 22:36:13,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:36:13,286 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 174 transitions. [2021-11-12 22:36:13,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-12 22:36:13,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:13,290 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:13,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 22:36:13,291 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:13,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:13,292 INFO L85 PathProgramCache]: Analyzing trace with hash -560357399, now seen corresponding path program 1 times [2021-11-12 22:36:13,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:36:13,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661798759] [2021-11-12 22:36:13,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:13,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:36:13,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:36:13,516 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:36:13,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661798759] [2021-11-12 22:36:13,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661798759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:13,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:36:13,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:36:13,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989482433] [2021-11-12 22:36:13,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:13,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:36:13,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:36:13,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:36:13,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:36:13,522 INFO L87 Difference]: Start difference. First operand 145 states and 174 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:36:13,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:13,695 INFO L93 Difference]: Finished difference Result 226 states and 281 transitions. [2021-11-12 22:36:13,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:36:13,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 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 94 [2021-11-12 22:36:13,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:13,702 INFO L225 Difference]: With dead ends: 226 [2021-11-12 22:36:13,702 INFO L226 Difference]: Without dead ends: 145 [2021-11-12 22:36:13,708 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 [2021-11-12 22:36:13,710 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 428 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.73ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 107.65ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:13,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 107 Invalid, 94 Unknown, 0 Unchecked, 2.73ms Time], IncrementalHoareTripleChecker [7 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 107.65ms Time] [2021-11-12 22:36:13,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-12 22:36:13,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-12 22:36:13,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1944444444444444) internal successors, (172), 144 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:36:13,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 172 transitions. [2021-11-12 22:36:13,743 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 172 transitions. Word has length 94 [2021-11-12 22:36:13,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:13,746 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 172 transitions. [2021-11-12 22:36:13,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:36:13,747 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 172 transitions. [2021-11-12 22:36:13,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-12 22:36:13,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:13,758 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:13,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 22:36:13,759 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:13,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:13,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1397012301, now seen corresponding path program 1 times [2021-11-12 22:36:13,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:36:13,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464774059] [2021-11-12 22:36:13,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:13,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:36:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:36:13,913 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:36:13,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464774059] [2021-11-12 22:36:13,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464774059] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:13,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:36:13,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:36:13,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554609537] [2021-11-12 22:36:13,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:13,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:36:13,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:36:13,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:36:13,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:36:13,916 INFO L87 Difference]: Start difference. First operand 145 states and 172 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:36:14,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:14,079 INFO L93 Difference]: Finished difference Result 222 states and 273 transitions. [2021-11-12 22:36:14,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:36:14,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2021-11-12 22:36:14,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:14,082 INFO L225 Difference]: With dead ends: 222 [2021-11-12 22:36:14,082 INFO L226 Difference]: Without dead ends: 145 [2021-11-12 22:36:14,083 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 [2021-11-12 22:36:14,090 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 410 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.02ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 129.47ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:14,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 115 Invalid, 92 Unknown, 0 Unchecked, 2.02ms Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 129.47ms Time] [2021-11-12 22:36:14,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-12 22:36:14,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-12 22:36:14,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1805555555555556) internal successors, (170), 144 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:36:14,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 170 transitions. [2021-11-12 22:36:14,116 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 170 transitions. Word has length 95 [2021-11-12 22:36:14,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:14,121 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 170 transitions. [2021-11-12 22:36:14,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:36:14,122 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 170 transitions. [2021-11-12 22:36:14,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-12 22:36:14,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:14,128 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:14,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 22:36:14,129 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:14,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:14,130 INFO L85 PathProgramCache]: Analyzing trace with hash -524080995, now seen corresponding path program 1 times [2021-11-12 22:36:14,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:36:14,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364442200] [2021-11-12 22:36:14,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:14,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:36:14,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:14,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:36:14,349 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:36:14,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364442200] [2021-11-12 22:36:14,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364442200] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:14,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:36:14,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:36:14,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558360923] [2021-11-12 22:36:14,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:14,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:36:14,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:36:14,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:36:14,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:36:14,353 INFO L87 Difference]: Start difference. First operand 145 states and 170 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:36:14,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:14,489 INFO L93 Difference]: Finished difference Result 230 states and 278 transitions. [2021-11-12 22:36:14,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:36:14,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-11-12 22:36:14,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:14,493 INFO L225 Difference]: With dead ends: 230 [2021-11-12 22:36:14,493 INFO L226 Difference]: Without dead ends: 145 [2021-11-12 22:36:14,496 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 [2021-11-12 22:36:14,503 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 427 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 85.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.95ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.03ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:14,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 99 Invalid, 90 Unknown, 0 Unchecked, 1.95ms Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 105.03ms Time] [2021-11-12 22:36:14,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-12 22:36:14,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-12 22:36:14,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1666666666666667) internal successors, (168), 144 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:36:14,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 168 transitions. [2021-11-12 22:36:14,533 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 168 transitions. Word has length 96 [2021-11-12 22:36:14,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:14,534 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 168 transitions. [2021-11-12 22:36:14,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:36:14,534 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 168 transitions. [2021-11-12 22:36:14,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-12 22:36:14,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:14,536 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:14,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 22:36:14,537 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:14,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:14,538 INFO L85 PathProgramCache]: Analyzing trace with hash 300445019, now seen corresponding path program 1 times [2021-11-12 22:36:14,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:36:14,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249208801] [2021-11-12 22:36:14,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:14,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:36:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:36:14,675 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:36:14,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249208801] [2021-11-12 22:36:14,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249208801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:14,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:36:14,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:36:14,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722219855] [2021-11-12 22:36:14,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:14,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:36:14,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:36:14,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:36:14,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:36:14,680 INFO L87 Difference]: Start difference. First operand 145 states and 168 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:36:14,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:14,823 INFO L93 Difference]: Finished difference Result 234 states and 279 transitions. [2021-11-12 22:36:14,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:36:14,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2021-11-12 22:36:14,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:14,826 INFO L225 Difference]: With dead ends: 234 [2021-11-12 22:36:14,826 INFO L226 Difference]: Without dead ends: 145 [2021-11-12 22:36:14,827 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 [2021-11-12 22:36:14,828 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 361 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.62ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 107.04ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:14,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 123 Invalid, 130 Unknown, 0 Unchecked, 2.62ms Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 107.04ms Time] [2021-11-12 22:36:14,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-12 22:36:14,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-12 22:36:14,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1597222222222223) internal successors, (167), 144 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:36:14,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 167 transitions. [2021-11-12 22:36:14,845 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 167 transitions. Word has length 97 [2021-11-12 22:36:14,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:14,849 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 167 transitions. [2021-11-12 22:36:14,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:36:14,850 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 167 transitions. [2021-11-12 22:36:14,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-12 22:36:14,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:14,852 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:14,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 22:36:14,852 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:14,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:14,858 INFO L85 PathProgramCache]: Analyzing trace with hash -165671855, now seen corresponding path program 1 times [2021-11-12 22:36:14,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:36:14,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726918088] [2021-11-12 22:36:14,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:14,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:36:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:14,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:36:14,968 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:36:14,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726918088] [2021-11-12 22:36:14,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726918088] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:14,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:36:14,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:36:14,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139344989] [2021-11-12 22:36:14,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:14,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:36:14,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:36:14,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:36:14,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:36:14,971 INFO L87 Difference]: Start difference. First operand 145 states and 167 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:36:15,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:15,120 INFO L93 Difference]: Finished difference Result 210 states and 252 transitions. [2021-11-12 22:36:15,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:36:15,121 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-11-12 22:36:15,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:15,122 INFO L225 Difference]: With dead ends: 210 [2021-11-12 22:36:15,122 INFO L226 Difference]: Without dead ends: 145 [2021-11-12 22:36:15,122 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 [2021-11-12 22:36:15,124 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 361 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.39ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.63ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:15,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 139 Invalid, 84 Unknown, 0 Unchecked, 2.39ms Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 88.63ms Time] [2021-11-12 22:36:15,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-12 22:36:15,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-12 22:36:15,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1458333333333333) internal successors, (165), 144 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:36:15,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 165 transitions. [2021-11-12 22:36:15,138 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 165 transitions. Word has length 98 [2021-11-12 22:36:15,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:15,139 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 165 transitions. [2021-11-12 22:36:15,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:36:15,139 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 165 transitions. [2021-11-12 22:36:15,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-12 22:36:15,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:15,140 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:15,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 22:36:15,141 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:15,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:15,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1667675829, now seen corresponding path program 1 times [2021-11-12 22:36:15,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:36:15,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413024158] [2021-11-12 22:36:15,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:15,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:36:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:15,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:36:15,225 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:36:15,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413024158] [2021-11-12 22:36:15,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413024158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:15,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:36:15,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:36:15,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880243196] [2021-11-12 22:36:15,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:15,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:36:15,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:36:15,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:36:15,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:36:15,228 INFO L87 Difference]: Start difference. First operand 145 states and 165 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:36:15,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:15,345 INFO L93 Difference]: Finished difference Result 214 states and 253 transitions. [2021-11-12 22:36:15,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:36:15,345 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-12 22:36:15,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:15,347 INFO L225 Difference]: With dead ends: 214 [2021-11-12 22:36:15,347 INFO L226 Difference]: Without dead ends: 145 [2021-11-12 22:36:15,347 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 [2021-11-12 22:36:15,348 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 363 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.81ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 85.62ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:15,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 131 Invalid, 85 Unknown, 0 Unchecked, 1.81ms Time], IncrementalHoareTripleChecker [7 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 85.62ms Time] [2021-11-12 22:36:15,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-12 22:36:15,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-12 22:36:15,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1319444444444444) internal successors, (163), 144 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:36:15,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 163 transitions. [2021-11-12 22:36:15,363 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 163 transitions. Word has length 99 [2021-11-12 22:36:15,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:15,363 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 163 transitions. [2021-11-12 22:36:15,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:36:15,364 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 163 transitions. [2021-11-12 22:36:15,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-12 22:36:15,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:15,368 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:15,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 22:36:15,368 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:15,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:15,370 INFO L85 PathProgramCache]: Analyzing trace with hash 2111860485, now seen corresponding path program 1 times [2021-11-12 22:36:15,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:36:15,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407205029] [2021-11-12 22:36:15,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:15,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:36:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:28,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:36:28,642 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:36:28,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407205029] [2021-11-12 22:36:28,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407205029] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:28,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:36:28,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-12 22:36:28,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428142117] [2021-11-12 22:36:28,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:28,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-12 22:36:28,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:36:28,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-12 22:36:28,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2053, Unknown=0, NotChecked=0, Total=2256 [2021-11-12 22:36:28,646 INFO L87 Difference]: Start difference. First operand 145 states and 163 transitions. Second operand has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:36:46,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:46,760 INFO L93 Difference]: Finished difference Result 301 states and 373 transitions. [2021-11-12 22:36:46,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-12 22:36:46,761 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2021-11-12 22:36:46,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:46,764 INFO L225 Difference]: With dead ends: 301 [2021-11-12 22:36:46,764 INFO L226 Difference]: Without dead ends: 249 [2021-11-12 22:36:46,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=1721, Invalid=5419, Unknown=0, NotChecked=0, Total=7140 [2021-11-12 22:36:46,769 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 1549 mSDsluCounter, 1762 mSDsCounter, 0 mSdLazyCounter, 3168 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3128.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 1933 SdHoareTripleChecker+Invalid, 3237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.02ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 3168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3587.89ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:46,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1549 Valid, 1933 Invalid, 3237 Unknown, 0 Unchecked, 16.02ms Time], IncrementalHoareTripleChecker [69 Valid, 3168 Invalid, 0 Unknown, 0 Unchecked, 3587.89ms Time] [2021-11-12 22:36:46,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-12 22:36:46,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 245. [2021-11-12 22:36:46,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.2254098360655739) internal successors, (299), 244 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:36:46,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 299 transitions. [2021-11-12 22:36:46,800 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 299 transitions. Word has length 100 [2021-11-12 22:36:46,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:46,801 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 299 transitions. [2021-11-12 22:36:46,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:36:46,801 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 299 transitions. [2021-11-12 22:36:46,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-12 22:36:46,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:46,803 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:46,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 22:36:46,803 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:46,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:46,804 INFO L85 PathProgramCache]: Analyzing trace with hash -780953175, now seen corresponding path program 1 times [2021-11-12 22:36:46,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:36:46,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32878665] [2021-11-12 22:36:46,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:46,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:36:46,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:37:03,721 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:37:03,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32878665] [2021-11-12 22:37:03,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32878665] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:37:03,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:37:03,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-11-12 22:37:03,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280853957] [2021-11-12 22:37:03,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:37:03,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-12 22:37:03,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:37:03,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-12 22:37:03,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2521, Unknown=0, NotChecked=0, Total=2756 [2021-11-12 22:37:03,725 INFO L87 Difference]: Start difference. First operand 245 states and 299 transitions. Second operand has 53 states, 53 states have (on average 1.9245283018867925) internal successors, (102), 52 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:32,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:37:32,498 INFO L93 Difference]: Finished difference Result 456 states and 583 transitions. [2021-11-12 22:37:32,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-12 22:37:32,499 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9245283018867925) internal successors, (102), 52 states have internal predecessors, (102), 0 states have call successors, (0), 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 102 [2021-11-12 22:37:32,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:37:32,501 INFO L225 Difference]: With dead ends: 456 [2021-11-12 22:37:32,501 INFO L226 Difference]: Without dead ends: 304 [2021-11-12 22:37:32,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=2223, Invalid=7677, Unknown=0, NotChecked=0, Total=9900 [2021-11-12 22:37:32,505 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 1341 mSDsluCounter, 1569 mSDsCounter, 0 mSdLazyCounter, 3481 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4000.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1341 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 3526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.58ms SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 3481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4432.49ms IncrementalHoareTripleChecker+Time [2021-11-12 22:37:32,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1341 Valid, 1686 Invalid, 3526 Unknown, 0 Unchecked, 14.58ms Time], IncrementalHoareTripleChecker [45 Valid, 3481 Invalid, 0 Unknown, 0 Unchecked, 4432.49ms Time] [2021-11-12 22:37:32,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-12 22:37:32,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 297. [2021-11-12 22:37:32,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.2432432432432432) internal successors, (368), 296 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:32,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 368 transitions. [2021-11-12 22:37:32,541 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 368 transitions. Word has length 102 [2021-11-12 22:37:32,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:37:32,541 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 368 transitions. [2021-11-12 22:37:32,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9245283018867925) internal successors, (102), 52 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:32,542 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 368 transitions. [2021-11-12 22:37:32,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-12 22:37:32,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:37:32,543 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:37:32,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 22:37:32,544 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:37:32,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:37:32,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1007245611, now seen corresponding path program 1 times [2021-11-12 22:37:32,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:37:32,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636849814] [2021-11-12 22:37:32,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:37:32,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:37:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:37:32,653 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:37:32,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636849814] [2021-11-12 22:37:32,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636849814] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:37:32,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:37:32,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:37:32,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486528521] [2021-11-12 22:37:32,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:37:32,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:37:32,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:37:32,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:37:32,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:37:32,656 INFO L87 Difference]: Start difference. First operand 297 states and 368 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:32,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:37:32,761 INFO L93 Difference]: Finished difference Result 600 states and 777 transitions. [2021-11-12 22:37:32,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:37:32,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 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 102 [2021-11-12 22:37:32,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:37:32,764 INFO L225 Difference]: With dead ends: 600 [2021-11-12 22:37:32,765 INFO L226 Difference]: Without dead ends: 398 [2021-11-12 22:37:32,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:37:32,766 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 149 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.50ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.45ms IncrementalHoareTripleChecker+Time [2021-11-12 22:37:32,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 341 Invalid, 57 Unknown, 0 Unchecked, 1.50ms Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 50.45ms Time] [2021-11-12 22:37:32,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-12 22:37:32,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 396. [2021-11-12 22:37:32,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 1.2658227848101267) internal successors, (500), 395 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:32,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 500 transitions. [2021-11-12 22:37:32,828 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 500 transitions. Word has length 102 [2021-11-12 22:37:32,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:37:32,829 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 500 transitions. [2021-11-12 22:37:32,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:32,829 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 500 transitions. [2021-11-12 22:37:32,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 22:37:32,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:37:32,830 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:37:32,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 22:37:32,831 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:37:32,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:37:32,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1575178096, now seen corresponding path program 1 times [2021-11-12 22:37:32,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:37:32,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233253090] [2021-11-12 22:37:32,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:37:32,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:37:32,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:32,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:37:32,917 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:37:32,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233253090] [2021-11-12 22:37:32,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233253090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:37:32,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:37:32,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 22:37:32,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458425396] [2021-11-12 22:37:32,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:37:32,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:37:32,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:37:32,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:37:32,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:37:32,919 INFO L87 Difference]: Start difference. First operand 396 states and 500 transitions. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:33,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:37:33,170 INFO L93 Difference]: Finished difference Result 782 states and 1014 transitions. [2021-11-12 22:37:33,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:37:33,170 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2021-11-12 22:37:33,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:37:33,175 INFO L225 Difference]: With dead ends: 782 [2021-11-12 22:37:33,175 INFO L226 Difference]: Without dead ends: 680 [2021-11-12 22:37:33,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:37:33,177 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 339 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 102.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.13ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 122.69ms IncrementalHoareTripleChecker+Time [2021-11-12 22:37:33,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 866 Invalid, 154 Unknown, 0 Unchecked, 2.13ms Time], IncrementalHoareTripleChecker [5 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 122.69ms Time] [2021-11-12 22:37:33,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-11-12 22:37:33,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 347. [2021-11-12 22:37:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.2427745664739884) internal successors, (430), 346 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:33,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 430 transitions. [2021-11-12 22:37:33,235 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 430 transitions. Word has length 103 [2021-11-12 22:37:33,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:37:33,236 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 430 transitions. [2021-11-12 22:37:33,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:33,236 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 430 transitions. [2021-11-12 22:37:33,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 22:37:33,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:37:33,238 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:37:33,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-12 22:37:33,239 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:37:33,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:37:33,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1836935432, now seen corresponding path program 1 times [2021-11-12 22:37:33,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:37:33,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213586523] [2021-11-12 22:37:33,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:37:33,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:37:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:37:33,335 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:37:33,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213586523] [2021-11-12 22:37:33,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213586523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:37:33,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:37:33,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:37:33,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428607811] [2021-11-12 22:37:33,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:37:33,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:37:33,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:37:33,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:37:33,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:37:33,337 INFO L87 Difference]: Start difference. First operand 347 states and 430 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:33,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:37:33,445 INFO L93 Difference]: Finished difference Result 598 states and 765 transitions. [2021-11-12 22:37:33,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:37:33,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-11-12 22:37:33,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:37:33,449 INFO L225 Difference]: With dead ends: 598 [2021-11-12 22:37:33,449 INFO L226 Difference]: Without dead ends: 446 [2021-11-12 22:37:33,449 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 [2021-11-12 22:37:33,450 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 58 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.59ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.56ms IncrementalHoareTripleChecker+Time [2021-11-12 22:37:33,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 330 Invalid, 35 Unknown, 0 Unchecked, 0.59ms Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 39.56ms Time] [2021-11-12 22:37:33,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-12 22:37:33,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 424. [2021-11-12 22:37:33,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 1.2411347517730495) internal successors, (525), 423 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:33,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 525 transitions. [2021-11-12 22:37:33,516 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 525 transitions. Word has length 122 [2021-11-12 22:37:33,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:37:33,516 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 525 transitions. [2021-11-12 22:37:33,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:33,517 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 525 transitions. [2021-11-12 22:37:33,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-12 22:37:33,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:37:33,519 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:37:33,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-12 22:37:33,520 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:37:33,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:37:33,520 INFO L85 PathProgramCache]: Analyzing trace with hash 437903144, now seen corresponding path program 1 times [2021-11-12 22:37:33,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:37:33,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364463460] [2021-11-12 22:37:33,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:37:33,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:37:33,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:33,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:37:33,597 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:37:33,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364463460] [2021-11-12 22:37:33,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364463460] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:37:33,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:37:33,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:37:33,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082770376] [2021-11-12 22:37:33,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:37:33,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:37:33,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:37:33,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:37:33,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:37:33,600 INFO L87 Difference]: Start difference. First operand 424 states and 525 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:33,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:37:33,730 INFO L93 Difference]: Finished difference Result 821 states and 1056 transitions. [2021-11-12 22:37:33,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:37:33,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2021-11-12 22:37:33,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:37:33,735 INFO L225 Difference]: With dead ends: 821 [2021-11-12 22:37:33,735 INFO L226 Difference]: Without dead ends: 614 [2021-11-12 22:37:33,736 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 [2021-11-12 22:37:33,737 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 53 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.62ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.13ms IncrementalHoareTripleChecker+Time [2021-11-12 22:37:33,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 323 Invalid, 36 Unknown, 0 Unchecked, 0.62ms Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 40.13ms Time] [2021-11-12 22:37:33,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-12 22:37:33,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 588. [2021-11-12 22:37:33,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 1.2657580919931857) internal successors, (743), 587 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:33,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 743 transitions. [2021-11-12 22:37:33,826 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 743 transitions. Word has length 125 [2021-11-12 22:37:33,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:37:33,827 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 743 transitions. [2021-11-12 22:37:33,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:33,827 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 743 transitions. [2021-11-12 22:37:33,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-12 22:37:33,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:37:33,829 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:37:33,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-12 22:37:33,830 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:37:33,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:37:33,831 INFO L85 PathProgramCache]: Analyzing trace with hash 10468842, now seen corresponding path program 1 times [2021-11-12 22:37:33,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:37:33,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153262988] [2021-11-12 22:37:33,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:37:33,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:37:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:33,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:37:33,897 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:37:33,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153262988] [2021-11-12 22:37:33,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153262988] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:37:33,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:37:33,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:37:33,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922013000] [2021-11-12 22:37:33,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:37:33,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:37:33,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:37:33,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:37:33,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:37:33,900 INFO L87 Difference]: Start difference. First operand 588 states and 743 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:34,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:37:34,068 INFO L93 Difference]: Finished difference Result 1295 states and 1684 transitions. [2021-11-12 22:37:34,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:37:34,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-12 22:37:34,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:37:34,074 INFO L225 Difference]: With dead ends: 1295 [2021-11-12 22:37:34,074 INFO L226 Difference]: Without dead ends: 936 [2021-11-12 22:37:34,075 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 [2021-11-12 22:37:34,076 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 48 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.57ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.07ms IncrementalHoareTripleChecker+Time [2021-11-12 22:37:34,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 316 Invalid, 37 Unknown, 0 Unchecked, 0.57ms Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 39.07ms Time] [2021-11-12 22:37:34,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-11-12 22:37:34,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 898. [2021-11-12 22:37:34,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 1.2831661092530657) internal successors, (1151), 897 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:34,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1151 transitions. [2021-11-12 22:37:34,226 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1151 transitions. Word has length 128 [2021-11-12 22:37:34,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:37:34,227 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 1151 transitions. [2021-11-12 22:37:34,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:34,227 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1151 transitions. [2021-11-12 22:37:34,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 22:37:34,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:37:34,230 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:37:34,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-12 22:37:34,230 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:37:34,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:37:34,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1212229378, now seen corresponding path program 1 times [2021-11-12 22:37:34,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:37:34,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742266131] [2021-11-12 22:37:34,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:37:34,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:37:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:37:34,323 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:37:34,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742266131] [2021-11-12 22:37:34,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742266131] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:37:34,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:37:34,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:37:34,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272437766] [2021-11-12 22:37:34,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:37:34,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:37:34,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:37:34,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:37:34,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:37:34,325 INFO L87 Difference]: Start difference. First operand 898 states and 1151 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:34,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:37:34,595 INFO L93 Difference]: Finished difference Result 2207 states and 2888 transitions. [2021-11-12 22:37:34,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:37:34,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-12 22:37:34,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:37:34,605 INFO L225 Difference]: With dead ends: 2207 [2021-11-12 22:37:34,605 INFO L226 Difference]: Without dead ends: 1550 [2021-11-12 22:37:34,608 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 [2021-11-12 22:37:34,609 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 43 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.60ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.46ms IncrementalHoareTripleChecker+Time [2021-11-12 22:37:34,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 309 Invalid, 38 Unknown, 0 Unchecked, 0.60ms Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 43.46ms Time] [2021-11-12 22:37:34,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2021-11-12 22:37:34,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1488. [2021-11-12 22:37:34,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 1.2945527908540686) internal successors, (1925), 1487 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:34,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 1925 transitions. [2021-11-12 22:37:34,855 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 1925 transitions. Word has length 131 [2021-11-12 22:37:34,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:37:34,856 INFO L470 AbstractCegarLoop]: Abstraction has 1488 states and 1925 transitions. [2021-11-12 22:37:34,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:34,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 1925 transitions. [2021-11-12 22:37:34,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-12 22:37:34,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:37:34,858 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:37:34,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-12 22:37:34,858 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:37:34,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:37:34,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1247148985, now seen corresponding path program 1 times [2021-11-12 22:37:34,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:37:34,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206887947] [2021-11-12 22:37:34,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:37:34,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:37:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:37:34,925 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:37:34,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206887947] [2021-11-12 22:37:34,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206887947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:37:34,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:37:34,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:37:34,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342975334] [2021-11-12 22:37:34,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:37:34,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:37:34,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:37:34,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:37:34,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:37:34,930 INFO L87 Difference]: Start difference. First operand 1488 states and 1925 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:35,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:37:35,372 INFO L93 Difference]: Finished difference Result 3959 states and 5190 transitions. [2021-11-12 22:37:35,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:37:35,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-12 22:37:35,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:37:35,388 INFO L225 Difference]: With dead ends: 3959 [2021-11-12 22:37:35,388 INFO L226 Difference]: Without dead ends: 2724 [2021-11-12 22:37:35,390 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 [2021-11-12 22:37:35,391 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 38 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.62ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.61ms IncrementalHoareTripleChecker+Time [2021-11-12 22:37:35,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 302 Invalid, 39 Unknown, 0 Unchecked, 0.62ms Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 40.61ms Time] [2021-11-12 22:37:35,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-11-12 22:37:35,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 2614. [2021-11-12 22:37:35,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2614 states, 2613 states have (on average 1.2992728664370456) internal successors, (3395), 2613 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:35,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2614 states to 2614 states and 3395 transitions. [2021-11-12 22:37:35,802 INFO L78 Accepts]: Start accepts. Automaton has 2614 states and 3395 transitions. Word has length 134 [2021-11-12 22:37:35,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:37:35,802 INFO L470 AbstractCegarLoop]: Abstraction has 2614 states and 3395 transitions. [2021-11-12 22:37:35,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:35,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2614 states and 3395 transitions. [2021-11-12 22:37:35,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 22:37:35,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:37:35,804 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:37:35,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-12 22:37:35,805 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:37:35,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:37:35,806 INFO L85 PathProgramCache]: Analyzing trace with hash 88155242, now seen corresponding path program 1 times [2021-11-12 22:37:35,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:37:35,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671930804] [2021-11-12 22:37:35,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:37:35,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:37:35,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:37:35,875 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:37:35,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671930804] [2021-11-12 22:37:35,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671930804] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:37:35,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:37:35,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:37:35,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448157809] [2021-11-12 22:37:35,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:37:35,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:37:35,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:37:35,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:37:35,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:37:35,878 INFO L87 Difference]: Start difference. First operand 2614 states and 3395 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:36,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:37:36,694 INFO L93 Difference]: Finished difference Result 7319 states and 9580 transitions. [2021-11-12 22:37:36,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:37:36,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-12 22:37:36,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:37:36,723 INFO L225 Difference]: With dead ends: 7319 [2021-11-12 22:37:36,723 INFO L226 Difference]: Without dead ends: 4970 [2021-11-12 22:37:36,730 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 [2021-11-12 22:37:36,731 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 33 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.70ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.58ms IncrementalHoareTripleChecker+Time [2021-11-12 22:37:36,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 295 Invalid, 40 Unknown, 0 Unchecked, 0.70ms Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 42.58ms Time] [2021-11-12 22:37:36,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4970 states. [2021-11-12 22:37:37,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4970 to 4764. [2021-11-12 22:37:37,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4764 states, 4763 states have (on average 1.2985513331933656) internal successors, (6185), 4763 states have internal predecessors, (6185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:37,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4764 states to 4764 states and 6185 transitions. [2021-11-12 22:37:37,410 INFO L78 Accepts]: Start accepts. Automaton has 4764 states and 6185 transitions. Word has length 137 [2021-11-12 22:37:37,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:37:37,410 INFO L470 AbstractCegarLoop]: Abstraction has 4764 states and 6185 transitions. [2021-11-12 22:37:37,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:37,411 INFO L276 IsEmpty]: Start isEmpty. Operand 4764 states and 6185 transitions. [2021-11-12 22:37:37,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-12 22:37:37,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:37:37,412 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:37:37,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-12 22:37:37,413 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:37:37,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:37:37,414 INFO L85 PathProgramCache]: Analyzing trace with hash 570714560, now seen corresponding path program 1 times [2021-11-12 22:37:37,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:37:37,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681844233] [2021-11-12 22:37:37,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:37:37,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:37:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:37:37,479 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:37:37,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681844233] [2021-11-12 22:37:37,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681844233] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:37:37,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:37:37,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:37:37,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909143518] [2021-11-12 22:37:37,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:37:37,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:37:37,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:37:37,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:37:37,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:37:37,482 INFO L87 Difference]: Start difference. First operand 4764 states and 6185 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:38,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:37:38,689 INFO L93 Difference]: Finished difference Result 13749 states and 17927 transitions. [2021-11-12 22:37:38,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:37:38,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 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 140 [2021-11-12 22:37:38,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:37:38,733 INFO L225 Difference]: With dead ends: 13749 [2021-11-12 22:37:38,734 INFO L226 Difference]: Without dead ends: 9262 [2021-11-12 22:37:38,742 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 [2021-11-12 22:37:38,743 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 29 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.48ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.73ms IncrementalHoareTripleChecker+Time [2021-11-12 22:37:38,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 297 Invalid, 36 Unknown, 0 Unchecked, 0.48ms Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 35.73ms Time] [2021-11-12 22:37:38,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9262 states. [2021-11-12 22:37:40,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9262 to 8868. [2021-11-12 22:37:40,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8868 states, 8867 states have (on average 1.2940115033269426) internal successors, (11474), 8867 states have internal predecessors, (11474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:40,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8868 states to 8868 states and 11474 transitions. [2021-11-12 22:37:40,087 INFO L78 Accepts]: Start accepts. Automaton has 8868 states and 11474 transitions. Word has length 140 [2021-11-12 22:37:40,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:37:40,088 INFO L470 AbstractCegarLoop]: Abstraction has 8868 states and 11474 transitions. [2021-11-12 22:37:40,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:40,088 INFO L276 IsEmpty]: Start isEmpty. Operand 8868 states and 11474 transitions. [2021-11-12 22:37:40,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-12 22:37:40,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:37:40,090 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:37:40,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-12 22:37:40,091 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:37:40,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:37:40,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1549749247, now seen corresponding path program 1 times [2021-11-12 22:37:40,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:37:40,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166616139] [2021-11-12 22:37:40,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:37:40,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:37:40,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:40,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:37:40,151 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:37:40,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166616139] [2021-11-12 22:37:40,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166616139] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:37:40,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:37:40,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:37:40,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456631463] [2021-11-12 22:37:40,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:37:40,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:37:40,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:37:40,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:37:40,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:37:40,153 INFO L87 Difference]: Start difference. First operand 8868 states and 11474 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:41,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:37:41,264 INFO L93 Difference]: Finished difference Result 17498 states and 22677 transitions. [2021-11-12 22:37:41,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:37:41,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 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 145 [2021-11-12 22:37:41,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:37:41,305 INFO L225 Difference]: With dead ends: 17498 [2021-11-12 22:37:41,306 INFO L226 Difference]: Without dead ends: 8771 [2021-11-12 22:37:41,319 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 [2021-11-12 22:37:41,320 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 62 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.57ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 84.01ms IncrementalHoareTripleChecker+Time [2021-11-12 22:37:41,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 340 Invalid, 29 Unknown, 0 Unchecked, 0.57ms Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 84.01ms Time] [2021-11-12 22:37:41,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8771 states. [2021-11-12 22:37:42,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8771 to 8216. [2021-11-12 22:37:42,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8216 states, 8215 states have (on average 1.2813146682897139) internal successors, (10526), 8215 states have internal predecessors, (10526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:42,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8216 states to 8216 states and 10526 transitions. [2021-11-12 22:37:42,501 INFO L78 Accepts]: Start accepts. Automaton has 8216 states and 10526 transitions. Word has length 145 [2021-11-12 22:37:42,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:37:42,501 INFO L470 AbstractCegarLoop]: Abstraction has 8216 states and 10526 transitions. [2021-11-12 22:37:42,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:42,502 INFO L276 IsEmpty]: Start isEmpty. Operand 8216 states and 10526 transitions. [2021-11-12 22:37:42,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-12 22:37:42,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:37:42,504 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:37:42,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-12 22:37:42,505 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:37:42,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:37:42,506 INFO L85 PathProgramCache]: Analyzing trace with hash 186931594, now seen corresponding path program 1 times [2021-11-12 22:37:42,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:37:42,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781086145] [2021-11-12 22:37:42,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:37:42,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:37:42,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:37:42,672 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:37:42,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781086145] [2021-11-12 22:37:42,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781086145] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:37:42,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:37:42,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 22:37:42,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320199614] [2021-11-12 22:37:42,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:37:42,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:37:42,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:37:42,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:37:42,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:37:42,674 INFO L87 Difference]: Start difference. First operand 8216 states and 10526 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:43,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:37:43,703 INFO L93 Difference]: Finished difference Result 16326 states and 20944 transitions. [2021-11-12 22:37:43,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:37:43,703 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 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 165 [2021-11-12 22:37:43,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:37:43,719 INFO L225 Difference]: With dead ends: 16326 [2021-11-12 22:37:43,720 INFO L226 Difference]: Without dead ends: 8216 [2021-11-12 22:37:43,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:37:43,731 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 528 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.10ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 134.67ms IncrementalHoareTripleChecker+Time [2021-11-12 22:37:43,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 155 Invalid, 170 Unknown, 0 Unchecked, 1.10ms Time], IncrementalHoareTripleChecker [7 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 134.67ms Time] [2021-11-12 22:37:43,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8216 states. [2021-11-12 22:37:45,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8216 to 8216. [2021-11-12 22:37:45,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8216 states, 8215 states have (on average 1.2617163724893488) internal successors, (10365), 8215 states have internal predecessors, (10365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:45,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8216 states to 8216 states and 10365 transitions. [2021-11-12 22:37:45,128 INFO L78 Accepts]: Start accepts. Automaton has 8216 states and 10365 transitions. Word has length 165 [2021-11-12 22:37:45,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:37:45,128 INFO L470 AbstractCegarLoop]: Abstraction has 8216 states and 10365 transitions. [2021-11-12 22:37:45,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:45,129 INFO L276 IsEmpty]: Start isEmpty. Operand 8216 states and 10365 transitions. [2021-11-12 22:37:45,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-12 22:37:45,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:37:45,132 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:37:45,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-12 22:37:45,133 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:37:45,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:37:45,134 INFO L85 PathProgramCache]: Analyzing trace with hash -469782587, now seen corresponding path program 1 times [2021-11-12 22:37:45,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:37:45,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101620437] [2021-11-12 22:37:45,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:37:45,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:37:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat