./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_138f439f-d204-4a43-a5b6-30a396fa1ca7/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_138f439f-d204-4a43-a5b6-30a396fa1ca7/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_138f439f-d204-4a43-a5b6-30a396fa1ca7/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_138f439f-d204-4a43-a5b6-30a396fa1ca7/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_138f439f-d204-4a43-a5b6-30a396fa1ca7/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_138f439f-d204-4a43-a5b6-30a396fa1ca7/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6fcbb6774587cda7a5d573623a9a47b3e351563c8bea7eebdf86bc25d20b8061 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:41:48,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:41:48,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:41:48,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:41:48,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:41:48,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:41:48,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:41:48,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:41:48,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:41:48,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:41:48,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:41:48,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:41:48,986 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:41:48,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:41:48,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:41:48,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:41:48,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:41:48,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:41:48,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:41:49,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:41:49,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:41:49,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:41:49,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:41:49,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:41:49,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:41:49,014 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:41:49,014 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:41:49,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:41:49,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:41:49,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:41:49,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:41:49,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:41:49,022 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:41:49,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:41:49,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:41:49,028 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:41:49,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:41:49,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:41:49,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:41:49,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:41:49,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:41:49,034 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_138f439f-d204-4a43-a5b6-30a396fa1ca7/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 03:41:49,085 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:41:49,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:41:49,092 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:41:49,093 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:41:49,093 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:41:49,093 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:41:49,094 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 03:41:49,094 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:41:49,094 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:41:49,094 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 03:41:49,096 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 03:41:49,096 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:41:49,096 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 03:41:49,097 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 03:41:49,097 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 03:41:49,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:41:49,099 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:41:49,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:41:49,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:41:49,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:41:49,100 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 03:41:49,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:41:49,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 03:41:49,101 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:41:49,101 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:41:49,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 03:41:49,102 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:41:49,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 03:41:49,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:41:49,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:41:49,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:41:49,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:41:49,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:41:49,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 03:41:49,106 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 03:41:49,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 03:41:49,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 03:41:49,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:41:49,107 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:41:49,107 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_138f439f-d204-4a43-a5b6-30a396fa1ca7/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_138f439f-d204-4a43-a5b6-30a396fa1ca7/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6fcbb6774587cda7a5d573623a9a47b3e351563c8bea7eebdf86bc25d20b8061 [2021-11-03 03:41:49,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:41:49,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:41:49,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:41:49,466 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:41:49,467 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:41:49,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_138f439f-d204-4a43-a5b6-30a396fa1ca7/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-03 03:41:49,547 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_138f439f-d204-4a43-a5b6-30a396fa1ca7/bin/utaipan-aC7eJsxGYH/data/155692294/ae9fd2d33ec24a49aba1b0aa1a41c963/FLAGc9b777bad [2021-11-03 03:41:50,277 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:41:50,278 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_138f439f-d204-4a43-a5b6-30a396fa1ca7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-03 03:41:50,297 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_138f439f-d204-4a43-a5b6-30a396fa1ca7/bin/utaipan-aC7eJsxGYH/data/155692294/ae9fd2d33ec24a49aba1b0aa1a41c963/FLAGc9b777bad [2021-11-03 03:41:50,475 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_138f439f-d204-4a43-a5b6-30a396fa1ca7/bin/utaipan-aC7eJsxGYH/data/155692294/ae9fd2d33ec24a49aba1b0aa1a41c963 [2021-11-03 03:41:50,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:41:50,479 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:41:50,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:41:50,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:41:50,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:41:50,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:41:50" (1/1) ... [2021-11-03 03:41:50,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15290e5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:50, skipping insertion in model container [2021-11-03 03:41:50,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:41:50" (1/1) ... [2021-11-03 03:41:50,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:41:50,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:41:50,846 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_138f439f-d204-4a43-a5b6-30a396fa1ca7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[8891,8904] [2021-11-03 03:41:50,871 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_138f439f-d204-4a43-a5b6-30a396fa1ca7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[12143,12156] [2021-11-03 03:41:50,881 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_138f439f-d204-4a43-a5b6-30a396fa1ca7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[13299,13312] [2021-11-03 03:41:50,887 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_138f439f-d204-4a43-a5b6-30a396fa1ca7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[13955,13968] [2021-11-03 03:41:50,898 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_138f439f-d204-4a43-a5b6-30a396fa1ca7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[15434,15447] [2021-11-03 03:41:50,904 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_138f439f-d204-4a43-a5b6-30a396fa1ca7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[16090,16103] [2021-11-03 03:41:50,912 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_138f439f-d204-4a43-a5b6-30a396fa1ca7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[17074,17087] [2021-11-03 03:41:50,929 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_138f439f-d204-4a43-a5b6-30a396fa1ca7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[19370,19383] [2021-11-03 03:41:50,935 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_138f439f-d204-4a43-a5b6-30a396fa1ca7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[20029,20042] [2021-11-03 03:41:50,943 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_138f439f-d204-4a43-a5b6-30a396fa1ca7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[21011,21024] [2021-11-03 03:41:50,957 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_138f439f-d204-4a43-a5b6-30a396fa1ca7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[22802,22815] [2021-11-03 03:41:51,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:41:51,131 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:41:51,200 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_138f439f-d204-4a43-a5b6-30a396fa1ca7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[8891,8904] [2021-11-03 03:41:51,235 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_138f439f-d204-4a43-a5b6-30a396fa1ca7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[12143,12156] [2021-11-03 03:41:51,253 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_138f439f-d204-4a43-a5b6-30a396fa1ca7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[13299,13312] [2021-11-03 03:41:51,265 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_138f439f-d204-4a43-a5b6-30a396fa1ca7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[13955,13968] [2021-11-03 03:41:51,290 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_138f439f-d204-4a43-a5b6-30a396fa1ca7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[15434,15447] [2021-11-03 03:41:51,303 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_138f439f-d204-4a43-a5b6-30a396fa1ca7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[16090,16103] [2021-11-03 03:41:51,314 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_138f439f-d204-4a43-a5b6-30a396fa1ca7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[17074,17087] [2021-11-03 03:41:51,341 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_138f439f-d204-4a43-a5b6-30a396fa1ca7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[19370,19383] [2021-11-03 03:41:51,349 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_138f439f-d204-4a43-a5b6-30a396fa1ca7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[20029,20042] [2021-11-03 03:41:51,359 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_138f439f-d204-4a43-a5b6-30a396fa1ca7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[21011,21024] [2021-11-03 03:41:51,381 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_138f439f-d204-4a43-a5b6-30a396fa1ca7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[22802,22815] [2021-11-03 03:41:51,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:41:51,507 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:41:51,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:51 WrapperNode [2021-11-03 03:41:51,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:41:51,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:41:51,509 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:41:51,509 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:41:51,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:51" (1/1) ... [2021-11-03 03:41:51,556 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:51" (1/1) ... [2021-11-03 03:41:51,628 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:41:51,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:41:51,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:41:51,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:41:51,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:51" (1/1) ... [2021-11-03 03:41:51,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:51" (1/1) ... [2021-11-03 03:41:51,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:51" (1/1) ... [2021-11-03 03:41:51,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:51" (1/1) ... [2021-11-03 03:41:51,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:51" (1/1) ... [2021-11-03 03:41:51,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:51" (1/1) ... [2021-11-03 03:41:51,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:51" (1/1) ... [2021-11-03 03:41:51,739 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:41:51,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:41:51,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:41:51,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:41:51,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:51" (1/1) ... [2021-11-03 03:41:51,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:41:51,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_138f439f-d204-4a43-a5b6-30a396fa1ca7/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:41:51,795 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_138f439f-d204-4a43-a5b6-30a396fa1ca7/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:41:51,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_138f439f-d204-4a43-a5b6-30a396fa1ca7/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:41:51,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 03:41:51,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:41:51,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:41:51,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:41:53,534 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:41:53,534 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-03 03:41:53,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:41:53 BoogieIcfgContainer [2021-11-03 03:41:53,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:41:53,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:41:53,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:41:53,543 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:41:53,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:41:50" (1/3) ... [2021-11-03 03:41:53,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28227bf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:41:53, skipping insertion in model container [2021-11-03 03:41:53,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:51" (2/3) ... [2021-11-03 03:41:53,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28227bf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:41:53, skipping insertion in model container [2021-11-03 03:41:53,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:41:53" (3/3) ... [2021-11-03 03:41:53,546 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-03 03:41:53,552 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:41:53,552 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-11-03 03:41:53,603 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:41:53,609 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 03:41:53,609 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-11-03 03:41:53,633 INFO L276 IsEmpty]: Start isEmpty. Operand has 336 states, 324 states have (on average 1.845679012345679) internal successors, (598), 335 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:53,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 03:41:53,645 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:53,646 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:41:53,647 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:41:53,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:53,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1432511949, now seen corresponding path program 1 times [2021-11-03 03:41:53,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:41:53,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589620332] [2021-11-03 03:41:53,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:53,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:41:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:54,120 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:41:54,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589620332] [2021-11-03 03:41:54,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589620332] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:54,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:54,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:41:54,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125139943] [2021-11-03 03:41:54,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:41:54,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:41:54,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:41:54,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:41:54,167 INFO L87 Difference]: Start difference. First operand has 336 states, 324 states have (on average 1.845679012345679) internal successors, (598), 335 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:54,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:54,483 INFO L93 Difference]: Finished difference Result 526 states and 899 transitions. [2021-11-03 03:41:54,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:41:54,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-11-03 03:41:54,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:54,498 INFO L225 Difference]: With dead ends: 526 [2021-11-03 03:41:54,498 INFO L226 Difference]: Without dead ends: 282 [2021-11-03 03:41:54,502 INFO L786 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 [2021-11-03 03:41:54,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-03 03:41:54,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2021-11-03 03:41:54,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 271 states have (on average 1.2583025830258303) internal successors, (341), 281 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:54,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 341 transitions. [2021-11-03 03:41:54,557 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 341 transitions. Word has length 57 [2021-11-03 03:41:54,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:54,558 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 341 transitions. [2021-11-03 03:41:54,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:54,558 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 341 transitions. [2021-11-03 03:41:54,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 03:41:54,562 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:54,562 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:41:54,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 03:41:54,563 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:41:54,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:54,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1451472122, now seen corresponding path program 1 times [2021-11-03 03:41:54,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:41:54,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250174570] [2021-11-03 03:41:54,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:54,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:41:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:54,713 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:41:54,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250174570] [2021-11-03 03:41:54,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250174570] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:54,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:54,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:41:54,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243084604] [2021-11-03 03:41:54,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:41:54,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:41:54,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:41:54,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:41:54,722 INFO L87 Difference]: Start difference. First operand 282 states and 341 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:54,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:54,977 INFO L93 Difference]: Finished difference Result 466 states and 577 transitions. [2021-11-03 03:41:54,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:41:54,977 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-03 03:41:54,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:54,980 INFO L225 Difference]: With dead ends: 466 [2021-11-03 03:41:54,980 INFO L226 Difference]: Without dead ends: 247 [2021-11-03 03:41:54,982 INFO L786 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 [2021-11-03 03:41:54,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-03 03:41:55,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2021-11-03 03:41:55,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 236 states have (on average 1.2754237288135593) internal successors, (301), 246 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:55,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 301 transitions. [2021-11-03 03:41:55,005 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 301 transitions. Word has length 58 [2021-11-03 03:41:55,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:55,005 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 301 transitions. [2021-11-03 03:41:55,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:55,006 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 301 transitions. [2021-11-03 03:41:55,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 03:41:55,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:55,008 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:41:55,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 03:41:55,009 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:41:55,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:55,010 INFO L85 PathProgramCache]: Analyzing trace with hash 659385937, now seen corresponding path program 1 times [2021-11-03 03:41:55,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:41:55,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929292738] [2021-11-03 03:41:55,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:55,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:41:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:55,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:55,118 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:41:55,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929292738] [2021-11-03 03:41:55,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929292738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:55,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:55,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:41:55,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611003028] [2021-11-03 03:41:55,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:41:55,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:41:55,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:41:55,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:41:55,121 INFO L87 Difference]: Start difference. First operand 247 states and 301 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:55,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:55,337 INFO L93 Difference]: Finished difference Result 431 states and 536 transitions. [2021-11-03 03:41:55,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:41:55,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 03:41:55,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:55,340 INFO L225 Difference]: With dead ends: 431 [2021-11-03 03:41:55,340 INFO L226 Difference]: Without dead ends: 237 [2021-11-03 03:41:55,341 INFO L786 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 [2021-11-03 03:41:55,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-11-03 03:41:55,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2021-11-03 03:41:55,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 226 states have (on average 1.2743362831858407) internal successors, (288), 236 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:55,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 288 transitions. [2021-11-03 03:41:55,360 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 288 transitions. Word has length 59 [2021-11-03 03:41:55,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:55,361 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 288 transitions. [2021-11-03 03:41:55,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:55,362 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 288 transitions. [2021-11-03 03:41:55,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 03:41:55,363 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:55,363 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:41:55,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 03:41:55,364 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:41:55,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:55,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1543164138, now seen corresponding path program 1 times [2021-11-03 03:41:55,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:41:55,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533986021] [2021-11-03 03:41:55,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:55,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:41:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:55,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:55,455 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:41:55,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533986021] [2021-11-03 03:41:55,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533986021] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:55,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:55,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:41:55,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477954114] [2021-11-03 03:41:55,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:41:55,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:41:55,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:41:55,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:41:55,458 INFO L87 Difference]: Start difference. First operand 237 states and 288 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:55,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:55,645 INFO L93 Difference]: Finished difference Result 421 states and 522 transitions. [2021-11-03 03:41:55,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:41:55,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 03:41:55,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:55,647 INFO L225 Difference]: With dead ends: 421 [2021-11-03 03:41:55,647 INFO L226 Difference]: Without dead ends: 226 [2021-11-03 03:41:55,648 INFO L786 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 [2021-11-03 03:41:55,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-03 03:41:55,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2021-11-03 03:41:55,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 215 states have (on average 1.2790697674418605) internal successors, (275), 225 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 275 transitions. [2021-11-03 03:41:55,665 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 275 transitions. Word has length 60 [2021-11-03 03:41:55,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:55,666 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 275 transitions. [2021-11-03 03:41:55,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:55,666 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 275 transitions. [2021-11-03 03:41:55,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 03:41:55,668 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:55,669 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:41:55,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 03:41:55,669 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:41:55,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:55,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1012719179, now seen corresponding path program 1 times [2021-11-03 03:41:55,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:41:55,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489175220] [2021-11-03 03:41:55,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:55,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:41:55,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:55,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:55,866 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:41:55,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489175220] [2021-11-03 03:41:55,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489175220] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:55,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:55,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 03:41:55,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085431119] [2021-11-03 03:41:55,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 03:41:55,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:41:55,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 03:41:55,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:41:55,869 INFO L87 Difference]: Start difference. First operand 226 states and 275 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 7 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) [2021-11-03 03:41:56,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:56,514 INFO L93 Difference]: Finished difference Result 484 states and 601 transitions. [2021-11-03 03:41:56,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-03 03:41:56,515 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 7 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 [2021-11-03 03:41:56,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:56,518 INFO L225 Difference]: With dead ends: 484 [2021-11-03 03:41:56,518 INFO L226 Difference]: Without dead ends: 415 [2021-11-03 03:41:56,519 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-03 03:41:56,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-11-03 03:41:56,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 226. [2021-11-03 03:41:56,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 215 states have (on average 1.2744186046511627) internal successors, (274), 225 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:56,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 274 transitions. [2021-11-03 03:41:56,540 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 274 transitions. Word has length 61 [2021-11-03 03:41:56,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:56,541 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 274 transitions. [2021-11-03 03:41:56,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 7 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) [2021-11-03 03:41:56,541 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 274 transitions. [2021-11-03 03:41:56,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 03:41:56,542 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:56,543 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:41:56,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 03:41:56,543 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:41:56,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:56,544 INFO L85 PathProgramCache]: Analyzing trace with hash 603873951, now seen corresponding path program 1 times [2021-11-03 03:41:56,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:41:56,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491583286] [2021-11-03 03:41:56,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:56,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:41:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:56,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:56,663 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:41:56,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491583286] [2021-11-03 03:41:56,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491583286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:56,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:56,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 03:41:56,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449523393] [2021-11-03 03:41:56,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 03:41:56,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:41:56,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 03:41:56,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:41:56,666 INFO L87 Difference]: Start difference. First operand 226 states and 274 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 7 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) [2021-11-03 03:41:57,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:57,360 INFO L93 Difference]: Finished difference Result 458 states and 567 transitions. [2021-11-03 03:41:57,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-03 03:41:57,360 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 7 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 [2021-11-03 03:41:57,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:57,363 INFO L225 Difference]: With dead ends: 458 [2021-11-03 03:41:57,363 INFO L226 Difference]: Without dead ends: 411 [2021-11-03 03:41:57,364 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-03 03:41:57,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-11-03 03:41:57,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 226. [2021-11-03 03:41:57,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 215 states have (on average 1.2697674418604652) internal successors, (273), 225 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:57,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 273 transitions. [2021-11-03 03:41:57,387 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 273 transitions. Word has length 61 [2021-11-03 03:41:57,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:57,387 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 273 transitions. [2021-11-03 03:41:57,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 7 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) [2021-11-03 03:41:57,388 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 273 transitions. [2021-11-03 03:41:57,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 03:41:57,389 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:57,389 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:41:57,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 03:41:57,390 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:41:57,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:57,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1551029823, now seen corresponding path program 1 times [2021-11-03 03:41:57,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:41:57,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832326251] [2021-11-03 03:41:57,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:57,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:41:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:57,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:57,535 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:41:57,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832326251] [2021-11-03 03:41:57,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832326251] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:57,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:57,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-03 03:41:57,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813496147] [2021-11-03 03:41:57,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 03:41:57,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:41:57,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 03:41:57,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:41:57,538 INFO L87 Difference]: Start difference. First operand 226 states and 273 transitions. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 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) [2021-11-03 03:41:58,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:58,278 INFO L93 Difference]: Finished difference Result 486 states and 600 transitions. [2021-11-03 03:41:58,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 03:41:58,279 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 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 [2021-11-03 03:41:58,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:58,281 INFO L225 Difference]: With dead ends: 486 [2021-11-03 03:41:58,282 INFO L226 Difference]: Without dead ends: 411 [2021-11-03 03:41:58,283 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-11-03 03:41:58,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-11-03 03:41:58,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 226. [2021-11-03 03:41:58,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 215 states have (on average 1.2651162790697674) internal successors, (272), 225 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:58,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 272 transitions. [2021-11-03 03:41:58,308 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 272 transitions. Word has length 61 [2021-11-03 03:41:58,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:58,308 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 272 transitions. [2021-11-03 03:41:58,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 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) [2021-11-03 03:41:58,309 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 272 transitions. [2021-11-03 03:41:58,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 03:41:58,310 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:58,310 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:41:58,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 03:41:58,310 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:41:58,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:58,311 INFO L85 PathProgramCache]: Analyzing trace with hash -427677757, now seen corresponding path program 1 times [2021-11-03 03:41:58,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:41:58,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895816437] [2021-11-03 03:41:58,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:58,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:41:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:58,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:58,409 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:41:58,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895816437] [2021-11-03 03:41:58,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895816437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:58,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:58,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 03:41:58,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216568691] [2021-11-03 03:41:58,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 03:41:58,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:41:58,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 03:41:58,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-03 03:41:58,412 INFO L87 Difference]: Start difference. First operand 226 states and 272 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 6 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) [2021-11-03 03:41:58,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:58,848 INFO L93 Difference]: Finished difference Result 427 states and 505 transitions. [2021-11-03 03:41:58,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 03:41:58,849 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 6 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 [2021-11-03 03:41:58,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:58,851 INFO L225 Difference]: With dead ends: 427 [2021-11-03 03:41:58,851 INFO L226 Difference]: Without dead ends: 313 [2021-11-03 03:41:58,852 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-03 03:41:58,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-03 03:41:58,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 226. [2021-11-03 03:41:58,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 215 states have (on average 1.2604651162790699) internal successors, (271), 225 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:58,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 271 transitions. [2021-11-03 03:41:58,895 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 271 transitions. Word has length 61 [2021-11-03 03:41:58,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:58,895 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 271 transitions. [2021-11-03 03:41:58,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 6 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) [2021-11-03 03:41:58,897 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 271 transitions. [2021-11-03 03:41:58,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-03 03:41:58,903 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:58,903 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:41:58,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 03:41:58,907 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:41:58,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:58,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1026541166, now seen corresponding path program 1 times [2021-11-03 03:41:58,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:41:58,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94441587] [2021-11-03 03:41:58,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:58,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:41:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:59,102 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:41:59,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94441587] [2021-11-03 03:41:59,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94441587] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:59,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:59,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 03:41:59,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450467389] [2021-11-03 03:41:59,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 03:41:59,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:41:59,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 03:41:59,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:41:59,105 INFO L87 Difference]: Start difference. First operand 226 states and 271 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 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) [2021-11-03 03:41:59,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:59,839 INFO L93 Difference]: Finished difference Result 443 states and 539 transitions. [2021-11-03 03:41:59,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-03 03:41:59,839 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 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 [2021-11-03 03:41:59,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:59,842 INFO L225 Difference]: With dead ends: 443 [2021-11-03 03:41:59,842 INFO L226 Difference]: Without dead ends: 403 [2021-11-03 03:41:59,843 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-03 03:41:59,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-11-03 03:41:59,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 226. [2021-11-03 03:41:59,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 215 states have (on average 1.255813953488372) internal successors, (270), 225 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:59,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 270 transitions. [2021-11-03 03:41:59,885 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 270 transitions. Word has length 63 [2021-11-03 03:41:59,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:59,885 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 270 transitions. [2021-11-03 03:41:59,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 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) [2021-11-03 03:41:59,885 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 270 transitions. [2021-11-03 03:41:59,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-03 03:41:59,890 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:59,890 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:41:59,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 03:41:59,891 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:41:59,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:59,891 INFO L85 PathProgramCache]: Analyzing trace with hash 885655936, now seen corresponding path program 1 times [2021-11-03 03:41:59,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:41:59,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029673018] [2021-11-03 03:41:59,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:59,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:41:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:00,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:00,047 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:00,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029673018] [2021-11-03 03:42:00,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029673018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:00,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:00,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 03:42:00,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222062713] [2021-11-03 03:42:00,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 03:42:00,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:00,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 03:42:00,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:42:00,050 INFO L87 Difference]: Start difference. First operand 226 states and 270 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 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) [2021-11-03 03:42:00,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:00,815 INFO L93 Difference]: Finished difference Result 463 states and 567 transitions. [2021-11-03 03:42:00,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-03 03:42:00,816 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 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 [2021-11-03 03:42:00,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:00,818 INFO L225 Difference]: With dead ends: 463 [2021-11-03 03:42:00,818 INFO L226 Difference]: Without dead ends: 411 [2021-11-03 03:42:00,819 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-03 03:42:00,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-11-03 03:42:00,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 226. [2021-11-03 03:42:00,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 215 states have (on average 1.2511627906976743) internal successors, (269), 225 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:00,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 269 transitions. [2021-11-03 03:42:00,846 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 269 transitions. Word has length 63 [2021-11-03 03:42:00,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:00,867 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 269 transitions. [2021-11-03 03:42:00,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 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) [2021-11-03 03:42:00,867 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 269 transitions. [2021-11-03 03:42:00,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-03 03:42:00,868 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:00,868 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:00,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 03:42:00,869 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:00,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:00,870 INFO L85 PathProgramCache]: Analyzing trace with hash -515644867, now seen corresponding path program 1 times [2021-11-03 03:42:00,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:00,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815811024] [2021-11-03 03:42:00,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:00,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:00,982 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:00,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815811024] [2021-11-03 03:42:00,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815811024] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:00,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:00,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 03:42:00,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004315570] [2021-11-03 03:42:00,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 03:42:00,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:00,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 03:42:00,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:42:00,985 INFO L87 Difference]: Start difference. First operand 226 states and 269 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 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) [2021-11-03 03:42:01,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:01,753 INFO L93 Difference]: Finished difference Result 440 states and 534 transitions. [2021-11-03 03:42:01,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-03 03:42:01,754 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 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 [2021-11-03 03:42:01,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:01,757 INFO L225 Difference]: With dead ends: 440 [2021-11-03 03:42:01,757 INFO L226 Difference]: Without dead ends: 403 [2021-11-03 03:42:01,758 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-03 03:42:01,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-11-03 03:42:01,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 226. [2021-11-03 03:42:01,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 215 states have (on average 1.2465116279069768) internal successors, (268), 225 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:01,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 268 transitions. [2021-11-03 03:42:01,784 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 268 transitions. Word has length 63 [2021-11-03 03:42:01,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:01,784 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 268 transitions. [2021-11-03 03:42:01,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 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) [2021-11-03 03:42:01,785 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 268 transitions. [2021-11-03 03:42:01,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-03 03:42:01,786 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:01,786 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:01,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-03 03:42:01,787 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:01,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:01,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1781677741, now seen corresponding path program 1 times [2021-11-03 03:42:01,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:01,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425571231] [2021-11-03 03:42:01,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:01,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:01,974 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:01,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425571231] [2021-11-03 03:42:01,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425571231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:01,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:01,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 03:42:01,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444556076] [2021-11-03 03:42:01,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 03:42:01,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:01,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 03:42:01,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:42:01,977 INFO L87 Difference]: Start difference. First operand 226 states and 268 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 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) [2021-11-03 03:42:02,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:02,756 INFO L93 Difference]: Finished difference Result 408 states and 489 transitions. [2021-11-03 03:42:02,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-03 03:42:02,757 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 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 [2021-11-03 03:42:02,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:02,759 INFO L225 Difference]: With dead ends: 408 [2021-11-03 03:42:02,759 INFO L226 Difference]: Without dead ends: 403 [2021-11-03 03:42:02,760 INFO L786 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 [2021-11-03 03:42:02,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-11-03 03:42:02,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 226. [2021-11-03 03:42:02,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 215 states have (on average 1.241860465116279) internal successors, (267), 225 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:02,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 267 transitions. [2021-11-03 03:42:02,786 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 267 transitions. Word has length 63 [2021-11-03 03:42:02,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:02,786 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 267 transitions. [2021-11-03 03:42:02,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 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) [2021-11-03 03:42:02,787 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 267 transitions. [2021-11-03 03:42:02,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-03 03:42:02,788 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:02,788 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:02,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-03 03:42:02,788 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:02,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:02,789 INFO L85 PathProgramCache]: Analyzing trace with hash 100501655, now seen corresponding path program 1 times [2021-11-03 03:42:02,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:02,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249130707] [2021-11-03 03:42:02,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:02,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:02,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:02,881 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:02,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249130707] [2021-11-03 03:42:02,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249130707] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:02,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:02,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 03:42:02,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996005997] [2021-11-03 03:42:02,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 03:42:02,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:02,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 03:42:02,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:42:02,884 INFO L87 Difference]: Start difference. First operand 226 states and 267 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 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) [2021-11-03 03:42:03,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:03,532 INFO L93 Difference]: Finished difference Result 408 states and 487 transitions. [2021-11-03 03:42:03,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-03 03:42:03,533 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 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 [2021-11-03 03:42:03,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:03,535 INFO L225 Difference]: With dead ends: 408 [2021-11-03 03:42:03,536 INFO L226 Difference]: Without dead ends: 403 [2021-11-03 03:42:03,536 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-03 03:42:03,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-11-03 03:42:03,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 226. [2021-11-03 03:42:03,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 215 states have (on average 1.2372093023255815) internal successors, (266), 225 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:03,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 266 transitions. [2021-11-03 03:42:03,563 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 266 transitions. Word has length 63 [2021-11-03 03:42:03,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:03,563 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 266 transitions. [2021-11-03 03:42:03,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 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) [2021-11-03 03:42:03,564 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 266 transitions. [2021-11-03 03:42:03,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-03 03:42:03,564 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:03,565 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:03,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-03 03:42:03,565 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:03,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:03,566 INFO L85 PathProgramCache]: Analyzing trace with hash 2012698757, now seen corresponding path program 1 times [2021-11-03 03:42:03,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:03,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500487408] [2021-11-03 03:42:03,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:03,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:03,670 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:03,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500487408] [2021-11-03 03:42:03,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500487408] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:03,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:03,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 03:42:03,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236367035] [2021-11-03 03:42:03,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 03:42:03,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:03,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 03:42:03,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:42:03,672 INFO L87 Difference]: Start difference. First operand 226 states and 266 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 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) [2021-11-03 03:42:04,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:04,438 INFO L93 Difference]: Finished difference Result 428 states and 515 transitions. [2021-11-03 03:42:04,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-03 03:42:04,439 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 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 [2021-11-03 03:42:04,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:04,442 INFO L225 Difference]: With dead ends: 428 [2021-11-03 03:42:04,442 INFO L226 Difference]: Without dead ends: 411 [2021-11-03 03:42:04,442 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-03 03:42:04,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-11-03 03:42:04,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 226. [2021-11-03 03:42:04,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 215 states have (on average 1.2325581395348837) internal successors, (265), 225 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:04,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 265 transitions. [2021-11-03 03:42:04,470 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 265 transitions. Word has length 63 [2021-11-03 03:42:04,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:04,470 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 265 transitions. [2021-11-03 03:42:04,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 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) [2021-11-03 03:42:04,471 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 265 transitions. [2021-11-03 03:42:04,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-03 03:42:04,472 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:04,472 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:04,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-03 03:42:04,472 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:04,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:04,473 INFO L85 PathProgramCache]: Analyzing trace with hash -522081681, now seen corresponding path program 1 times [2021-11-03 03:42:04,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:04,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539496104] [2021-11-03 03:42:04,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:04,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:04,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:04,827 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:04,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539496104] [2021-11-03 03:42:04,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539496104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:04,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:04,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-03 03:42:04,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919679930] [2021-11-03 03:42:04,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 03:42:04,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:04,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 03:42:04,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:42:04,834 INFO L87 Difference]: Start difference. First operand 226 states and 265 transitions. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 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) [2021-11-03 03:42:05,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:05,570 INFO L93 Difference]: Finished difference Result 504 states and 594 transitions. [2021-11-03 03:42:05,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 03:42:05,570 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 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 [2021-11-03 03:42:05,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:05,573 INFO L225 Difference]: With dead ends: 504 [2021-11-03 03:42:05,573 INFO L226 Difference]: Without dead ends: 406 [2021-11-03 03:42:05,576 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-11-03 03:42:05,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-11-03 03:42:05,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 163. [2021-11-03 03:42:05,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 156 states have (on average 1.205128205128205) internal successors, (188), 162 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:05,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 188 transitions. [2021-11-03 03:42:05,605 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 188 transitions. Word has length 65 [2021-11-03 03:42:05,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:05,605 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 188 transitions. [2021-11-03 03:42:05,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 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) [2021-11-03 03:42:05,606 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 188 transitions. [2021-11-03 03:42:05,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-03 03:42:05,607 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:05,607 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:05,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-03 03:42:05,607 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:05,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:05,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1614163178, now seen corresponding path program 1 times [2021-11-03 03:42:05,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:05,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966924873] [2021-11-03 03:42:05,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:05,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:06,169 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:06,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966924873] [2021-11-03 03:42:06,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966924873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:06,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:06,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-03 03:42:06,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921402022] [2021-11-03 03:42:06,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-03 03:42:06,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:06,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-03 03:42:06,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-03 03:42:06,171 INFO L87 Difference]: Start difference. First operand 163 states and 188 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 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) [2021-11-03 03:42:07,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:07,450 INFO L93 Difference]: Finished difference Result 386 states and 452 transitions. [2021-11-03 03:42:07,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-03 03:42:07,458 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 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 [2021-11-03 03:42:07,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:07,463 INFO L225 Difference]: With dead ends: 386 [2021-11-03 03:42:07,463 INFO L226 Difference]: Without dead ends: 347 [2021-11-03 03:42:07,465 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2021-11-03 03:42:07,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-11-03 03:42:07,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 179. [2021-11-03 03:42:07,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 172 states have (on average 1.2267441860465116) internal successors, (211), 178 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:07,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 211 transitions. [2021-11-03 03:42:07,511 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 211 transitions. Word has length 65 [2021-11-03 03:42:07,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:07,511 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 211 transitions. [2021-11-03 03:42:07,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 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) [2021-11-03 03:42:07,511 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 211 transitions. [2021-11-03 03:42:07,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-03 03:42:07,512 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:07,512 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:07,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-03 03:42:07,512 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:07,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:07,513 INFO L85 PathProgramCache]: Analyzing trace with hash 234306004, now seen corresponding path program 1 times [2021-11-03 03:42:07,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:07,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655351521] [2021-11-03 03:42:07,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:07,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:08,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:08,179 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:08,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655351521] [2021-11-03 03:42:08,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655351521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:08,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:08,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-03 03:42:08,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565808154] [2021-11-03 03:42:08,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-03 03:42:08,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:08,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-03 03:42:08,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-11-03 03:42:08,181 INFO L87 Difference]: Start difference. First operand 179 states and 211 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 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) [2021-11-03 03:42:10,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:10,563 INFO L93 Difference]: Finished difference Result 522 states and 609 transitions. [2021-11-03 03:42:10,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-03 03:42:10,563 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 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 [2021-11-03 03:42:10,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:10,566 INFO L225 Difference]: With dead ends: 522 [2021-11-03 03:42:10,567 INFO L226 Difference]: Without dead ends: 518 [2021-11-03 03:42:10,568 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=250, Invalid=1390, Unknown=0, NotChecked=0, Total=1640 [2021-11-03 03:42:10,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-11-03 03:42:10,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 188. [2021-11-03 03:42:10,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 181 states have (on average 1.2320441988950277) internal successors, (223), 187 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:10,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 223 transitions. [2021-11-03 03:42:10,608 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 223 transitions. Word has length 65 [2021-11-03 03:42:10,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:10,608 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 223 transitions. [2021-11-03 03:42:10,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 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) [2021-11-03 03:42:10,609 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 223 transitions. [2021-11-03 03:42:10,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-03 03:42:10,610 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:10,610 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:10,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-03 03:42:10,611 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:10,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:10,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1546211144, now seen corresponding path program 1 times [2021-11-03 03:42:10,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:10,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514044262] [2021-11-03 03:42:10,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:10,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:11,260 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:11,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514044262] [2021-11-03 03:42:11,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514044262] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:11,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:11,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-03 03:42:11,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755329125] [2021-11-03 03:42:11,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-03 03:42:11,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:11,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-03 03:42:11,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-11-03 03:42:11,262 INFO L87 Difference]: Start difference. First operand 188 states and 223 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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) [2021-11-03 03:42:13,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:13,214 INFO L93 Difference]: Finished difference Result 536 states and 636 transitions. [2021-11-03 03:42:13,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-03 03:42:13,215 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 [2021-11-03 03:42:13,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:13,217 INFO L225 Difference]: With dead ends: 536 [2021-11-03 03:42:13,217 INFO L226 Difference]: Without dead ends: 494 [2021-11-03 03:42:13,218 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2021-11-03 03:42:13,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-11-03 03:42:13,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 193. [2021-11-03 03:42:13,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 186 states have (on average 1.2311827956989247) internal successors, (229), 192 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:13,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 229 transitions. [2021-11-03 03:42:13,261 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 229 transitions. Word has length 65 [2021-11-03 03:42:13,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:13,262 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 229 transitions. [2021-11-03 03:42:13,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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) [2021-11-03 03:42:13,262 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 229 transitions. [2021-11-03 03:42:13,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 03:42:13,263 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:13,263 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:13,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-03 03:42:13,264 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:13,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:13,265 INFO L85 PathProgramCache]: Analyzing trace with hash 707158779, now seen corresponding path program 1 times [2021-11-03 03:42:13,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:13,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710880654] [2021-11-03 03:42:13,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:13,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:13,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:13,614 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:13,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710880654] [2021-11-03 03:42:13,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710880654] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:13,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:13,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-03 03:42:13,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707173582] [2021-11-03 03:42:13,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-03 03:42:13,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:13,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-03 03:42:13,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-03 03:42:13,616 INFO L87 Difference]: Start difference. First operand 193 states and 229 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 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) [2021-11-03 03:42:14,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:14,511 INFO L93 Difference]: Finished difference Result 472 states and 586 transitions. [2021-11-03 03:42:14,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-03 03:42:14,511 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 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 [2021-11-03 03:42:14,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:14,518 INFO L225 Difference]: With dead ends: 472 [2021-11-03 03:42:14,519 INFO L226 Difference]: Without dead ends: 417 [2021-11-03 03:42:14,519 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-11-03 03:42:14,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-11-03 03:42:14,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 167. [2021-11-03 03:42:14,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.2037037037037037) internal successors, (195), 166 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:14,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 195 transitions. [2021-11-03 03:42:14,576 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 195 transitions. Word has length 66 [2021-11-03 03:42:14,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:14,577 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 195 transitions. [2021-11-03 03:42:14,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 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) [2021-11-03 03:42:14,577 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 195 transitions. [2021-11-03 03:42:14,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 03:42:14,578 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:14,578 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:14,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-03 03:42:14,580 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:14,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:14,580 INFO L85 PathProgramCache]: Analyzing trace with hash -672698395, now seen corresponding path program 1 times [2021-11-03 03:42:14,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:14,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714674847] [2021-11-03 03:42:14,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:14,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:15,487 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:15,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714674847] [2021-11-03 03:42:15,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714674847] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:15,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:15,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-03 03:42:15,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375995726] [2021-11-03 03:42:15,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-03 03:42:15,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:15,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-03 03:42:15,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-11-03 03:42:15,489 INFO L87 Difference]: Start difference. First operand 167 states and 195 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 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) [2021-11-03 03:42:17,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:17,823 INFO L93 Difference]: Finished difference Result 380 states and 448 transitions. [2021-11-03 03:42:17,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-03 03:42:17,824 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 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 [2021-11-03 03:42:17,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:17,826 INFO L225 Difference]: With dead ends: 380 [2021-11-03 03:42:17,827 INFO L226 Difference]: Without dead ends: 316 [2021-11-03 03:42:17,828 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=295, Invalid=1037, Unknown=0, NotChecked=0, Total=1332 [2021-11-03 03:42:17,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-03 03:42:17,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 162. [2021-11-03 03:42:17,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.1847133757961783) internal successors, (186), 161 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:17,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 186 transitions. [2021-11-03 03:42:17,873 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 186 transitions. Word has length 66 [2021-11-03 03:42:17,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:17,873 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 186 transitions. [2021-11-03 03:42:17,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 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) [2021-11-03 03:42:17,874 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 186 transitions. [2021-11-03 03:42:17,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 03:42:17,875 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:17,875 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:17,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-03 03:42:17,875 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:17,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:17,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1670965080, now seen corresponding path program 1 times [2021-11-03 03:42:17,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:17,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858879687] [2021-11-03 03:42:17,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:17,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:17,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:17,997 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:17,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858879687] [2021-11-03 03:42:17,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858879687] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:17,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:17,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 03:42:17,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374065786] [2021-11-03 03:42:17,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 03:42:17,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:18,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 03:42:18,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:42:18,001 INFO L87 Difference]: Start difference. First operand 162 states and 186 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 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) [2021-11-03 03:42:18,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:18,428 INFO L93 Difference]: Finished difference Result 277 states and 329 transitions. [2021-11-03 03:42:18,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 03:42:18,428 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 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 [2021-11-03 03:42:18,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:18,430 INFO L225 Difference]: With dead ends: 277 [2021-11-03 03:42:18,430 INFO L226 Difference]: Without dead ends: 224 [2021-11-03 03:42:18,431 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-11-03 03:42:18,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-03 03:42:18,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 162. [2021-11-03 03:42:18,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.178343949044586) internal successors, (185), 161 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:18,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 185 transitions. [2021-11-03 03:42:18,475 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 185 transitions. Word has length 66 [2021-11-03 03:42:18,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:18,475 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 185 transitions. [2021-11-03 03:42:18,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 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) [2021-11-03 03:42:18,476 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 185 transitions. [2021-11-03 03:42:18,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 03:42:18,476 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:18,477 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:18,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-03 03:42:18,477 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:18,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:18,478 INFO L85 PathProgramCache]: Analyzing trace with hash -610937680, now seen corresponding path program 1 times [2021-11-03 03:42:18,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:18,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92040867] [2021-11-03 03:42:18,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:18,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:18,570 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:18,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92040867] [2021-11-03 03:42:18,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92040867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:18,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:18,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 03:42:18,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146729632] [2021-11-03 03:42:18,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 03:42:18,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:18,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 03:42:18,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:42:18,573 INFO L87 Difference]: Start difference. First operand 162 states and 185 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 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) [2021-11-03 03:42:18,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:18,952 INFO L93 Difference]: Finished difference Result 233 states and 267 transitions. [2021-11-03 03:42:18,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 03:42:18,953 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 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 [2021-11-03 03:42:18,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:18,955 INFO L225 Difference]: With dead ends: 233 [2021-11-03 03:42:18,955 INFO L226 Difference]: Without dead ends: 226 [2021-11-03 03:42:18,955 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-11-03 03:42:18,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-03 03:42:18,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 162. [2021-11-03 03:42:18,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.1656050955414012) internal successors, (183), 161 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:18,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 183 transitions. [2021-11-03 03:42:18,995 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 183 transitions. Word has length 66 [2021-11-03 03:42:18,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:18,995 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 183 transitions. [2021-11-03 03:42:18,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 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) [2021-11-03 03:42:18,995 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 183 transitions. [2021-11-03 03:42:18,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 03:42:18,996 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:18,996 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:18,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-03 03:42:18,997 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:18,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:18,998 INFO L85 PathProgramCache]: Analyzing trace with hash -987331860, now seen corresponding path program 1 times [2021-11-03 03:42:18,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:18,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678549569] [2021-11-03 03:42:18,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:18,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:19,509 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:19,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678549569] [2021-11-03 03:42:19,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678549569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:19,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:19,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-03 03:42:19,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193913369] [2021-11-03 03:42:19,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-03 03:42:19,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:19,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-03 03:42:19,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-03 03:42:19,511 INFO L87 Difference]: Start difference. First operand 162 states and 183 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 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) [2021-11-03 03:42:20,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:20,773 INFO L93 Difference]: Finished difference Result 392 states and 462 transitions. [2021-11-03 03:42:20,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-03 03:42:20,774 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 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 [2021-11-03 03:42:20,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:20,776 INFO L225 Difference]: With dead ends: 392 [2021-11-03 03:42:20,776 INFO L226 Difference]: Without dead ends: 354 [2021-11-03 03:42:20,777 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-11-03 03:42:20,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-11-03 03:42:20,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 142. [2021-11-03 03:42:20,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 138 states have (on average 1.1594202898550725) internal successors, (160), 141 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:20,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 160 transitions. [2021-11-03 03:42:20,825 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 160 transitions. Word has length 66 [2021-11-03 03:42:20,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:20,826 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 160 transitions. [2021-11-03 03:42:20,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 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) [2021-11-03 03:42:20,826 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 160 transitions. [2021-11-03 03:42:20,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 03:42:20,827 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:20,827 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:20,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-03 03:42:20,828 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:20,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:20,828 INFO L85 PathProgramCache]: Analyzing trace with hash 960302843, now seen corresponding path program 1 times [2021-11-03 03:42:20,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:20,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280163492] [2021-11-03 03:42:20,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:20,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:21,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:21,601 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:21,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280163492] [2021-11-03 03:42:21,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280163492] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:21,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:21,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-03 03:42:21,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678722004] [2021-11-03 03:42:21,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-03 03:42:21,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:21,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-03 03:42:21,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-11-03 03:42:21,603 INFO L87 Difference]: Start difference. First operand 142 states and 160 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 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) [2021-11-03 03:42:23,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:23,730 INFO L93 Difference]: Finished difference Result 273 states and 318 transitions. [2021-11-03 03:42:23,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-03 03:42:23,731 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 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 [2021-11-03 03:42:23,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:23,733 INFO L225 Difference]: With dead ends: 273 [2021-11-03 03:42:23,733 INFO L226 Difference]: Without dead ends: 269 [2021-11-03 03:42:23,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=316, Invalid=1406, Unknown=0, NotChecked=0, Total=1722 [2021-11-03 03:42:23,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-03 03:42:23,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 138. [2021-11-03 03:42:23,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 135 states have (on average 1.1555555555555554) internal successors, (156), 137 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:23,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 156 transitions. [2021-11-03 03:42:23,778 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 156 transitions. Word has length 67 [2021-11-03 03:42:23,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:23,778 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 156 transitions. [2021-11-03 03:42:23,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 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) [2021-11-03 03:42:23,779 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 156 transitions. [2021-11-03 03:42:23,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 03:42:23,780 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:23,780 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:23,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-03 03:42:23,780 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:23,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:23,781 INFO L85 PathProgramCache]: Analyzing trace with hash 207320224, now seen corresponding path program 1 times [2021-11-03 03:42:23,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:23,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978386570] [2021-11-03 03:42:23,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:23,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:24,549 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:24,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978386570] [2021-11-03 03:42:24,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978386570] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:24,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:24,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-03 03:42:24,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287018233] [2021-11-03 03:42:24,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-03 03:42:24,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:24,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-03 03:42:24,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-11-03 03:42:24,552 INFO L87 Difference]: Start difference. First operand 138 states and 156 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 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) [2021-11-03 03:42:26,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:26,937 INFO L93 Difference]: Finished difference Result 543 states and 659 transitions. [2021-11-03 03:42:26,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-03 03:42:26,938 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 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 [2021-11-03 03:42:26,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:26,940 INFO L225 Difference]: With dead ends: 543 [2021-11-03 03:42:26,940 INFO L226 Difference]: Without dead ends: 537 [2021-11-03 03:42:26,942 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=240, Invalid=1320, Unknown=0, NotChecked=0, Total=1560 [2021-11-03 03:42:26,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-03 03:42:26,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 149. [2021-11-03 03:42:27,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 146 states have (on average 1.1643835616438356) internal successors, (170), 148 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:27,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 170 transitions. [2021-11-03 03:42:27,001 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 170 transitions. Word has length 68 [2021-11-03 03:42:27,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:27,001 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 170 transitions. [2021-11-03 03:42:27,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 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) [2021-11-03 03:42:27,002 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 170 transitions. [2021-11-03 03:42:27,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 03:42:27,002 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:27,003 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:27,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-03 03:42:27,003 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:27,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:27,004 INFO L85 PathProgramCache]: Analyzing trace with hash -721471249, now seen corresponding path program 1 times [2021-11-03 03:42:27,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:27,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942175198] [2021-11-03 03:42:27,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:27,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:27,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:27,342 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:27,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942175198] [2021-11-03 03:42:27,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942175198] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:27,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:27,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-03 03:42:27,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625237242] [2021-11-03 03:42:27,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-03 03:42:27,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:27,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-03 03:42:27,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-03 03:42:27,344 INFO L87 Difference]: Start difference. First operand 149 states and 170 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 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) [2021-11-03 03:42:28,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:28,326 INFO L93 Difference]: Finished difference Result 441 states and 541 transitions. [2021-11-03 03:42:28,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-03 03:42:28,326 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 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 [2021-11-03 03:42:28,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:28,329 INFO L225 Difference]: With dead ends: 441 [2021-11-03 03:42:28,329 INFO L226 Difference]: Without dead ends: 435 [2021-11-03 03:42:28,330 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-11-03 03:42:28,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-11-03 03:42:28,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 132. [2021-11-03 03:42:28,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 130 states have (on average 1.1538461538461537) internal successors, (150), 131 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:28,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 150 transitions. [2021-11-03 03:42:28,386 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 150 transitions. Word has length 69 [2021-11-03 03:42:28,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:28,386 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 150 transitions. [2021-11-03 03:42:28,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 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) [2021-11-03 03:42:28,387 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 150 transitions. [2021-11-03 03:42:28,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-03 03:42:28,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:28,388 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:28,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-03 03:42:28,388 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:28,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:28,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1431996825, now seen corresponding path program 1 times [2021-11-03 03:42:28,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:28,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109095945] [2021-11-03 03:42:28,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:28,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:29,059 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:29,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109095945] [2021-11-03 03:42:29,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109095945] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:29,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:29,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-03 03:42:29,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396181265] [2021-11-03 03:42:29,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-03 03:42:29,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:29,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-03 03:42:29,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-11-03 03:42:29,061 INFO L87 Difference]: Start difference. First operand 132 states and 150 transitions. Second operand has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 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) [2021-11-03 03:42:30,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:30,805 INFO L93 Difference]: Finished difference Result 386 states and 467 transitions. [2021-11-03 03:42:30,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-03 03:42:30,806 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 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 [2021-11-03 03:42:30,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:30,808 INFO L225 Difference]: With dead ends: 386 [2021-11-03 03:42:30,808 INFO L226 Difference]: Without dead ends: 378 [2021-11-03 03:42:30,809 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=290, Invalid=1042, Unknown=0, NotChecked=0, Total=1332 [2021-11-03 03:42:30,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-03 03:42:30,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 132. [2021-11-03 03:42:30,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 130 states have (on average 1.146153846153846) internal successors, (149), 131 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:30,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 149 transitions. [2021-11-03 03:42:30,857 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 149 transitions. Word has length 70 [2021-11-03 03:42:30,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:30,857 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 149 transitions. [2021-11-03 03:42:30,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 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) [2021-11-03 03:42:30,857 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 149 transitions. [2021-11-03 03:42:30,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 03:42:30,858 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:30,858 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:30,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-03 03:42:30,858 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:30,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:30,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1861119437, now seen corresponding path program 1 times [2021-11-03 03:42:30,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:30,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549689729] [2021-11-03 03:42:30,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:30,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:31,201 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:31,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549689729] [2021-11-03 03:42:31,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549689729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:31,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:31,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-03 03:42:31,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091735823] [2021-11-03 03:42:31,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-03 03:42:31,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:31,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-03 03:42:31,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-03 03:42:31,202 INFO L87 Difference]: Start difference. First operand 132 states and 149 transitions. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 12 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) [2021-11-03 03:42:32,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:32,152 INFO L93 Difference]: Finished difference Result 364 states and 445 transitions. [2021-11-03 03:42:32,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-03 03:42:32,153 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 12 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 [2021-11-03 03:42:32,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:32,155 INFO L225 Difference]: With dead ends: 364 [2021-11-03 03:42:32,155 INFO L226 Difference]: Without dead ends: 346 [2021-11-03 03:42:32,155 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-11-03 03:42:32,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-11-03 03:42:32,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 108. [2021-11-03 03:42:32,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.158878504672897) internal successors, (124), 107 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:32,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2021-11-03 03:42:32,191 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 71 [2021-11-03 03:42:32,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:32,191 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2021-11-03 03:42:32,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 12 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) [2021-11-03 03:42:32,191 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2021-11-03 03:42:32,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 03:42:32,192 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:32,192 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:32,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-03 03:42:32,193 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:32,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:32,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1970953540, now seen corresponding path program 1 times [2021-11-03 03:42:32,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:32,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552723101] [2021-11-03 03:42:32,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:32,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:32,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:32,239 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:32,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552723101] [2021-11-03 03:42:32,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552723101] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:32,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:32,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:42:32,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793059941] [2021-11-03 03:42:32,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:42:32,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:32,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:42:32,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:42:32,242 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:32,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:32,326 INFO L93 Difference]: Finished difference Result 178 states and 216 transitions. [2021-11-03 03:42:32,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:42:32,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-03 03:42:32,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:32,329 INFO L225 Difference]: With dead ends: 178 [2021-11-03 03:42:32,329 INFO L226 Difference]: Without dead ends: 143 [2021-11-03 03:42:32,330 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:42:32,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-03 03:42:32,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2021-11-03 03:42:32,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.1985294117647058) internal successors, (163), 136 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:32,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 163 transitions. [2021-11-03 03:42:32,414 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 163 transitions. Word has length 82 [2021-11-03 03:42:32,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:32,415 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 163 transitions. [2021-11-03 03:42:32,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:32,416 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 163 transitions. [2021-11-03 03:42:32,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 03:42:32,416 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:32,416 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:32,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-03 03:42:32,417 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:32,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:32,417 INFO L85 PathProgramCache]: Analyzing trace with hash -181466713, now seen corresponding path program 1 times [2021-11-03 03:42:32,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:32,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343651567] [2021-11-03 03:42:32,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:32,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:32,472 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:32,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343651567] [2021-11-03 03:42:32,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343651567] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:32,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:32,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:42:32,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315504703] [2021-11-03 03:42:32,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:42:32,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:32,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:42:32,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:42:32,474 INFO L87 Difference]: Start difference. First operand 137 states and 163 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:32,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:32,615 INFO L93 Difference]: Finished difference Result 265 states and 333 transitions. [2021-11-03 03:42:32,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:42:32,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-11-03 03:42:32,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:32,616 INFO L225 Difference]: With dead ends: 265 [2021-11-03 03:42:32,616 INFO L226 Difference]: Without dead ends: 201 [2021-11-03 03:42:32,617 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:42:32,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-03 03:42:32,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 191. [2021-11-03 03:42:32,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.236842105263158) internal successors, (235), 190 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:32,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 235 transitions. [2021-11-03 03:42:32,714 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 235 transitions. Word has length 85 [2021-11-03 03:42:32,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:32,715 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 235 transitions. [2021-11-03 03:42:32,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:32,715 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 235 transitions. [2021-11-03 03:42:32,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-03 03:42:32,715 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:32,716 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:32,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-03 03:42:32,716 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:32,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:32,717 INFO L85 PathProgramCache]: Analyzing trace with hash -142636224, now seen corresponding path program 1 times [2021-11-03 03:42:32,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:32,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394999192] [2021-11-03 03:42:32,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:32,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:32,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:32,762 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:32,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394999192] [2021-11-03 03:42:32,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394999192] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:32,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:32,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:42:32,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685641044] [2021-11-03 03:42:32,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:42:32,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:32,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:42:32,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:42:32,765 INFO L87 Difference]: Start difference. First operand 191 states and 235 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:33,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:33,047 INFO L93 Difference]: Finished difference Result 427 states and 549 transitions. [2021-11-03 03:42:33,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:42:33,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-03 03:42:33,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:33,050 INFO L225 Difference]: With dead ends: 427 [2021-11-03 03:42:33,050 INFO L226 Difference]: Without dead ends: 309 [2021-11-03 03:42:33,051 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:42:33,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-11-03 03:42:33,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 291. [2021-11-03 03:42:33,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.2655172413793103) internal successors, (367), 290 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:33,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 367 transitions. [2021-11-03 03:42:33,271 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 367 transitions. Word has length 88 [2021-11-03 03:42:33,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:33,272 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 367 transitions. [2021-11-03 03:42:33,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:33,272 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 367 transitions. [2021-11-03 03:42:33,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-03 03:42:33,273 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:33,273 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:33,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-03 03:42:33,273 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:33,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:33,274 INFO L85 PathProgramCache]: Analyzing trace with hash 449708366, now seen corresponding path program 1 times [2021-11-03 03:42:33,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:33,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104496593] [2021-11-03 03:42:33,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:33,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:33,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:33,324 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:33,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104496593] [2021-11-03 03:42:33,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104496593] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:33,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:33,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:42:33,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042689881] [2021-11-03 03:42:33,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:42:33,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:33,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:42:33,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:42:33,326 INFO L87 Difference]: Start difference. First operand 291 states and 367 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:33,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:33,816 INFO L93 Difference]: Finished difference Result 727 states and 945 transitions. [2021-11-03 03:42:33,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:42:33,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-11-03 03:42:33,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:33,819 INFO L225 Difference]: With dead ends: 727 [2021-11-03 03:42:33,819 INFO L226 Difference]: Without dead ends: 509 [2021-11-03 03:42:33,822 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:42:33,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-11-03 03:42:34,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 475. [2021-11-03 03:42:34,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 1.280590717299578) internal successors, (607), 474 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:34,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 607 transitions. [2021-11-03 03:42:34,151 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 607 transitions. Word has length 91 [2021-11-03 03:42:34,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:34,152 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 607 transitions. [2021-11-03 03:42:34,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:34,152 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 607 transitions. [2021-11-03 03:42:34,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-03 03:42:34,153 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:34,153 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:34,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-03 03:42:34,154 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:34,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:34,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1410131112, now seen corresponding path program 1 times [2021-11-03 03:42:34,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:34,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725849258] [2021-11-03 03:42:34,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:34,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:34,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:34,238 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:34,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725849258] [2021-11-03 03:42:34,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725849258] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:34,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:34,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 03:42:34,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739167395] [2021-11-03 03:42:34,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:42:34,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:34,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:42:34,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:42:34,241 INFO L87 Difference]: Start difference. First operand 475 states and 607 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:35,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:35,529 INFO L93 Difference]: Finished difference Result 1779 states and 2305 transitions. [2021-11-03 03:42:35,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 03:42:35,530 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-03 03:42:35,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:35,537 INFO L225 Difference]: With dead ends: 1779 [2021-11-03 03:42:35,537 INFO L226 Difference]: Without dead ends: 1377 [2021-11-03 03:42:35,538 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-03 03:42:35,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2021-11-03 03:42:36,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 664. [2021-11-03 03:42:36,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 1.2730015082956259) internal successors, (844), 663 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:36,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 844 transitions. [2021-11-03 03:42:36,084 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 844 transitions. Word has length 94 [2021-11-03 03:42:36,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:36,085 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 844 transitions. [2021-11-03 03:42:36,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:36,085 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 844 transitions. [2021-11-03 03:42:36,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-03 03:42:36,086 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:36,087 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:36,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-03 03:42:36,087 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:36,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:36,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1639937050, now seen corresponding path program 1 times [2021-11-03 03:42:36,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:36,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592015241] [2021-11-03 03:42:36,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:36,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:36,249 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:36,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592015241] [2021-11-03 03:42:36,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592015241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:36,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:36,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 03:42:36,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159980902] [2021-11-03 03:42:36,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:42:36,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:36,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:42:36,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:42:36,251 INFO L87 Difference]: Start difference. First operand 664 states and 844 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:36,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:36,845 INFO L93 Difference]: Finished difference Result 1257 states and 1611 transitions. [2021-11-03 03:42:36,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 03:42:36,846 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-03 03:42:36,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:36,849 INFO L225 Difference]: With dead ends: 1257 [2021-11-03 03:42:36,849 INFO L226 Difference]: Without dead ends: 666 [2021-11-03 03:42:36,850 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:42:36,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-11-03 03:42:37,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 664. [2021-11-03 03:42:37,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 1.2714932126696832) internal successors, (843), 663 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:37,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 843 transitions. [2021-11-03 03:42:37,387 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 843 transitions. Word has length 96 [2021-11-03 03:42:37,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:37,387 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 843 transitions. [2021-11-03 03:42:37,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:37,388 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 843 transitions. [2021-11-03 03:42:37,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-03 03:42:37,388 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:37,388 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:37,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-03 03:42:37,388 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:37,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:37,389 INFO L85 PathProgramCache]: Analyzing trace with hash 2055521500, now seen corresponding path program 1 times [2021-11-03 03:42:37,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:37,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717544939] [2021-11-03 03:42:37,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:37,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:37,437 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:37,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717544939] [2021-11-03 03:42:37,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717544939] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:37,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:37,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:42:37,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483052623] [2021-11-03 03:42:37,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:42:37,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:37,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:42:37,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:42:37,439 INFO L87 Difference]: Start difference. First operand 664 states and 843 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:38,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:38,228 INFO L93 Difference]: Finished difference Result 1497 states and 1921 transitions. [2021-11-03 03:42:38,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:42:38,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-03 03:42:38,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:38,232 INFO L225 Difference]: With dead ends: 1497 [2021-11-03 03:42:38,232 INFO L226 Difference]: Without dead ends: 906 [2021-11-03 03:42:38,233 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:42:38,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-11-03 03:42:39,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 904. [2021-11-03 03:42:39,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 1.2691029900332227) internal successors, (1146), 903 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:39,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1146 transitions. [2021-11-03 03:42:39,085 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1146 transitions. Word has length 96 [2021-11-03 03:42:39,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:39,086 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 1146 transitions. [2021-11-03 03:42:39,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:39,086 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1146 transitions. [2021-11-03 03:42:39,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-03 03:42:39,087 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:39,087 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:39,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-03 03:42:39,088 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:39,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:39,088 INFO L85 PathProgramCache]: Analyzing trace with hash 394598223, now seen corresponding path program 1 times [2021-11-03 03:42:39,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:39,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116037644] [2021-11-03 03:42:39,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:39,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:39,175 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:39,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116037644] [2021-11-03 03:42:39,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116037644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:39,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:39,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 03:42:39,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318167341] [2021-11-03 03:42:39,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 03:42:39,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:39,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 03:42:39,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-03 03:42:39,177 INFO L87 Difference]: Start difference. First operand 904 states and 1146 transitions. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:40,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:40,541 INFO L93 Difference]: Finished difference Result 1252 states and 1568 transitions. [2021-11-03 03:42:40,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-03 03:42:40,542 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-03 03:42:40,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:40,546 INFO L225 Difference]: With dead ends: 1252 [2021-11-03 03:42:40,547 INFO L226 Difference]: Without dead ends: 1250 [2021-11-03 03:42:40,547 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-03 03:42:40,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-11-03 03:42:41,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 904. [2021-11-03 03:42:41,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 1.2513842746400885) internal successors, (1130), 903 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:41,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1130 transitions. [2021-11-03 03:42:41,291 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1130 transitions. Word has length 97 [2021-11-03 03:42:41,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:41,291 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 1130 transitions. [2021-11-03 03:42:41,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:41,292 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1130 transitions. [2021-11-03 03:42:41,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-03 03:42:41,293 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:41,293 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:41,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-03 03:42:41,294 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:41,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:41,294 INFO L85 PathProgramCache]: Analyzing trace with hash -2092320179, now seen corresponding path program 1 times [2021-11-03 03:42:41,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:41,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4085305] [2021-11-03 03:42:41,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:41,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:41,436 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 03:42:41,437 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:41,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4085305] [2021-11-03 03:42:41,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4085305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:41,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:41,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 03:42:41,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348910948] [2021-11-03 03:42:41,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 03:42:41,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:41,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 03:42:41,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:42:41,439 INFO L87 Difference]: Start difference. First operand 904 states and 1130 transitions. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:42,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:42,976 INFO L93 Difference]: Finished difference Result 2247 states and 2823 transitions. [2021-11-03 03:42:42,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 03:42:42,977 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-03 03:42:42,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:42,985 INFO L225 Difference]: With dead ends: 2247 [2021-11-03 03:42:42,985 INFO L226 Difference]: Without dead ends: 1410 [2021-11-03 03:42:42,989 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-11-03 03:42:42,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2021-11-03 03:42:44,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 904. [2021-11-03 03:42:44,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 1.2502768549280177) internal successors, (1129), 903 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:44,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1129 transitions. [2021-11-03 03:42:44,006 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1129 transitions. Word has length 111 [2021-11-03 03:42:44,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:44,007 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 1129 transitions. [2021-11-03 03:42:44,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:44,007 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1129 transitions. [2021-11-03 03:42:44,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-03 03:42:44,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:44,008 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:44,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-03 03:42:44,009 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:44,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:44,009 INFO L85 PathProgramCache]: Analyzing trace with hash 140746375, now seen corresponding path program 1 times [2021-11-03 03:42:44,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:44,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519999900] [2021-11-03 03:42:44,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:44,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 03:42:44,571 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:44,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519999900] [2021-11-03 03:42:44,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519999900] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:44,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:44,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-03 03:42:44,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687846012] [2021-11-03 03:42:44,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-03 03:42:44,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:42:44,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-03 03:42:44,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-11-03 03:42:44,573 INFO L87 Difference]: Start difference. First operand 904 states and 1129 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:48,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:48,310 INFO L93 Difference]: Finished difference Result 3413 states and 4285 transitions. [2021-11-03 03:42:48,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-03 03:42:48,311 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 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 113 [2021-11-03 03:42:48,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:48,320 INFO L225 Difference]: With dead ends: 3413 [2021-11-03 03:42:48,320 INFO L226 Difference]: Without dead ends: 2575 [2021-11-03 03:42:48,323 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2021-11-03 03:42:48,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2575 states. [2021-11-03 03:42:49,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2575 to 919. [2021-11-03 03:42:49,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.2483660130718954) internal successors, (1146), 918 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:49,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1146 transitions. [2021-11-03 03:42:49,064 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1146 transitions. Word has length 113 [2021-11-03 03:42:49,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:49,064 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1146 transitions. [2021-11-03 03:42:49,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:49,064 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1146 transitions. [2021-11-03 03:42:49,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-03 03:42:49,065 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:49,065 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:49,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-03 03:42:49,065 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 03:42:49,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:49,066 INFO L85 PathProgramCache]: Analyzing trace with hash 821235352, now seen corresponding path program 1 times [2021-11-03 03:42:49,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:42:49,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119927110] [2021-11-03 03:42:49,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:49,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:42:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:51,704 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:42:51,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119927110] [2021-11-03 03:42:51,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119927110] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:42:51,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414752297] [2021-11-03 03:42:51,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:51,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:42:51,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_138f439f-d204-4a43-a5b6-30a396fa1ca7/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:42:51,713 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_138f439f-d204-4a43-a5b6-30a396fa1ca7/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:42:51,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_138f439f-d204-4a43-a5b6-30a396fa1ca7/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 03:42:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:51,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-03 03:42:52,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:43:09,997 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:43:09,998 INFO L328 TraceCheckSpWp]: Computing backward predicates...