./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-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_a0d4cb1e-f46f-45f6-88c0-53f9f4e060c1/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4cb1e-f46f-45f6-88c0-53f9f4e060c1/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_a0d4cb1e-f46f-45f6-88c0-53f9f4e060c1/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4cb1e-f46f-45f6-88c0-53f9f4e060c1/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4cb1e-f46f-45f6-88c0-53f9f4e060c1/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_a0d4cb1e-f46f-45f6-88c0-53f9f4e060c1/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 d7923672572112c1e23e765d37ba0d9265e37954a51bbbf4393296aaafd9ce3e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:39:49,796 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:39:49,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:39:49,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:39:49,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:39:49,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:39:49,858 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:39:49,862 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:39:49,865 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:39:49,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:39:49,872 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:39:49,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:39:49,874 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:39:49,880 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:39:49,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:39:49,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:39:49,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:39:49,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:39:49,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:39:49,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:39:49,901 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:39:49,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:39:49,906 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:39:49,907 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:39:49,915 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:39:49,916 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:39:49,916 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:39:49,918 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:39:49,918 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:39:49,920 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:39:49,920 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:39:49,921 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:39:49,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:39:49,924 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:39:49,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:39:49,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:39:49,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:39:49,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:39:49,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:39:49,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:39:49,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:39:49,929 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4cb1e-f46f-45f6-88c0-53f9f4e060c1/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:39:49,969 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:39:49,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:39:49,970 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:39:49,971 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:39:49,971 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:39:49,971 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:39:49,971 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:39:49,971 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:39:49,972 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:39:49,972 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:39:49,978 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:39:49,979 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:39:49,979 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:39:49,979 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:39:49,979 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:39:49,980 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:39:49,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:39:49,981 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:39:49,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:39:49,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:39:49,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:39:49,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:39:49,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:39:49,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:39:49,982 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:39:49,982 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:39:49,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:39:49,982 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:39:49,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:39:49,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:39:49,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:39:49,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:39:49,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:39:49,985 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:39:49,985 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:39:49,986 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:39:49,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:39:49,986 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:39:49,986 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:39:49,986 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:39:49,986 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_a0d4cb1e-f46f-45f6-88c0-53f9f4e060c1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4cb1e-f46f-45f6-88c0-53f9f4e060c1/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7923672572112c1e23e765d37ba0d9265e37954a51bbbf4393296aaafd9ce3e [2021-11-12 22:39:50,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:39:50,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:39:50,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:39:50,304 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:39:50,305 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:39:50,306 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4cb1e-f46f-45f6-88c0-53f9f4e060c1/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-12 22:39:50,368 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4cb1e-f46f-45f6-88c0-53f9f4e060c1/bin/utaipan-vmNK8stdcF/data/2497a01c3/7e9078a6d1724b2db6a785a8a220bc9f/FLAGa8d54ea19 [2021-11-12 22:39:51,041 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:39:51,041 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4cb1e-f46f-45f6-88c0-53f9f4e060c1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-12 22:39:51,074 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4cb1e-f46f-45f6-88c0-53f9f4e060c1/bin/utaipan-vmNK8stdcF/data/2497a01c3/7e9078a6d1724b2db6a785a8a220bc9f/FLAGa8d54ea19 [2021-11-12 22:39:51,201 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4cb1e-f46f-45f6-88c0-53f9f4e060c1/bin/utaipan-vmNK8stdcF/data/2497a01c3/7e9078a6d1724b2db6a785a8a220bc9f [2021-11-12 22:39:51,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:39:51,206 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:39:51,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:39:51,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:39:51,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:39:51,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:39:51" (1/1) ... [2021-11-12 22:39:51,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e447310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:39:51, skipping insertion in model container [2021-11-12 22:39:51,216 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:39:51" (1/1) ... [2021-11-12 22:39:51,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:39:51,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:39:51,719 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_a0d4cb1e-f46f-45f6-88c0-53f9f4e060c1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[9988,10001] [2021-11-12 22:39:51,896 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_a0d4cb1e-f46f-45f6-88c0-53f9f4e060c1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[24517,24530] [2021-11-12 22:39:52,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:39:52,111 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:39:52,191 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_a0d4cb1e-f46f-45f6-88c0-53f9f4e060c1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[9988,10001] [2021-11-12 22:39:52,264 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_a0d4cb1e-f46f-45f6-88c0-53f9f4e060c1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[24517,24530] [2021-11-12 22:39:52,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:39:52,491 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:39:52,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:39:52 WrapperNode [2021-11-12 22:39:52,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:39:52,493 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:39:52,493 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:39:52,493 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:39:52,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:39:52" (1/1) ... [2021-11-12 22:39:52,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:39:52" (1/1) ... [2021-11-12 22:39:52,637 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:39:52,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:39:52,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:39:52,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:39:52,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:39:52" (1/1) ... [2021-11-12 22:39:52,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:39:52" (1/1) ... [2021-11-12 22:39:52,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:39:52" (1/1) ... [2021-11-12 22:39:52,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:39:52" (1/1) ... [2021-11-12 22:39:52,705 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:39:52" (1/1) ... [2021-11-12 22:39:52,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:39:52" (1/1) ... [2021-11-12 22:39:52,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:39:52" (1/1) ... [2021-11-12 22:39:52,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:39:52,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:39:52,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:39:52,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:39:52,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:39:52" (1/1) ... [2021-11-12 22:39:52,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:39:52,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4cb1e-f46f-45f6-88c0-53f9f4e060c1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:39:52,800 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4cb1e-f46f-45f6-88c0-53f9f4e060c1/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:39:52,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4cb1e-f46f-45f6-88c0-53f9f4e060c1/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:39:52,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 22:39:52,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:39:52,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:39:52,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:39:55,173 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:39:55,173 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 22:39:55,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:39:55 BoogieIcfgContainer [2021-11-12 22:39:55,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:39:55,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:39:55,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:39:55,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:39:55,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:39:51" (1/3) ... [2021-11-12 22:39:55,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@866bece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:39:55, skipping insertion in model container [2021-11-12 22:39:55,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:39:52" (2/3) ... [2021-11-12 22:39:55,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@866bece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:39:55, skipping insertion in model container [2021-11-12 22:39:55,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:39:55" (3/3) ... [2021-11-12 22:39:55,187 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-12 22:39:55,195 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:39:55,195 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-12 22:39:55,259 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:39:55,268 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 22:39:55,268 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-12 22:39:55,309 INFO L276 IsEmpty]: Start isEmpty. Operand has 662 states, 659 states have (on average 1.7890743550834598) internal successors, (1179), 661 states have internal predecessors, (1179), 0 states have call successors, (0), 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 22:39:55,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-12 22:39:55,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:55,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:39:55,332 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:55,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:55,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1229301387, now seen corresponding path program 1 times [2021-11-12 22:39:55,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:39:55,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493374246] [2021-11-12 22:39:55,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:55,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:39:55,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:55,762 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 22:39:55,762 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:39:55,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493374246] [2021-11-12 22:39:55,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493374246] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:55,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:39:55,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:39:55,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261453110] [2021-11-12 22:39:55,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:55,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:39:55,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:39:55,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:39:55,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:39:55,813 INFO L87 Difference]: Start difference. First operand has 662 states, 659 states have (on average 1.7890743550834598) internal successors, (1179), 661 states have internal predecessors, (1179), 0 states have call successors, (0), 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 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:39:56,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:56,058 INFO L93 Difference]: Finished difference Result 959 states and 1669 transitions. [2021-11-12 22:39:56,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:39:56,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-12 22:39:56,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:56,093 INFO L225 Difference]: With dead ends: 959 [2021-11-12 22:39:56,093 INFO L226 Difference]: Without dead ends: 779 [2021-11-12 22:39:56,098 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 22:39:56,105 INFO L933 BasicCegarLoop]: 1166 mSDtfsCounter, 588 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1916 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.07ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 111.63ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:56,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 1916 Invalid, 31 Unknown, 0 Unchecked, 21.07ms Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 111.63ms Time] [2021-11-12 22:39:56,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-11-12 22:39:56,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 777. [2021-11-12 22:39:56,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 775 states have (on average 1.343225806451613) internal successors, (1041), 776 states have internal predecessors, (1041), 0 states have call successors, (0), 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 22:39:56,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1041 transitions. [2021-11-12 22:39:56,204 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1041 transitions. Word has length 61 [2021-11-12 22:39:56,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:56,205 INFO L470 AbstractCegarLoop]: Abstraction has 777 states and 1041 transitions. [2021-11-12 22:39:56,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:39:56,231 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1041 transitions. [2021-11-12 22:39:56,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-12 22:39:56,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:56,236 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:39:56,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 22:39:56,237 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:56,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:56,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1202740473, now seen corresponding path program 1 times [2021-11-12 22:39:56,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:39:56,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473867751] [2021-11-12 22:39:56,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:56,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:39:56,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:56,341 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 22:39:56,341 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:39:56,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473867751] [2021-11-12 22:39:56,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473867751] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:56,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:39:56,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:39:56,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267708243] [2021-11-12 22:39:56,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:56,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:39:56,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:39:56,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:39:56,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:39:56,345 INFO L87 Difference]: Start difference. First operand 777 states and 1041 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:39:56,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:56,511 INFO L93 Difference]: Finished difference Result 1290 states and 1726 transitions. [2021-11-12 22:39:56,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:39:56,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-12 22:39:56,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:56,519 INFO L225 Difference]: With dead ends: 1290 [2021-11-12 22:39:56,519 INFO L226 Difference]: Without dead ends: 1107 [2021-11-12 22:39:56,521 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 22:39:56,523 INFO L933 BasicCegarLoop]: 951 mSDtfsCounter, 499 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 94.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.62ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 117.92ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:56,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 1525 Invalid, 97 Unknown, 0 Unchecked, 4.62ms Time], IncrementalHoareTripleChecker [38 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 117.92ms Time] [2021-11-12 22:39:56,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-11-12 22:39:56,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1103. [2021-11-12 22:39:56,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1101 states have (on average 1.32425068119891) internal successors, (1458), 1102 states have internal predecessors, (1458), 0 states have call successors, (0), 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 22:39:56,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1458 transitions. [2021-11-12 22:39:56,574 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1458 transitions. Word has length 62 [2021-11-12 22:39:56,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:56,575 INFO L470 AbstractCegarLoop]: Abstraction has 1103 states and 1458 transitions. [2021-11-12 22:39:56,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:39:56,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1458 transitions. [2021-11-12 22:39:56,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-12 22:39:56,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:56,580 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:39:56,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 22:39:56,581 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:56,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:56,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1419941485, now seen corresponding path program 1 times [2021-11-12 22:39:56,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:39:56,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112677953] [2021-11-12 22:39:56,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:56,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:39:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:56,665 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 22:39:56,665 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:39:56,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112677953] [2021-11-12 22:39:56,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112677953] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:56,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:39:56,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:39:56,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212875565] [2021-11-12 22:39:56,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:56,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:39:56,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:39:56,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:39:56,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:39:56,669 INFO L87 Difference]: Start difference. First operand 1103 states and 1458 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:39:56,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:56,786 INFO L93 Difference]: Finished difference Result 1896 states and 2572 transitions. [2021-11-12 22:39:56,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:39:56,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-12 22:39:56,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:56,796 INFO L225 Difference]: With dead ends: 1896 [2021-11-12 22:39:56,796 INFO L226 Difference]: Without dead ends: 1478 [2021-11-12 22:39:56,798 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 22:39:56,799 INFO L933 BasicCegarLoop]: 863 mSDtfsCounter, 445 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.01ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59.44ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:56,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 1419 Invalid, 50 Unknown, 0 Unchecked, 4.01ms Time], IncrementalHoareTripleChecker [14 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 59.44ms Time] [2021-11-12 22:39:56,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-11-12 22:39:56,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1474. [2021-11-12 22:39:56,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1472 states have (on average 1.3376358695652173) internal successors, (1969), 1473 states have internal predecessors, (1969), 0 states have call successors, (0), 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 22:39:56,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 1969 transitions. [2021-11-12 22:39:56,862 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 1969 transitions. Word has length 62 [2021-11-12 22:39:56,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:56,863 INFO L470 AbstractCegarLoop]: Abstraction has 1474 states and 1969 transitions. [2021-11-12 22:39:56,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:39:56,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 1969 transitions. [2021-11-12 22:39:56,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-12 22:39:56,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:56,897 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:39:56,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 22:39:56,898 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:56,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:56,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1452563052, now seen corresponding path program 1 times [2021-11-12 22:39:56,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:39:56,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564830403] [2021-11-12 22:39:56,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:56,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:39:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:57,045 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 22:39:57,046 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:39:57,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564830403] [2021-11-12 22:39:57,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564830403] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:57,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:39:57,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:39:57,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483755569] [2021-11-12 22:39:57,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:57,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:39:57,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:39:57,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:39:57,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:39:57,049 INFO L87 Difference]: Start difference. First operand 1474 states and 1969 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:39:57,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:57,609 INFO L93 Difference]: Finished difference Result 3114 states and 4236 transitions. [2021-11-12 22:39:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:39:57,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-12 22:39:57,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:57,622 INFO L225 Difference]: With dead ends: 3114 [2021-11-12 22:39:57,622 INFO L226 Difference]: Without dead ends: 1863 [2021-11-12 22:39:57,625 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 22:39:57,634 INFO L933 BasicCegarLoop]: 399 mSDtfsCounter, 2227 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 335.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2227 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.45ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 416.27ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:57,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2227 Valid, 502 Invalid, 416 Unknown, 0 Unchecked, 8.45ms Time], IncrementalHoareTripleChecker [14 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 416.27ms Time] [2021-11-12 22:39:57,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2021-11-12 22:39:57,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1861. [2021-11-12 22:39:57,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1861 states, 1859 states have (on average 1.3550295857988166) internal successors, (2519), 1860 states have internal predecessors, (2519), 0 states have call successors, (0), 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 22:39:57,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1861 states to 1861 states and 2519 transitions. [2021-11-12 22:39:57,794 INFO L78 Accepts]: Start accepts. Automaton has 1861 states and 2519 transitions. Word has length 62 [2021-11-12 22:39:57,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:57,795 INFO L470 AbstractCegarLoop]: Abstraction has 1861 states and 2519 transitions. [2021-11-12 22:39:57,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:39:57,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1861 states and 2519 transitions. [2021-11-12 22:39:57,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-12 22:39:57,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:57,799 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] [2021-11-12 22:39:57,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 22:39:57,799 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:57,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:57,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1875740527, now seen corresponding path program 1 times [2021-11-12 22:39:57,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:39:57,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556716504] [2021-11-12 22:39:57,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:57,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:39:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:57,868 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 22:39:57,869 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:39:57,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556716504] [2021-11-12 22:39:57,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556716504] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:57,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:39:57,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:39:57,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514414819] [2021-11-12 22:39:57,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:57,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:39:57,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:39:57,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:39:57,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:39:57,876 INFO L87 Difference]: Start difference. First operand 1861 states and 2519 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:39:58,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:58,091 INFO L93 Difference]: Finished difference Result 3997 states and 5482 transitions. [2021-11-12 22:39:58,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:39:58,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-12 22:39:58,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:58,111 INFO L225 Difference]: With dead ends: 3997 [2021-11-12 22:39:58,111 INFO L226 Difference]: Without dead ends: 2876 [2021-11-12 22:39:58,114 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 22:39:58,117 INFO L933 BasicCegarLoop]: 863 mSDtfsCounter, 537 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.99ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.60ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:58,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 1325 Invalid, 34 Unknown, 0 Unchecked, 3.99ms Time], IncrementalHoareTripleChecker [6 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 43.60ms Time] [2021-11-12 22:39:58,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-11-12 22:39:58,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2874. [2021-11-12 22:39:58,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2874 states, 2872 states have (on average 1.3506267409470751) internal successors, (3879), 2873 states have internal predecessors, (3879), 0 states have call successors, (0), 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 22:39:58,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2874 states to 2874 states and 3879 transitions. [2021-11-12 22:39:58,362 INFO L78 Accepts]: Start accepts. Automaton has 2874 states and 3879 transitions. Word has length 63 [2021-11-12 22:39:58,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:58,363 INFO L470 AbstractCegarLoop]: Abstraction has 2874 states and 3879 transitions. [2021-11-12 22:39:58,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:39:58,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2874 states and 3879 transitions. [2021-11-12 22:39:58,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-12 22:39:58,370 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:58,370 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] [2021-11-12 22:39:58,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 22:39:58,373 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:58,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:58,374 INFO L85 PathProgramCache]: Analyzing trace with hash 143702479, now seen corresponding path program 1 times [2021-11-12 22:39:58,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:39:58,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622035201] [2021-11-12 22:39:58,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:58,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:39:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:58,471 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 22:39:58,471 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:39:58,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622035201] [2021-11-12 22:39:58,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622035201] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:58,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:39:58,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:39:58,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980040784] [2021-11-12 22:39:58,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:58,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:39:58,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:39:58,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:39:58,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:39:58,474 INFO L87 Difference]: Start difference. First operand 2874 states and 3879 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:39:59,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:59,247 INFO L93 Difference]: Finished difference Result 6684 states and 9132 transitions. [2021-11-12 22:39:59,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:39:59,247 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-12 22:39:59,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:59,273 INFO L225 Difference]: With dead ends: 6684 [2021-11-12 22:39:59,273 INFO L226 Difference]: Without dead ends: 4143 [2021-11-12 22:39:59,280 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 22:39:59,282 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 1948 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 339.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1948 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.08ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 412.86ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:59,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1948 Valid, 436 Invalid, 377 Unknown, 0 Unchecked, 8.08ms Time], IncrementalHoareTripleChecker [24 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 412.86ms Time] [2021-11-12 22:39:59,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2021-11-12 22:39:59,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 4139. [2021-11-12 22:39:59,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4139 states, 4137 states have (on average 1.3579888808315204) internal successors, (5618), 4138 states have internal predecessors, (5618), 0 states have call successors, (0), 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 22:39:59,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 5618 transitions. [2021-11-12 22:39:59,632 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 5618 transitions. Word has length 64 [2021-11-12 22:39:59,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:59,633 INFO L470 AbstractCegarLoop]: Abstraction has 4139 states and 5618 transitions. [2021-11-12 22:39:59,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:39:59,633 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 5618 transitions. [2021-11-12 22:39:59,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-12 22:39:59,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:59,639 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] [2021-11-12 22:39:59,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 22:39:59,639 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:59,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:59,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1303417230, now seen corresponding path program 1 times [2021-11-12 22:39:59,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:39:59,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740923119] [2021-11-12 22:39:59,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:59,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:39:59,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:59,737 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 22:39:59,737 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:39:59,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740923119] [2021-11-12 22:39:59,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740923119] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:59,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:39:59,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:39:59,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392874345] [2021-11-12 22:39:59,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:59,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:39:59,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:39:59,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:39:59,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:39:59,758 INFO L87 Difference]: Start difference. First operand 4139 states and 5618 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 22:40:00,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:00,674 INFO L93 Difference]: Finished difference Result 10721 states and 14692 transitions. [2021-11-12 22:40:00,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:40:00,675 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-12 22:40:00,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:00,715 INFO L225 Difference]: With dead ends: 10721 [2021-11-12 22:40:00,715 INFO L226 Difference]: Without dead ends: 6866 [2021-11-12 22:40:00,721 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 22:40:00,722 INFO L933 BasicCegarLoop]: 368 mSDtfsCounter, 1961 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 308.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1961 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.99ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 378.04ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:00,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1961 Valid, 471 Invalid, 370 Unknown, 0 Unchecked, 6.99ms Time], IncrementalHoareTripleChecker [6 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 378.04ms Time] [2021-11-12 22:40:00,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6866 states. [2021-11-12 22:40:01,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6866 to 5339. [2021-11-12 22:40:01,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5339 states, 5337 states have (on average 1.3672475173318344) internal successors, (7297), 5338 states have internal predecessors, (7297), 0 states have call successors, (0), 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 22:40:01,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5339 states to 5339 states and 7297 transitions. [2021-11-12 22:40:01,174 INFO L78 Accepts]: Start accepts. Automaton has 5339 states and 7297 transitions. Word has length 65 [2021-11-12 22:40:01,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:01,175 INFO L470 AbstractCegarLoop]: Abstraction has 5339 states and 7297 transitions. [2021-11-12 22:40:01,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 22:40:01,175 INFO L276 IsEmpty]: Start isEmpty. Operand 5339 states and 7297 transitions. [2021-11-12 22:40:01,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-12 22:40:01,180 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:01,181 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] [2021-11-12 22:40:01,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 22:40:01,181 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:01,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:01,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1163054926, now seen corresponding path program 1 times [2021-11-12 22:40:01,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:01,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290008714] [2021-11-12 22:40:01,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:01,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:01,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:01,266 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 22:40:01,267 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:01,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290008714] [2021-11-12 22:40:01,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290008714] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:01,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:01,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 22:40:01,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309762728] [2021-11-12 22:40:01,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:01,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:40:01,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:01,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:40:01,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:40:01,269 INFO L87 Difference]: Start difference. First operand 5339 states and 7297 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 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 22:40:03,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:03,470 INFO L93 Difference]: Finished difference Result 19626 states and 27358 transitions. [2021-11-12 22:40:03,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:40:03,471 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-12 22:40:03,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:03,548 INFO L225 Difference]: With dead ends: 19626 [2021-11-12 22:40:03,548 INFO L226 Difference]: Without dead ends: 18351 [2021-11-12 22:40:03,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:40:03,556 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 3845 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 526.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3845 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.87ms SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 669.78ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:03,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3845 Valid, 854 Invalid, 922 Unknown, 0 Unchecked, 14.87ms Time], IncrementalHoareTripleChecker [223 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 669.78ms Time] [2021-11-12 22:40:03,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18351 states. [2021-11-12 22:40:04,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18351 to 5363. [2021-11-12 22:40:04,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5363 states, 5361 states have (on average 1.3670956911024064) internal successors, (7329), 5362 states have internal predecessors, (7329), 0 states have call successors, (0), 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 22:40:04,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5363 states to 5363 states and 7329 transitions. [2021-11-12 22:40:04,187 INFO L78 Accepts]: Start accepts. Automaton has 5363 states and 7329 transitions. Word has length 65 [2021-11-12 22:40:04,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:04,188 INFO L470 AbstractCegarLoop]: Abstraction has 5363 states and 7329 transitions. [2021-11-12 22:40:04,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 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 22:40:04,190 INFO L276 IsEmpty]: Start isEmpty. Operand 5363 states and 7329 transitions. [2021-11-12 22:40:04,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-12 22:40:04,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:04,201 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] [2021-11-12 22:40:04,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 22:40:04,202 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:04,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:04,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1311593556, now seen corresponding path program 1 times [2021-11-12 22:40:04,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:04,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580927948] [2021-11-12 22:40:04,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:04,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:04,302 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 22:40:04,302 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:04,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580927948] [2021-11-12 22:40:04,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580927948] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:04,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:04,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 22:40:04,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930348226] [2021-11-12 22:40:04,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:04,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:40:04,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:04,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:40:04,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:40:04,305 INFO L87 Difference]: Start difference. First operand 5363 states and 7329 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 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 22:40:06,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:06,602 INFO L93 Difference]: Finished difference Result 19402 states and 26665 transitions. [2021-11-12 22:40:06,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:40:06,602 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-11-12 22:40:06,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:06,644 INFO L225 Difference]: With dead ends: 19402 [2021-11-12 22:40:06,644 INFO L226 Difference]: Without dead ends: 17278 [2021-11-12 22:40:06,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:40:06,653 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 3441 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 514.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3441 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.24ms SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 641.42ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:06,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3441 Valid, 784 Invalid, 845 Unknown, 0 Unchecked, 12.24ms Time], IncrementalHoareTripleChecker [234 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 641.42ms Time] [2021-11-12 22:40:06,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17278 states. [2021-11-12 22:40:07,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17278 to 5391. [2021-11-12 22:40:07,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5391 states, 5389 states have (on average 1.3666728521061422) internal successors, (7365), 5390 states have internal predecessors, (7365), 0 states have call successors, (0), 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 22:40:07,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5391 states to 5391 states and 7365 transitions. [2021-11-12 22:40:07,430 INFO L78 Accepts]: Start accepts. Automaton has 5391 states and 7365 transitions. Word has length 66 [2021-11-12 22:40:07,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:07,430 INFO L470 AbstractCegarLoop]: Abstraction has 5391 states and 7365 transitions. [2021-11-12 22:40:07,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 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 22:40:07,431 INFO L276 IsEmpty]: Start isEmpty. Operand 5391 states and 7365 transitions. [2021-11-12 22:40:07,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-12 22:40:07,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:07,437 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] [2021-11-12 22:40:07,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 22:40:07,437 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:07,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:07,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1448174587, now seen corresponding path program 1 times [2021-11-12 22:40:07,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:07,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872880924] [2021-11-12 22:40:07,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:07,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:07,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:07,491 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 22:40:07,492 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:07,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872880924] [2021-11-12 22:40:07,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872880924] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:07,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:07,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:40:07,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041578172] [2021-11-12 22:40:07,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:07,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:40:07,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:07,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:40:07,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:40:07,494 INFO L87 Difference]: Start difference. First operand 5391 states and 7365 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 22:40:08,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:08,693 INFO L93 Difference]: Finished difference Result 14126 states and 19386 transitions. [2021-11-12 22:40:08,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:40:08,694 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-11-12 22:40:08,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:08,715 INFO L225 Difference]: With dead ends: 14126 [2021-11-12 22:40:08,715 INFO L226 Difference]: Without dead ends: 9042 [2021-11-12 22:40:08,722 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 22:40:08,723 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 1797 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 300.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1797 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.44ms SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 373.59ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:08,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1797 Valid, 393 Invalid, 377 Unknown, 0 Unchecked, 6.44ms Time], IncrementalHoareTripleChecker [51 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 373.59ms Time] [2021-11-12 22:40:08,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9042 states. [2021-11-12 22:40:09,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9042 to 9038. [2021-11-12 22:40:09,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9038 states, 9036 states have (on average 1.3602257636122177) internal successors, (12291), 9037 states have internal predecessors, (12291), 0 states have call successors, (0), 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 22:40:09,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9038 states to 9038 states and 12291 transitions. [2021-11-12 22:40:09,694 INFO L78 Accepts]: Start accepts. Automaton has 9038 states and 12291 transitions. Word has length 66 [2021-11-12 22:40:09,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:09,695 INFO L470 AbstractCegarLoop]: Abstraction has 9038 states and 12291 transitions. [2021-11-12 22:40:09,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 22:40:09,696 INFO L276 IsEmpty]: Start isEmpty. Operand 9038 states and 12291 transitions. [2021-11-12 22:40:09,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 22:40:09,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:09,703 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] [2021-11-12 22:40:09,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 22:40:09,703 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:09,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:09,704 INFO L85 PathProgramCache]: Analyzing trace with hash 251496623, now seen corresponding path program 1 times [2021-11-12 22:40:09,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:09,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310027557] [2021-11-12 22:40:09,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:09,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:09,815 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 22:40:09,816 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:09,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310027557] [2021-11-12 22:40:09,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310027557] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:09,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:09,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 22:40:09,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903136645] [2021-11-12 22:40:09,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:09,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:40:09,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:09,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:40:09,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:40:09,819 INFO L87 Difference]: Start difference. First operand 9038 states and 12291 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:14,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:14,261 INFO L93 Difference]: Finished difference Result 43102 states and 59446 transitions. [2021-11-12 22:40:14,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:40:14,261 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-12 22:40:14,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:14,339 INFO L225 Difference]: With dead ends: 43102 [2021-11-12 22:40:14,340 INFO L226 Difference]: Without dead ends: 39380 [2021-11-12 22:40:14,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:40:14,355 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 3402 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 466.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3402 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.33ms SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 583.78ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:14,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3402 Valid, 845 Invalid, 886 Unknown, 0 Unchecked, 10.33ms Time], IncrementalHoareTripleChecker [232 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 583.78ms Time] [2021-11-12 22:40:14,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39380 states. [2021-11-12 22:40:15,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39380 to 9135. [2021-11-12 22:40:15,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9135 states, 9133 states have (on average 1.3599036461184715) internal successors, (12420), 9134 states have internal predecessors, (12420), 0 states have call successors, (0), 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 22:40:15,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9135 states to 9135 states and 12420 transitions. [2021-11-12 22:40:15,837 INFO L78 Accepts]: Start accepts. Automaton has 9135 states and 12420 transitions. Word has length 67 [2021-11-12 22:40:15,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:15,837 INFO L470 AbstractCegarLoop]: Abstraction has 9135 states and 12420 transitions. [2021-11-12 22:40:15,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:15,838 INFO L276 IsEmpty]: Start isEmpty. Operand 9135 states and 12420 transitions. [2021-11-12 22:40:15,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 22:40:15,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:15,845 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] [2021-11-12 22:40:15,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-12 22:40:15,846 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:15,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:15,846 INFO L85 PathProgramCache]: Analyzing trace with hash 288337870, now seen corresponding path program 1 times [2021-11-12 22:40:15,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:15,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520568463] [2021-11-12 22:40:15,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:15,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:15,971 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 22:40:15,971 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:15,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520568463] [2021-11-12 22:40:15,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520568463] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:15,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:15,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-12 22:40:15,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562996484] [2021-11-12 22:40:15,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:15,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:40:15,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:15,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:40:15,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:40:15,973 INFO L87 Difference]: Start difference. First operand 9135 states and 12420 transitions. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 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 22:40:19,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:19,790 INFO L93 Difference]: Finished difference Result 27549 states and 37644 transitions. [2021-11-12 22:40:19,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 22:40:19,790 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-12 22:40:19,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:19,825 INFO L225 Difference]: With dead ends: 27549 [2021-11-12 22:40:19,826 INFO L226 Difference]: Without dead ends: 20595 [2021-11-12 22:40:19,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:40:19,839 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 2138 mSDsluCounter, 1187 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 670.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2138 SdHoareTripleChecker+Valid, 1581 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.79ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 825.70ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:19,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2138 Valid, 1581 Invalid, 1491 Unknown, 0 Unchecked, 9.79ms Time], IncrementalHoareTripleChecker [70 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 825.70ms Time] [2021-11-12 22:40:19,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20595 states. [2021-11-12 22:40:21,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20595 to 9131. [2021-11-12 22:40:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9131 states, 9129 states have (on average 1.3596231788804907) internal successors, (12412), 9130 states have internal predecessors, (12412), 0 states have call successors, (0), 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 22:40:21,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9131 states to 9131 states and 12412 transitions. [2021-11-12 22:40:21,118 INFO L78 Accepts]: Start accepts. Automaton has 9131 states and 12412 transitions. Word has length 68 [2021-11-12 22:40:21,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:21,118 INFO L470 AbstractCegarLoop]: Abstraction has 9131 states and 12412 transitions. [2021-11-12 22:40:21,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 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 22:40:21,119 INFO L276 IsEmpty]: Start isEmpty. Operand 9131 states and 12412 transitions. [2021-11-12 22:40:21,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 22:40:21,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:21,128 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] [2021-11-12 22:40:21,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-12 22:40:21,128 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:21,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:21,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1656089935, now seen corresponding path program 1 times [2021-11-12 22:40:21,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:21,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213360506] [2021-11-12 22:40:21,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:21,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:21,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:21,346 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 22:40:21,346 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:21,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213360506] [2021-11-12 22:40:21,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213360506] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:21,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:21,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-12 22:40:21,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058671041] [2021-11-12 22:40:21,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:21,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:40:21,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:21,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:40:21,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:40:21,349 INFO L87 Difference]: Start difference. First operand 9131 states and 12412 transitions. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 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 22:40:27,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:27,152 INFO L93 Difference]: Finished difference Result 30948 states and 41882 transitions. [2021-11-12 22:40:27,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-12 22:40:27,153 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-12 22:40:27,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:27,200 INFO L225 Difference]: With dead ends: 30948 [2021-11-12 22:40:27,200 INFO L226 Difference]: Without dead ends: 28617 [2021-11-12 22:40:27,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-11-12 22:40:27,214 INFO L933 BasicCegarLoop]: 456 mSDtfsCounter, 2417 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 2075 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1124.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2417 SdHoareTripleChecker+Valid, 2149 SdHoareTripleChecker+Invalid, 2123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.94ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1343.54ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:27,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2417 Valid, 2149 Invalid, 2123 Unknown, 0 Unchecked, 13.94ms Time], IncrementalHoareTripleChecker [48 Valid, 2075 Invalid, 0 Unknown, 0 Unchecked, 1343.54ms Time] [2021-11-12 22:40:27,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28617 states. [2021-11-12 22:40:28,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28617 to 9131. [2021-11-12 22:40:28,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9131 states, 9129 states have (on average 1.3594040968342644) internal successors, (12410), 9130 states have internal predecessors, (12410), 0 states have call successors, (0), 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 22:40:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9131 states to 9131 states and 12410 transitions. [2021-11-12 22:40:28,653 INFO L78 Accepts]: Start accepts. Automaton has 9131 states and 12410 transitions. Word has length 68 [2021-11-12 22:40:28,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:28,653 INFO L470 AbstractCegarLoop]: Abstraction has 9131 states and 12410 transitions. [2021-11-12 22:40:28,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 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 22:40:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 9131 states and 12410 transitions. [2021-11-12 22:40:28,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 22:40:28,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:28,662 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] [2021-11-12 22:40:28,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-12 22:40:28,662 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:28,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:28,663 INFO L85 PathProgramCache]: Analyzing trace with hash -583929423, now seen corresponding path program 1 times [2021-11-12 22:40:28,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:28,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977001361] [2021-11-12 22:40:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:28,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:28,775 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 22:40:28,776 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:28,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977001361] [2021-11-12 22:40:28,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977001361] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:28,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:28,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-12 22:40:28,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52775164] [2021-11-12 22:40:28,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:28,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:40:28,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:28,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:40:28,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:40:28,778 INFO L87 Difference]: Start difference. First operand 9131 states and 12410 transitions. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 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 22:40:32,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:32,775 INFO L93 Difference]: Finished difference Result 29459 states and 40259 transitions. [2021-11-12 22:40:32,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 22:40:32,776 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-12 22:40:32,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:32,805 INFO L225 Difference]: With dead ends: 29459 [2021-11-12 22:40:32,805 INFO L226 Difference]: Without dead ends: 22471 [2021-11-12 22:40:32,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:40:32,818 INFO L933 BasicCegarLoop]: 435 mSDtfsCounter, 1919 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 1328 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 544.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1919 SdHoareTripleChecker+Valid, 1610 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.55ms SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 702.27ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:32,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1919 Valid, 1610 Invalid, 1395 Unknown, 0 Unchecked, 13.55ms Time], IncrementalHoareTripleChecker [67 Valid, 1328 Invalid, 0 Unknown, 0 Unchecked, 702.27ms Time] [2021-11-12 22:40:32,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22471 states. [2021-11-12 22:40:34,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22471 to 9111. [2021-11-12 22:40:34,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9111 states, 9109 states have (on average 1.3588758370842025) internal successors, (12378), 9110 states have internal predecessors, (12378), 0 states have call successors, (0), 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 22:40:34,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9111 states to 9111 states and 12378 transitions. [2021-11-12 22:40:34,431 INFO L78 Accepts]: Start accepts. Automaton has 9111 states and 12378 transitions. Word has length 69 [2021-11-12 22:40:34,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:34,431 INFO L470 AbstractCegarLoop]: Abstraction has 9111 states and 12378 transitions. [2021-11-12 22:40:34,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 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 22:40:34,432 INFO L276 IsEmpty]: Start isEmpty. Operand 9111 states and 12378 transitions. [2021-11-12 22:40:34,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 22:40:34,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:34,440 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] [2021-11-12 22:40:34,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-12 22:40:34,441 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:34,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:34,441 INFO L85 PathProgramCache]: Analyzing trace with hash -843555950, now seen corresponding path program 1 times [2021-11-12 22:40:34,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:34,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383947063] [2021-11-12 22:40:34,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:34,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:34,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:34,844 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 22:40:34,845 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:34,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383947063] [2021-11-12 22:40:34,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383947063] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:34,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:34,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-12 22:40:34,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710700351] [2021-11-12 22:40:34,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:34,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:40:34,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:34,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:40:34,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:40:34,848 INFO L87 Difference]: Start difference. First operand 9111 states and 12378 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 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 22:40:50,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:50,519 INFO L93 Difference]: Finished difference Result 73299 states and 100511 transitions. [2021-11-12 22:40:50,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-12 22:40:50,519 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-12 22:40:50,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:50,628 INFO L225 Difference]: With dead ends: 73299 [2021-11-12 22:40:50,629 INFO L226 Difference]: Without dead ends: 66147 [2021-11-12 22:40:50,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=429, Invalid=1551, Unknown=0, NotChecked=0, Total=1980 [2021-11-12 22:40:50,650 INFO L933 BasicCegarLoop]: 1089 mSDtfsCounter, 4646 mSDsluCounter, 7153 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 836.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4646 SdHoareTripleChecker+Valid, 7989 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.68ms SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1001.68ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:50,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4646 Valid, 7989 Invalid, 1340 Unknown, 0 Unchecked, 25.68ms Time], IncrementalHoareTripleChecker [129 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 1001.68ms Time] [2021-11-12 22:40:50,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66147 states. [2021-11-12 22:40:53,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66147 to 8901. [2021-11-12 22:40:53,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8901 states, 8899 states have (on average 1.3601528261602427) internal successors, (12104), 8900 states have internal predecessors, (12104), 0 states have call successors, (0), 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 22:40:53,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8901 states to 8901 states and 12104 transitions. [2021-11-12 22:40:53,157 INFO L78 Accepts]: Start accepts. Automaton has 8901 states and 12104 transitions. Word has length 69 [2021-11-12 22:40:53,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:53,158 INFO L470 AbstractCegarLoop]: Abstraction has 8901 states and 12104 transitions. [2021-11-12 22:40:53,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 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 22:40:53,158 INFO L276 IsEmpty]: Start isEmpty. Operand 8901 states and 12104 transitions. [2021-11-12 22:40:53,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 22:40:53,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:53,164 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] [2021-11-12 22:40:53,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-12 22:40:53,165 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:53,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:53,165 INFO L85 PathProgramCache]: Analyzing trace with hash -48339803, now seen corresponding path program 1 times [2021-11-12 22:40:53,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:53,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128310383] [2021-11-12 22:40:53,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:53,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:53,238 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 22:40:53,238 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:53,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128310383] [2021-11-12 22:40:53,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128310383] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:53,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:53,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 22:40:53,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959879932] [2021-11-12 22:40:53,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:53,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:40:53,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:53,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:40:53,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:40:53,241 INFO L87 Difference]: Start difference. First operand 8901 states and 12104 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 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 22:41:02,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:02,540 INFO L93 Difference]: Finished difference Result 37803 states and 51998 transitions. [2021-11-12 22:41:02,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:41:02,541 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-12 22:41:02,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:02,593 INFO L225 Difference]: With dead ends: 37803 [2021-11-12 22:41:02,594 INFO L226 Difference]: Without dead ends: 34245 [2021-11-12 22:41:02,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:41:02,606 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 2381 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 508.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2381 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.95ms SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 630.74ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:02,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2381 Valid, 874 Invalid, 951 Unknown, 0 Unchecked, 9.95ms Time], IncrementalHoareTripleChecker [204 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 630.74ms Time] [2021-11-12 22:41:02,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34245 states. [2021-11-12 22:41:04,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34245 to 8972. [2021-11-12 22:41:04,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8972 states, 8970 states have (on average 1.3604236343366778) internal successors, (12203), 8971 states have internal predecessors, (12203), 0 states have call successors, (0), 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 22:41:04,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8972 states to 8972 states and 12203 transitions. [2021-11-12 22:41:04,935 INFO L78 Accepts]: Start accepts. Automaton has 8972 states and 12203 transitions. Word has length 69 [2021-11-12 22:41:04,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:41:04,936 INFO L470 AbstractCegarLoop]: Abstraction has 8972 states and 12203 transitions. [2021-11-12 22:41:04,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 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 22:41:04,936 INFO L276 IsEmpty]: Start isEmpty. Operand 8972 states and 12203 transitions. [2021-11-12 22:41:04,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 22:41:04,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:04,943 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] [2021-11-12 22:41:04,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-12 22:41:04,944 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:04,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:04,944 INFO L85 PathProgramCache]: Analyzing trace with hash 764464694, now seen corresponding path program 1 times [2021-11-12 22:41:04,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:41:04,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983191213] [2021-11-12 22:41:04,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:04,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:41:04,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:05,233 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 22:41:05,233 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:41:05,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983191213] [2021-11-12 22:41:05,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983191213] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:41:05,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:41:05,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-12 22:41:05,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482410747] [2021-11-12 22:41:05,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:41:05,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:41:05,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:41:05,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:41:05,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:41:05,235 INFO L87 Difference]: Start difference. First operand 8972 states and 12203 transitions. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 10 states have internal predecessors, (69), 0 states have call successors, (0), 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 22:41:15,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:15,407 INFO L93 Difference]: Finished difference Result 41229 states and 56768 transitions. [2021-11-12 22:41:15,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 22:41:15,408 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 10 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-12 22:41:15,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:15,468 INFO L225 Difference]: With dead ends: 41229 [2021-11-12 22:41:15,468 INFO L226 Difference]: Without dead ends: 34151 [2021-11-12 22:41:15,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:41:15,481 INFO L933 BasicCegarLoop]: 752 mSDtfsCounter, 1397 mSDsluCounter, 3967 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 516.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1397 SdHoareTripleChecker+Valid, 4621 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.12ms SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 629.54ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:15,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1397 Valid, 4621 Invalid, 992 Unknown, 0 Unchecked, 17.12ms Time], IncrementalHoareTripleChecker [47 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 629.54ms Time] [2021-11-12 22:41:15,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34151 states. [2021-11-12 22:41:17,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34151 to 8832. [2021-11-12 22:41:17,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8832 states, 8830 states have (on average 1.3613816534541336) internal successors, (12021), 8831 states have internal predecessors, (12021), 0 states have call successors, (0), 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 22:41:17,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8832 states to 8832 states and 12021 transitions. [2021-11-12 22:41:17,878 INFO L78 Accepts]: Start accepts. Automaton has 8832 states and 12021 transitions. Word has length 69 [2021-11-12 22:41:17,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:41:17,878 INFO L470 AbstractCegarLoop]: Abstraction has 8832 states and 12021 transitions. [2021-11-12 22:41:17,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 10 states have internal predecessors, (69), 0 states have call successors, (0), 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 22:41:17,879 INFO L276 IsEmpty]: Start isEmpty. Operand 8832 states and 12021 transitions. [2021-11-12 22:41:17,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-12 22:41:17,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:17,885 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] [2021-11-12 22:41:17,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-12 22:41:17,885 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:17,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:17,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1937241439, now seen corresponding path program 1 times [2021-11-12 22:41:17,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:41:17,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933200935] [2021-11-12 22:41:17,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:17,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:41:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:18,350 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 22:41:18,350 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:41:18,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933200935] [2021-11-12 22:41:18,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933200935] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:41:18,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:41:18,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-12 22:41:18,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850554496] [2021-11-12 22:41:18,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:41:18,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:41:18,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:41:18,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:41:18,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:41:18,353 INFO L87 Difference]: Start difference. First operand 8832 states and 12021 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:41:40,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:40,544 INFO L93 Difference]: Finished difference Result 64191 states and 88128 transitions. [2021-11-12 22:41:40,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-12 22:41:40,544 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-12 22:41:40,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:40,640 INFO L225 Difference]: With dead ends: 64191 [2021-11-12 22:41:40,641 INFO L226 Difference]: Without dead ends: 57181 [2021-11-12 22:41:40,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2021-11-12 22:41:40,657 INFO L933 BasicCegarLoop]: 1220 mSDtfsCounter, 3795 mSDsluCounter, 7378 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1001.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3795 SdHoareTripleChecker+Valid, 8343 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.20ms SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1183.08ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:40,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3795 Valid, 8343 Invalid, 1470 Unknown, 0 Unchecked, 24.20ms Time], IncrementalHoareTripleChecker [135 Valid, 1335 Invalid, 0 Unknown, 0 Unchecked, 1183.08ms Time] [2021-11-12 22:41:40,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57181 states. [2021-11-12 22:41:43,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57181 to 8768. [2021-11-12 22:41:43,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8768 states, 8767 states have (on average 1.3606706969316755) internal successors, (11929), 8767 states have internal predecessors, (11929), 0 states have call successors, (0), 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 22:41:43,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8768 states to 8768 states and 11929 transitions. [2021-11-12 22:41:43,422 INFO L78 Accepts]: Start accepts. Automaton has 8768 states and 11929 transitions. Word has length 70 [2021-11-12 22:41:43,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:41:43,423 INFO L470 AbstractCegarLoop]: Abstraction has 8768 states and 11929 transitions. [2021-11-12 22:41:43,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:41:43,423 INFO L276 IsEmpty]: Start isEmpty. Operand 8768 states and 11929 transitions. [2021-11-12 22:41:43,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-12 22:41:43,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:43,429 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] [2021-11-12 22:41:43,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-12 22:41:43,429 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:43,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:43,430 INFO L85 PathProgramCache]: Analyzing trace with hash -615241948, now seen corresponding path program 1 times [2021-11-12 22:41:43,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:41:43,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615438429] [2021-11-12 22:41:43,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:43,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:41:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:43,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:41:43,506 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:41:43,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615438429] [2021-11-12 22:41:43,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615438429] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:41:43,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:41:43,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 22:41:43,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777047454] [2021-11-12 22:41:43,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:41:43,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:41:43,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:41:43,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:41:43,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:41:43,509 INFO L87 Difference]: Start difference. First operand 8768 states and 11929 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:41:57,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:57,365 INFO L93 Difference]: Finished difference Result 42355 states and 58475 transitions. [2021-11-12 22:41:57,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:41:57,365 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-12 22:41:57,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:57,424 INFO L225 Difference]: With dead ends: 42355 [2021-11-12 22:41:57,424 INFO L226 Difference]: Without dead ends: 38751 [2021-11-12 22:41:57,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:41:57,436 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 2397 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 465.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2397 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.24ms SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 577.36ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:57,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2397 Valid, 841 Invalid, 845 Unknown, 0 Unchecked, 8.24ms Time], IncrementalHoareTripleChecker [173 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 577.36ms Time] [2021-11-12 22:41:57,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38751 states. [2021-11-12 22:42:00,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38751 to 8798. [2021-11-12 22:42:00,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8798 states, 8797 states have (on average 1.3605774695919064) internal successors, (11969), 8797 states have internal predecessors, (11969), 0 states have call successors, (0), 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 22:42:00,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8798 states to 8798 states and 11969 transitions. [2021-11-12 22:42:00,427 INFO L78 Accepts]: Start accepts. Automaton has 8798 states and 11969 transitions. Word has length 70 [2021-11-12 22:42:00,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:00,428 INFO L470 AbstractCegarLoop]: Abstraction has 8798 states and 11969 transitions. [2021-11-12 22:42:00,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:42:00,428 INFO L276 IsEmpty]: Start isEmpty. Operand 8798 states and 11969 transitions. [2021-11-12 22:42:00,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-12 22:42:00,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:00,433 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] [2021-11-12 22:42:00,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-12 22:42:00,433 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:00,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:00,434 INFO L85 PathProgramCache]: Analyzing trace with hash 2007440010, now seen corresponding path program 1 times [2021-11-12 22:42:00,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:42:00,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509279839] [2021-11-12 22:42:00,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:00,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:42:00,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:00,577 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 22:42:00,577 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:42:00,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509279839] [2021-11-12 22:42:00,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509279839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:00,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:00,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-12 22:42:00,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175173602] [2021-11-12 22:42:00,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:00,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:42:00,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:42:00,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:42:00,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:42:00,580 INFO L87 Difference]: Start difference. First operand 8798 states and 11969 transitions. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:42:12,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:12,368 INFO L93 Difference]: Finished difference Result 35055 states and 47976 transitions. [2021-11-12 22:42:12,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 22:42:12,368 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-12 22:42:12,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:12,414 INFO L225 Difference]: With dead ends: 35055 [2021-11-12 22:42:12,414 INFO L226 Difference]: Without dead ends: 27847 [2021-11-12 22:42:12,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-11-12 22:42:12,424 INFO L933 BasicCegarLoop]: 468 mSDtfsCounter, 2144 mSDsluCounter, 1581 mSDsCounter, 0 mSdLazyCounter, 1674 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 769.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2144 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.08ms SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 942.48ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:12,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2144 Valid, 2034 Invalid, 1753 Unknown, 0 Unchecked, 11.08ms Time], IncrementalHoareTripleChecker [79 Valid, 1674 Invalid, 0 Unknown, 0 Unchecked, 942.48ms Time] [2021-11-12 22:42:12,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27847 states. [2021-11-12 22:42:15,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27847 to 8661. [2021-11-12 22:42:15,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8661 states, 8660 states have (on average 1.3603926096997692) internal successors, (11781), 8660 states have internal predecessors, (11781), 0 states have call successors, (0), 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 22:42:15,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8661 states to 8661 states and 11781 transitions. [2021-11-12 22:42:15,660 INFO L78 Accepts]: Start accepts. Automaton has 8661 states and 11781 transitions. Word has length 70 [2021-11-12 22:42:15,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:15,660 INFO L470 AbstractCegarLoop]: Abstraction has 8661 states and 11781 transitions. [2021-11-12 22:42:15,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:42:15,660 INFO L276 IsEmpty]: Start isEmpty. Operand 8661 states and 11781 transitions. [2021-11-12 22:42:15,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 22:42:15,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:15,665 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] [2021-11-12 22:42:15,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-12 22:42:15,666 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:15,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:15,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1894019455, now seen corresponding path program 1 times [2021-11-12 22:42:15,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:42:15,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188376424] [2021-11-12 22:42:15,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:15,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:42:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:16,056 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 22:42:16,056 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:42:16,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188376424] [2021-11-12 22:42:16,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188376424] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:16,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:16,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-12 22:42:16,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034960676] [2021-11-12 22:42:16,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:16,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:42:16,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:42:16,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:42:16,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:42:16,058 INFO L87 Difference]: Start difference. First operand 8661 states and 11781 transitions. Second operand has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 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 22:42:28,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:28,873 INFO L93 Difference]: Finished difference Result 30251 states and 41444 transitions. [2021-11-12 22:42:28,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:42:28,874 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-11-12 22:42:28,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:28,911 INFO L225 Difference]: With dead ends: 30251 [2021-11-12 22:42:28,912 INFO L226 Difference]: Without dead ends: 26687 [2021-11-12 22:42:28,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:42:28,919 INFO L933 BasicCegarLoop]: 584 mSDtfsCounter, 2686 mSDsluCounter, 2395 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 546.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2686 SdHoareTripleChecker+Valid, 2925 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.08ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 654.43ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:28,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2686 Valid, 2925 Invalid, 901 Unknown, 0 Unchecked, 12.08ms Time], IncrementalHoareTripleChecker [25 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 654.43ms Time] [2021-11-12 22:42:28,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26687 states. [2021-11-12 22:42:32,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26687 to 8652. [2021-11-12 22:42:32,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8652 states, 8651 states have (on average 1.3604207606057104) internal successors, (11769), 8651 states have internal predecessors, (11769), 0 states have call successors, (0), 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 22:42:32,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8652 states to 8652 states and 11769 transitions. [2021-11-12 22:42:32,321 INFO L78 Accepts]: Start accepts. Automaton has 8652 states and 11769 transitions. Word has length 71 [2021-11-12 22:42:32,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:32,321 INFO L470 AbstractCegarLoop]: Abstraction has 8652 states and 11769 transitions. [2021-11-12 22:42:32,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 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 22:42:32,322 INFO L276 IsEmpty]: Start isEmpty. Operand 8652 states and 11769 transitions. [2021-11-12 22:42:32,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 22:42:32,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:32,327 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] [2021-11-12 22:42:32,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-12 22:42:32,327 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:32,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:32,328 INFO L85 PathProgramCache]: Analyzing trace with hash -764275833, now seen corresponding path program 1 times [2021-11-12 22:42:32,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:42:32,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451970052] [2021-11-12 22:42:32,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:32,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:42:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:32,414 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 22:42:32,414 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:42:32,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451970052] [2021-11-12 22:42:32,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451970052] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:32,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:32,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 22:42:32,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661763921] [2021-11-12 22:42:32,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:32,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:42:32,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:42:32,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:42:32,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:42:32,417 INFO L87 Difference]: Start difference. First operand 8652 states and 11769 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 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 22:42:36,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:36,660 INFO L93 Difference]: Finished difference Result 13916 states and 18969 transitions. [2021-11-12 22:42:36,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:42:36,662 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-11-12 22:42:36,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:36,673 INFO L225 Difference]: With dead ends: 13916 [2021-11-12 22:42:36,674 INFO L226 Difference]: Without dead ends: 10145 [2021-11-12 22:42:36,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:42:36,678 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 1025 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 144.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 1231 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.68ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 177.82ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:36,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1025 Valid, 1231 Invalid, 209 Unknown, 0 Unchecked, 4.68ms Time], IncrementalHoareTripleChecker [41 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 177.82ms Time] [2021-11-12 22:42:36,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10145 states. [2021-11-12 22:42:40,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10145 to 9767. [2021-11-12 22:42:40,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.3467130862174892) internal successors, (13152), 9766 states have internal predecessors, (13152), 0 states have call successors, (0), 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 22:42:40,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 13152 transitions. [2021-11-12 22:42:40,572 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 13152 transitions. Word has length 71 [2021-11-12 22:42:40,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:40,572 INFO L470 AbstractCegarLoop]: Abstraction has 9767 states and 13152 transitions. [2021-11-12 22:42:40,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 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 22:42:40,572 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 13152 transitions. [2021-11-12 22:42:40,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-12 22:42:40,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:40,580 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] [2021-11-12 22:42:40,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-12 22:42:40,580 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:40,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:40,581 INFO L85 PathProgramCache]: Analyzing trace with hash 590821425, now seen corresponding path program 1 times [2021-11-12 22:42:40,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:42:40,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517899873] [2021-11-12 22:42:40,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:40,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:42:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:40,622 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 22:42:40,622 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:42:40,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517899873] [2021-11-12 22:42:40,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517899873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:40,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:40,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:42:40,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456996377] [2021-11-12 22:42:40,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:40,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:42:40,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:42:40,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:42:40,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:42:40,625 INFO L87 Difference]: Start difference. First operand 9767 states and 13152 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 22:42:44,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:44,406 INFO L93 Difference]: Finished difference Result 13191 states and 17794 transitions. [2021-11-12 22:42:44,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:42:44,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-11-12 22:42:44,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:44,417 INFO L225 Difference]: With dead ends: 13191 [2021-11-12 22:42:44,417 INFO L226 Difference]: Without dead ends: 9389 [2021-11-12 22:42:44,421 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 22:42:44,422 INFO L933 BasicCegarLoop]: 539 mSDtfsCounter, 273 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.01ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.61ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:44,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 953 Invalid, 24 Unknown, 0 Unchecked, 2.01ms Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 26.61ms Time] [2021-11-12 22:42:44,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9389 states. [2021-11-12 22:42:48,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9389 to 9387. [2021-11-12 22:42:48,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9387 states, 9386 states have (on average 1.3323034306413808) internal successors, (12505), 9386 states have internal predecessors, (12505), 0 states have call successors, (0), 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 22:42:48,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9387 states to 9387 states and 12505 transitions. [2021-11-12 22:42:48,183 INFO L78 Accepts]: Start accepts. Automaton has 9387 states and 12505 transitions. Word has length 72 [2021-11-12 22:42:48,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:48,183 INFO L470 AbstractCegarLoop]: Abstraction has 9387 states and 12505 transitions. [2021-11-12 22:42:48,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 22:42:48,184 INFO L276 IsEmpty]: Start isEmpty. Operand 9387 states and 12505 transitions. [2021-11-12 22:42:48,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-12 22:42:48,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:48,188 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] [2021-11-12 22:42:48,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-12 22:42:48,189 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:48,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:48,189 INFO L85 PathProgramCache]: Analyzing trace with hash -275978777, now seen corresponding path program 1 times [2021-11-12 22:42:48,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:42:48,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491518779] [2021-11-12 22:42:48,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:48,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:42:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:48,240 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 22:42:48,240 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:42:48,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491518779] [2021-11-12 22:42:48,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491518779] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:48,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:48,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:42:48,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982848897] [2021-11-12 22:42:48,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:48,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:42:48,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:42:48,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:42:48,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:42:48,243 INFO L87 Difference]: Start difference. First operand 9387 states and 12505 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 22:42:54,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:54,724 INFO L93 Difference]: Finished difference Result 19653 states and 26507 transitions. [2021-11-12 22:42:54,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:42:54,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-11-12 22:42:54,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:54,742 INFO L225 Difference]: With dead ends: 19653 [2021-11-12 22:42:54,742 INFO L226 Difference]: Without dead ends: 14639 [2021-11-12 22:42:54,746 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 22:42:54,747 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 147 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.72ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.73ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:54,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 880 Invalid, 27 Unknown, 0 Unchecked, 2.72ms Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 27.73ms Time] [2021-11-12 22:42:54,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14639 states. [2021-11-12 22:43:00,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14639 to 13877. [2021-11-12 22:43:00,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13877 states, 13876 states have (on average 1.3298501008936292) internal successors, (18453), 13876 states have internal predecessors, (18453), 0 states have call successors, (0), 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 22:43:00,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13877 states to 13877 states and 18453 transitions. [2021-11-12 22:43:00,725 INFO L78 Accepts]: Start accepts. Automaton has 13877 states and 18453 transitions. Word has length 72 [2021-11-12 22:43:00,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:43:00,725 INFO L470 AbstractCegarLoop]: Abstraction has 13877 states and 18453 transitions. [2021-11-12 22:43:00,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 22:43:00,726 INFO L276 IsEmpty]: Start isEmpty. Operand 13877 states and 18453 transitions. [2021-11-12 22:43:00,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 22:43:00,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:43:00,730 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] [2021-11-12 22:43:00,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-12 22:43:00,730 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:43:00,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:43:00,730 INFO L85 PathProgramCache]: Analyzing trace with hash 355936382, now seen corresponding path program 1 times [2021-11-12 22:43:00,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:43:00,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214829801] [2021-11-12 22:43:00,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:43:00,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:43:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:43:00,769 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 22:43:00,769 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:43:00,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214829801] [2021-11-12 22:43:00,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214829801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:43:00,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:43:00,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:43:00,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559121839] [2021-11-12 22:43:00,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:43:00,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:43:00,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:43:00,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:43:00,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:43:00,772 INFO L87 Difference]: Start difference. First operand 13877 states and 18453 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:43:09,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:43:09,151 INFO L93 Difference]: Finished difference Result 25660 states and 34109 transitions. [2021-11-12 22:43:09,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:43:09,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-12 22:43:09,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:43:09,173 INFO L225 Difference]: With dead ends: 25660 [2021-11-12 22:43:09,173 INFO L226 Difference]: Without dead ends: 18214 [2021-11-12 22:43:09,179 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 22:43:09,180 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 338 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.44ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.44ms IncrementalHoareTripleChecker+Time [2021-11-12 22:43:09,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 492 Invalid, 57 Unknown, 0 Unchecked, 2.44ms Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 48.44ms Time] [2021-11-12 22:43:09,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18214 states. [2021-11-12 22:43:17,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18214 to 18212. [2021-11-12 22:43:17,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18212 states, 18211 states have (on average 1.3256273680742408) internal successors, (24141), 18211 states have internal predecessors, (24141), 0 states have call successors, (0), 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 22:43:17,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18212 states to 18212 states and 24141 transitions. [2021-11-12 22:43:17,285 INFO L78 Accepts]: Start accepts. Automaton has 18212 states and 24141 transitions. Word has length 73 [2021-11-12 22:43:17,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:43:17,285 INFO L470 AbstractCegarLoop]: Abstraction has 18212 states and 24141 transitions. [2021-11-12 22:43:17,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:43:17,285 INFO L276 IsEmpty]: Start isEmpty. Operand 18212 states and 24141 transitions. [2021-11-12 22:43:17,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 22:43:17,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:43:17,291 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] [2021-11-12 22:43:17,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-12 22:43:17,291 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:43:17,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:43:17,291 INFO L85 PathProgramCache]: Analyzing trace with hash 79843687, now seen corresponding path program 1 times [2021-11-12 22:43:17,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:43:17,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814323594] [2021-11-12 22:43:17,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:43:17,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:43:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:43:17,329 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 22:43:17,329 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:43:17,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814323594] [2021-11-12 22:43:17,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814323594] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:43:17,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:43:17,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:43:17,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677948446] [2021-11-12 22:43:17,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:43:17,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:43:17,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:43:17,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:43:17,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:43:17,332 INFO L87 Difference]: Start difference. First operand 18212 states and 24141 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:43:26,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:43:26,180 INFO L93 Difference]: Finished difference Result 28839 states and 38213 transitions. [2021-11-12 22:43:26,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:43:26,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-12 22:43:26,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:43:26,207 INFO L225 Difference]: With dead ends: 28839 [2021-11-12 22:43:26,207 INFO L226 Difference]: Without dead ends: 19609 [2021-11-12 22:43:26,219 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 22:43:26,219 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 336 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.66ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.79ms IncrementalHoareTripleChecker+Time [2021-11-12 22:43:26,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 583 Invalid, 49 Unknown, 0 Unchecked, 2.66ms Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 42.79ms Time] [2021-11-12 22:43:26,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19609 states. [2021-11-12 22:43:32,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19609 to 15116. [2021-11-12 22:43:32,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15116 states, 15115 states have (on average 1.3212041018855443) internal successors, (19970), 15115 states have internal predecessors, (19970), 0 states have call successors, (0), 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 22:43:32,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15116 states to 15116 states and 19970 transitions. [2021-11-12 22:43:32,919 INFO L78 Accepts]: Start accepts. Automaton has 15116 states and 19970 transitions. Word has length 73 [2021-11-12 22:43:32,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:43:32,919 INFO L470 AbstractCegarLoop]: Abstraction has 15116 states and 19970 transitions. [2021-11-12 22:43:32,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:43:32,919 INFO L276 IsEmpty]: Start isEmpty. Operand 15116 states and 19970 transitions. [2021-11-12 22:43:32,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-12 22:43:32,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:43:32,923 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] [2021-11-12 22:43:32,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-12 22:43:32,923 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:43:32,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:43:32,923 INFO L85 PathProgramCache]: Analyzing trace with hash -535922221, now seen corresponding path program 1 times [2021-11-12 22:43:32,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:43:32,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766431653] [2021-11-12 22:43:32,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:43:32,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:43:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:43:33,017 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 22:43:33,017 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:43:33,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766431653] [2021-11-12 22:43:33,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766431653] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:43:33,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:43:33,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-12 22:43:33,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246723753] [2021-11-12 22:43:33,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:43:33,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:43:33,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:43:33,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:43:33,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:43:33,020 INFO L87 Difference]: Start difference. First operand 15116 states and 19970 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 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 22:43:42,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:43:42,735 INFO L93 Difference]: Finished difference Result 24738 states and 32558 transitions. [2021-11-12 22:43:42,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 22:43:42,736 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-11-12 22:43:42,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:43:42,758 INFO L225 Difference]: With dead ends: 24738 [2021-11-12 22:43:42,758 INFO L226 Difference]: Without dead ends: 20272 [2021-11-12 22:43:42,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:43:42,766 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 1456 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 431.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1456 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.21ms SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 528.24ms IncrementalHoareTripleChecker+Time [2021-11-12 22:43:42,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1456 Valid, 1131 Invalid, 1046 Unknown, 0 Unchecked, 7.21ms Time], IncrementalHoareTripleChecker [54 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 528.24ms Time] [2021-11-12 22:43:42,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20272 states. [2021-11-12 22:43:49,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20272 to 15112. [2021-11-12 22:43:49,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15112 states, 15111 states have (on average 1.3210905962543842) internal successors, (19963), 15111 states have internal predecessors, (19963), 0 states have call successors, (0), 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 22:43:49,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15112 states to 15112 states and 19963 transitions. [2021-11-12 22:43:49,415 INFO L78 Accepts]: Start accepts. Automaton has 15112 states and 19963 transitions. Word has length 74 [2021-11-12 22:43:49,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:43:49,416 INFO L470 AbstractCegarLoop]: Abstraction has 15112 states and 19963 transitions. [2021-11-12 22:43:49,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 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 22:43:49,416 INFO L276 IsEmpty]: Start isEmpty. Operand 15112 states and 19963 transitions. [2021-11-12 22:43:49,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-12 22:43:49,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:43:49,418 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] [2021-11-12 22:43:49,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-12 22:43:49,419 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:43:49,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:43:49,419 INFO L85 PathProgramCache]: Analyzing trace with hash 2086759737, now seen corresponding path program 1 times [2021-11-12 22:43:49,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:43:49,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547965414] [2021-11-12 22:43:49,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:43:49,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:43:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:43:49,592 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 22:43:49,592 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:43:49,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547965414] [2021-11-12 22:43:49,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547965414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:43:49,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:43:49,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-12 22:43:49,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93226598] [2021-11-12 22:43:49,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:43:49,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:43:49,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:43:49,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:43:49,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:43:49,594 INFO L87 Difference]: Start difference. First operand 15112 states and 19963 transitions. Second operand has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 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 22:44:20,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:44:20,783 INFO L93 Difference]: Finished difference Result 65841 states and 87066 transitions. [2021-11-12 22:44:20,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-12 22:44:20,783 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-11-12 22:44:20,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:44:20,873 INFO L225 Difference]: With dead ends: 65841 [2021-11-12 22:44:20,874 INFO L226 Difference]: Without dead ends: 60014 [2021-11-12 22:44:20,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=390, Invalid=1170, Unknown=0, NotChecked=0, Total=1560 [2021-11-12 22:44:20,888 INFO L933 BasicCegarLoop]: 463 mSDtfsCounter, 3260 mSDsluCounter, 1516 mSDsCounter, 0 mSdLazyCounter, 1884 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1066.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3260 SdHoareTripleChecker+Valid, 1966 SdHoareTripleChecker+Invalid, 2132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.51ms SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1303.02ms IncrementalHoareTripleChecker+Time [2021-11-12 22:44:20,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3260 Valid, 1966 Invalid, 2132 Unknown, 0 Unchecked, 15.51ms Time], IncrementalHoareTripleChecker [248 Valid, 1884 Invalid, 0 Unknown, 0 Unchecked, 1303.02ms Time] [2021-11-12 22:44:20,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60014 states. [2021-11-12 22:44:28,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60014 to 15128. [2021-11-12 22:44:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15128 states, 15127 states have (on average 1.3207509750776756) internal successors, (19979), 15127 states have internal predecessors, (19979), 0 states have call successors, (0), 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 22:44:28,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15128 states to 15128 states and 19979 transitions. [2021-11-12 22:44:28,861 INFO L78 Accepts]: Start accepts. Automaton has 15128 states and 19979 transitions. Word has length 74 [2021-11-12 22:44:28,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:44:28,861 INFO L470 AbstractCegarLoop]: Abstraction has 15128 states and 19979 transitions. [2021-11-12 22:44:28,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 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 22:44:28,861 INFO L276 IsEmpty]: Start isEmpty. Operand 15128 states and 19979 transitions. [2021-11-12 22:44:28,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-12 22:44:28,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:44:28,864 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] [2021-11-12 22:44:28,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-12 22:44:28,864 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:44:28,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:44:28,864 INFO L85 PathProgramCache]: Analyzing trace with hash -288744500, now seen corresponding path program 1 times [2021-11-12 22:44:28,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:44:28,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700746971] [2021-11-12 22:44:28,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:44:28,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:44:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:44:28,910 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 22:44:28,911 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:44:28,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700746971] [2021-11-12 22:44:28,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700746971] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:44:28,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:44:28,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:44:28,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279015768] [2021-11-12 22:44:28,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:44:28,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:44:28,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:44:28,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:44:28,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:44:28,913 INFO L87 Difference]: Start difference. First operand 15128 states and 19979 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 22:44:39,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:44:39,465 INFO L93 Difference]: Finished difference Result 32106 states and 42820 transitions. [2021-11-12 22:44:39,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:44:39,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-11-12 22:44:39,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:44:39,490 INFO L225 Difference]: With dead ends: 32106 [2021-11-12 22:44:39,490 INFO L226 Difference]: Without dead ends: 22511 [2021-11-12 22:44:39,500 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 22:44:39,501 INFO L933 BasicCegarLoop]: 411 mSDtfsCounter, 127 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.50ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.84ms IncrementalHoareTripleChecker+Time [2021-11-12 22:44:39,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 704 Invalid, 31 Unknown, 0 Unchecked, 1.50ms Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 30.84ms Time] [2021-11-12 22:44:39,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22511 states. [2021-11-12 22:44:49,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22511 to 20809. [2021-11-12 22:44:49,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20809 states, 20808 states have (on average 1.3160322952710497) internal successors, (27384), 20808 states have internal predecessors, (27384), 0 states have call successors, (0), 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 22:44:49,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20809 states to 20809 states and 27384 transitions. [2021-11-12 22:44:49,675 INFO L78 Accepts]: Start accepts. Automaton has 20809 states and 27384 transitions. Word has length 74 [2021-11-12 22:44:49,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:44:49,676 INFO L470 AbstractCegarLoop]: Abstraction has 20809 states and 27384 transitions. [2021-11-12 22:44:49,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 22:44:49,676 INFO L276 IsEmpty]: Start isEmpty. Operand 20809 states and 27384 transitions. [2021-11-12 22:44:49,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 22:44:49,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:44:49,678 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] [2021-11-12 22:44:49,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-12 22:44:49,679 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:44:49,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:44:49,679 INFO L85 PathProgramCache]: Analyzing trace with hash -252378975, now seen corresponding path program 1 times [2021-11-12 22:44:49,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:44:49,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540537484] [2021-11-12 22:44:49,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:44:49,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:44:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:44:49,775 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 22:44:49,775 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:44:49,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540537484] [2021-11-12 22:44:49,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540537484] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:44:49,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:44:49,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-12 22:44:49,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87309705] [2021-11-12 22:44:49,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:44:49,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:44:49,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:44:49,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:44:49,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:44:49,778 INFO L87 Difference]: Start difference. First operand 20809 states and 27384 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 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 22:45:15,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:45:15,450 INFO L93 Difference]: Finished difference Result 56475 states and 74067 transitions. [2021-11-12 22:45:15,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 22:45:15,450 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-12 22:45:15,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:45:15,509 INFO L225 Difference]: With dead ends: 56475 [2021-11-12 22:45:15,509 INFO L226 Difference]: Without dead ends: 48240 [2021-11-12 22:45:15,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:45:15,521 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 1101 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 437.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1101 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.52ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 543.96ms IncrementalHoareTripleChecker+Time [2021-11-12 22:45:15,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1101 Valid, 1136 Invalid, 1037 Unknown, 0 Unchecked, 6.52ms Time], IncrementalHoareTripleChecker [41 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 543.96ms Time] [2021-11-12 22:45:15,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48240 states. [2021-11-12 22:45:26,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48240 to 20770. [2021-11-12 22:45:26,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20770 states, 20769 states have (on average 1.316336848187202) internal successors, (27339), 20769 states have internal predecessors, (27339), 0 states have call successors, (0), 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 22:45:26,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20770 states to 20770 states and 27339 transitions. [2021-11-12 22:45:26,394 INFO L78 Accepts]: Start accepts. Automaton has 20770 states and 27339 transitions. Word has length 75 [2021-11-12 22:45:26,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:45:26,394 INFO L470 AbstractCegarLoop]: Abstraction has 20770 states and 27339 transitions. [2021-11-12 22:45:26,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 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 22:45:26,394 INFO L276 IsEmpty]: Start isEmpty. Operand 20770 states and 27339 transitions. [2021-11-12 22:45:26,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 22:45:26,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:45:26,398 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] [2021-11-12 22:45:26,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-12 22:45:26,398 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:45:26,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:45:26,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1502549258, now seen corresponding path program 1 times [2021-11-12 22:45:26,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:45:26,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233335502] [2021-11-12 22:45:26,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:45:26,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:45:26,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:45:26,443 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 22:45:26,444 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:45:26,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233335502] [2021-11-12 22:45:26,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233335502] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:45:26,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:45:26,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:45:26,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575842227] [2021-11-12 22:45:26,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:45:26,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:45:26,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:45:26,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:45:26,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:45:26,446 INFO L87 Difference]: Start difference. First operand 20770 states and 27339 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 22:45:35,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:45:35,337 INFO L93 Difference]: Finished difference Result 24696 states and 32465 transitions. [2021-11-12 22:45:35,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:45:35,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-12 22:45:35,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:45:35,358 INFO L225 Difference]: With dead ends: 24696 [2021-11-12 22:45:35,358 INFO L226 Difference]: Without dead ends: 18187 [2021-11-12 22:45:35,364 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 22:45:35,365 INFO L933 BasicCegarLoop]: 468 mSDtfsCounter, 217 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.47ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.66ms IncrementalHoareTripleChecker+Time [2021-11-12 22:45:35,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 719 Invalid, 28 Unknown, 0 Unchecked, 1.47ms Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 31.66ms Time] [2021-11-12 22:45:35,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18187 states.