./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/bin/utaipan-TEXQjIfE4P --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 a158f4486af48c98a7df56cba98940178e8617d42ff04ad885cda239ab95e10a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:21:44,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:21:44,074 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:21:44,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:21:44,147 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:21:44,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:21:44,150 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:21:44,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:21:44,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:21:44,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:21:44,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:21:44,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:21:44,162 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:21:44,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:21:44,166 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:21:44,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:21:44,169 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:21:44,170 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:21:44,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:21:44,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:21:44,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:21:44,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:21:44,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:21:44,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:21:44,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:21:44,204 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:21:44,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:21:44,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:21:44,208 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:21:44,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:21:44,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:21:44,212 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:21:44,215 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:21:44,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:21:44,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:21:44,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:21:44,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:21:44,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:21:44,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:21:44,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:21:44,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:21:44,224 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:21:44,282 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:21:44,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:21:44,283 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:21:44,284 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:21:44,292 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:21:44,292 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:21:44,293 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:21:44,293 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:21:44,293 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:21:44,294 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:21:44,295 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:21:44,295 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:21:44,296 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:21:44,296 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:21:44,296 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:21:44,297 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:21:44,297 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:21:44,297 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:21:44,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:21:44,299 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:21:44,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:21:44,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:21:44,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:21:44,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:21:44,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:21:44,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:21:44,302 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:21:44,302 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:21:44,303 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:21:44,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:21:44,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:21:44,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:21:44,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:21:44,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:21:44,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:21:44,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:21:44,305 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:21:44,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:21:44,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:21:44,306 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:21:44,306 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:21:44,307 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_a9fa6189-8ef2-4e00-9724-23cb67fc850d/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a158f4486af48c98a7df56cba98940178e8617d42ff04ad885cda239ab95e10a [2021-11-21 01:21:44,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:21:44,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:21:44,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:21:44,688 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:21:44,704 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:21:44,706 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-21 01:21:44,804 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/bin/utaipan-TEXQjIfE4P/data/78abc6a61/92af2d92bd9a4a0a9277af50819ecdff/FLAG7ea7d777d [2021-11-21 01:21:45,608 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:21:45,612 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-21 01:21:45,636 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/bin/utaipan-TEXQjIfE4P/data/78abc6a61/92af2d92bd9a4a0a9277af50819ecdff/FLAG7ea7d777d [2021-11-21 01:21:45,819 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/bin/utaipan-TEXQjIfE4P/data/78abc6a61/92af2d92bd9a4a0a9277af50819ecdff [2021-11-21 01:21:45,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:21:45,824 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:21:45,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:21:45,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:21:45,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:21:45,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:21:45" (1/1) ... [2021-11-21 01:21:45,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@581be227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:21:45, skipping insertion in model container [2021-11-21 01:21:45,834 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:21:45" (1/1) ... [2021-11-21 01:21:45,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:21:45,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:21:46,278 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[7119,7132] [2021-11-21 01:21:46,326 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[9806,9819] [2021-11-21 01:21:46,348 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[10897,10910] [2021-11-21 01:21:46,358 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[11503,11516] [2021-11-21 01:21:46,378 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[12922,12935] [2021-11-21 01:21:46,387 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[13528,13541] [2021-11-21 01:21:46,409 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[14457,14470] [2021-11-21 01:21:46,516 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:21:46,529 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:21:46,617 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[7119,7132] [2021-11-21 01:21:46,638 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[9806,9819] [2021-11-21 01:21:46,658 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[10897,10910] [2021-11-21 01:21:46,664 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[11503,11516] [2021-11-21 01:21:46,675 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[12922,12935] [2021-11-21 01:21:46,690 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[13528,13541] [2021-11-21 01:21:46,697 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[14457,14470] [2021-11-21 01:21:46,763 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:21:46,784 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:21:46,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:21:46 WrapperNode [2021-11-21 01:21:46,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:21:46,788 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:21:46,788 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:21:46,789 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:21:46,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:21:46" (1/1) ... [2021-11-21 01:21:46,830 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:21:46" (1/1) ... [2021-11-21 01:21:46,937 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 973 [2021-11-21 01:21:46,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:21:46,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:21:46,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:21:46,939 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:21:46,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:21:46" (1/1) ... [2021-11-21 01:21:46,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:21:46" (1/1) ... [2021-11-21 01:21:46,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:21:46" (1/1) ... [2021-11-21 01:21:46,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:21:46" (1/1) ... [2021-11-21 01:21:46,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:21:46" (1/1) ... [2021-11-21 01:21:46,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:21:46" (1/1) ... [2021-11-21 01:21:46,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:21:46" (1/1) ... [2021-11-21 01:21:46,993 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:21:46,995 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:21:46,995 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:21:46,995 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:21:46,996 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:21:46" (1/1) ... [2021-11-21 01:21:47,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:21:47,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:21:47,064 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:21:47,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:21:47,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:21:47,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:21:47,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:21:47,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:21:47,318 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:21:47,334 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:21:48,450 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:21:48,568 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:21:48,568 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 01:21:48,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:21:48 BoogieIcfgContainer [2021-11-21 01:21:48,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:21:48,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:21:48,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:21:48,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:21:48,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:21:45" (1/3) ... [2021-11-21 01:21:48,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ab97720 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:21:48, skipping insertion in model container [2021-11-21 01:21:48,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:21:46" (2/3) ... [2021-11-21 01:21:48,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ab97720 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:21:48, skipping insertion in model container [2021-11-21 01:21:48,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:21:48" (3/3) ... [2021-11-21 01:21:48,587 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-21 01:21:48,594 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:21:48,594 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-21 01:21:48,656 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:21:48,669 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 [2021-11-21 01:21:48,669 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-21 01:21:48,710 INFO L276 IsEmpty]: Start isEmpty. Operand has 189 states, 181 states have (on average 1.8342541436464088) internal successors, (332), 188 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:48,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-21 01:21:48,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:48,737 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:21:48,737 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-21 01:21:48,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:48,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1585983530, now seen corresponding path program 1 times [2021-11-21 01:21:48,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:48,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812955916] [2021-11-21 01:21:48,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:48,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:49,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:21:49,148 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:49,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812955916] [2021-11-21 01:21:49,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812955916] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:21:49,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:21:49,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:21:49,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124939933] [2021-11-21 01:21:49,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:21:49,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:21:49,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:49,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:21:49,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:21:49,207 INFO L87 Difference]: Start difference. First operand has 189 states, 181 states have (on average 1.8342541436464088) internal successors, (332), 188 states have internal predecessors, (332), 0 states have call successors, (0), 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 9.0) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:49,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:49,622 INFO L93 Difference]: Finished difference Result 303 states and 509 transitions. [2021-11-21 01:21:49,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:21:49,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-11-21 01:21:49,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:49,646 INFO L225 Difference]: With dead ends: 303 [2021-11-21 01:21:49,647 INFO L226 Difference]: Without dead ends: 167 [2021-11-21 01:21:49,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:21:49,658 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 758 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:49,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 220 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:21:49,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-21 01:21:49,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-11-21 01:21:49,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 160 states have (on average 1.23125) internal successors, (197), 166 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:49,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 197 transitions. [2021-11-21 01:21:49,728 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 197 transitions. Word has length 45 [2021-11-21 01:21:49,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:49,728 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 197 transitions. [2021-11-21 01:21:49,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:49,729 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 197 transitions. [2021-11-21 01:21:49,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-21 01:21:49,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:49,733 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:21:49,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:21:49,734 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-21 01:21:49,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:49,735 INFO L85 PathProgramCache]: Analyzing trace with hash -496068033, now seen corresponding path program 1 times [2021-11-21 01:21:49,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:49,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738377106] [2021-11-21 01:21:49,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:49,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:21:49,867 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:49,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738377106] [2021-11-21 01:21:49,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738377106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:21:49,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:21:49,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:21:49,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2895841] [2021-11-21 01:21:49,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:21:49,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:21:49,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:49,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:21:49,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:21:49,878 INFO L87 Difference]: Start difference. First operand 167 states and 197 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:50,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:50,107 INFO L93 Difference]: Finished difference Result 275 states and 332 transitions. [2021-11-21 01:21:50,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:21:50,109 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2021-11-21 01:21:50,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:50,112 INFO L225 Difference]: With dead ends: 275 [2021-11-21 01:21:50,114 INFO L226 Difference]: Without dead ends: 151 [2021-11-21 01:21:50,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:21:50,120 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 490 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:50,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 114 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:21:50,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-21 01:21:50,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-11-21 01:21:50,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 144 states have (on average 1.2361111111111112) internal successors, (178), 150 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:50,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 178 transitions. [2021-11-21 01:21:50,168 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 178 transitions. Word has length 46 [2021-11-21 01:21:50,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:50,169 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 178 transitions. [2021-11-21 01:21:50,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:50,170 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 178 transitions. [2021-11-21 01:21:50,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-21 01:21:50,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:50,176 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:21:50,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:21:50,177 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-21 01:21:50,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:50,178 INFO L85 PathProgramCache]: Analyzing trace with hash -490260021, now seen corresponding path program 1 times [2021-11-21 01:21:50,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:50,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679790955] [2021-11-21 01:21:50,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:50,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:50,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:21:50,299 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:50,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679790955] [2021-11-21 01:21:50,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679790955] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:21:50,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:21:50,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:21:50,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566010030] [2021-11-21 01:21:50,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:21:50,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:21:50,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:50,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:21:50,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:21:50,303 INFO L87 Difference]: Start difference. First operand 151 states and 178 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:50,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:50,549 INFO L93 Difference]: Finished difference Result 328 states and 397 transitions. [2021-11-21 01:21:50,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:21:50,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2021-11-21 01:21:50,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:50,557 INFO L225 Difference]: With dead ends: 328 [2021-11-21 01:21:50,557 INFO L226 Difference]: Without dead ends: 209 [2021-11-21 01:21:50,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:21:50,563 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 581 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:50,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [581 Valid, 166 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:21:50,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-21 01:21:50,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 185. [2021-11-21 01:21:50,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 178 states have (on average 1.2752808988764044) internal successors, (227), 184 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:50,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 227 transitions. [2021-11-21 01:21:50,610 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 227 transitions. Word has length 47 [2021-11-21 01:21:50,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:50,611 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 227 transitions. [2021-11-21 01:21:50,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:50,612 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 227 transitions. [2021-11-21 01:21:50,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-21 01:21:50,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:50,621 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:21:50,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:21:50,621 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-21 01:21:50,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:50,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1960134064, now seen corresponding path program 1 times [2021-11-21 01:21:50,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:50,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957796473] [2021-11-21 01:21:50,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:50,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:50,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:21:50,909 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:50,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957796473] [2021-11-21 01:21:50,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957796473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:21:50,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:21:50,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:21:50,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059902340] [2021-11-21 01:21:50,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:21:50,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:21:50,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:50,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:21:50,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:21:50,920 INFO L87 Difference]: Start difference. First operand 185 states and 227 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:51,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:51,666 INFO L93 Difference]: Finished difference Result 410 states and 518 transitions. [2021-11-21 01:21:51,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 01:21:51,667 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-11-21 01:21:51,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:51,671 INFO L225 Difference]: With dead ends: 410 [2021-11-21 01:21:51,672 INFO L226 Difference]: Without dead ends: 405 [2021-11-21 01:21:51,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-21 01:21:51,684 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 565 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:51,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 669 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:21:51,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-21 01:21:51,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 185. [2021-11-21 01:21:51,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 178 states have (on average 1.2696629213483146) internal successors, (226), 184 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:51,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 226 transitions. [2021-11-21 01:21:51,746 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 226 transitions. Word has length 48 [2021-11-21 01:21:51,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:51,748 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 226 transitions. [2021-11-21 01:21:51,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:51,749 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 226 transitions. [2021-11-21 01:21:51,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-21 01:21:51,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:51,752 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:21:51,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:21:51,753 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-21 01:21:51,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:51,756 INFO L85 PathProgramCache]: Analyzing trace with hash -47936962, now seen corresponding path program 1 times [2021-11-21 01:21:51,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:51,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110332702] [2021-11-21 01:21:51,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:51,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:21:51,969 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:51,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110332702] [2021-11-21 01:21:51,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110332702] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:21:51,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:21:51,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:21:51,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963650356] [2021-11-21 01:21:51,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:21:51,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:21:51,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:51,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:21:51,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:21:51,971 INFO L87 Difference]: Start difference. First operand 185 states and 226 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:52,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:52,636 INFO L93 Difference]: Finished difference Result 387 states and 484 transitions. [2021-11-21 01:21:52,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-21 01:21:52,637 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-11-21 01:21:52,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:52,641 INFO L225 Difference]: With dead ends: 387 [2021-11-21 01:21:52,641 INFO L226 Difference]: Without dead ends: 316 [2021-11-21 01:21:52,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:21:52,656 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 688 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:52,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 535 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:21:52,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-21 01:21:52,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 185. [2021-11-21 01:21:52,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 178 states have (on average 1.2640449438202248) internal successors, (225), 184 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:52,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 225 transitions. [2021-11-21 01:21:52,697 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 225 transitions. Word has length 48 [2021-11-21 01:21:52,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:52,698 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 225 transitions. [2021-11-21 01:21:52,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:52,698 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 225 transitions. [2021-11-21 01:21:52,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-21 01:21:52,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:52,700 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:21:52,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:21:52,701 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-21 01:21:52,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:52,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1498142210, now seen corresponding path program 1 times [2021-11-21 01:21:52,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:52,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775930096] [2021-11-21 01:21:52,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:52,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:52,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:21:52,889 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:52,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775930096] [2021-11-21 01:21:52,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775930096] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:21:52,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:21:52,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:21:52,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801864296] [2021-11-21 01:21:52,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:21:52,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:21:52,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:52,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:21:52,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:21:52,892 INFO L87 Difference]: Start difference. First operand 185 states and 225 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:53,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:53,253 INFO L93 Difference]: Finished difference Result 369 states and 452 transitions. [2021-11-21 01:21:53,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:21:53,254 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-11-21 01:21:53,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:53,256 INFO L225 Difference]: With dead ends: 369 [2021-11-21 01:21:53,256 INFO L226 Difference]: Without dead ends: 275 [2021-11-21 01:21:53,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:21:53,258 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 607 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:53,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [607 Valid, 346 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:21:53,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-21 01:21:53,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 185. [2021-11-21 01:21:53,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 178 states have (on average 1.2584269662921348) internal successors, (224), 184 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:53,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 224 transitions. [2021-11-21 01:21:53,286 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 224 transitions. Word has length 48 [2021-11-21 01:21:53,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:53,287 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 224 transitions. [2021-11-21 01:21:53,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:53,287 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 224 transitions. [2021-11-21 01:21:53,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-21 01:21:53,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:53,289 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:21:53,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:21:53,289 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-21 01:21:53,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:53,290 INFO L85 PathProgramCache]: Analyzing trace with hash -2131378021, now seen corresponding path program 1 times [2021-11-21 01:21:53,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:53,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235712114] [2021-11-21 01:21:53,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:53,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:21:53,854 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:53,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235712114] [2021-11-21 01:21:53,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235712114] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:21:53,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:21:53,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-21 01:21:53,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359234696] [2021-11-21 01:21:53,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:21:53,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 01:21:53,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:53,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 01:21:53,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:21:53,856 INFO L87 Difference]: Start difference. First operand 185 states and 224 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:55,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:55,028 INFO L93 Difference]: Finished difference Result 462 states and 563 transitions. [2021-11-21 01:21:55,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-21 01:21:55,029 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-11-21 01:21:55,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:55,033 INFO L225 Difference]: With dead ends: 462 [2021-11-21 01:21:55,033 INFO L226 Difference]: Without dead ends: 458 [2021-11-21 01:21:55,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-11-21 01:21:55,035 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 862 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:55,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [862 Valid, 1341 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:21:55,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-11-21 01:21:55,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 181. [2021-11-21 01:21:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 175 states have (on average 1.2571428571428571) internal successors, (220), 180 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:55,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 220 transitions. [2021-11-21 01:21:55,103 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 220 transitions. Word has length 50 [2021-11-21 01:21:55,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:55,104 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 220 transitions. [2021-11-21 01:21:55,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:55,104 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 220 transitions. [2021-11-21 01:21:55,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-21 01:21:55,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:55,105 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:21:55,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:21:55,106 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-21 01:21:55,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:55,108 INFO L85 PathProgramCache]: Analyzing trace with hash -56699219, now seen corresponding path program 1 times [2021-11-21 01:21:55,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:55,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369551293] [2021-11-21 01:21:55,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:55,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:55,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:21:55,509 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:55,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369551293] [2021-11-21 01:21:55,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369551293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:21:55,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:21:55,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-21 01:21:55,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322096380] [2021-11-21 01:21:55,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:21:55,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:21:55,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:55,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:21:55,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:21:55,512 INFO L87 Difference]: Start difference. First operand 181 states and 220 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:56,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:56,298 INFO L93 Difference]: Finished difference Result 393 states and 490 transitions. [2021-11-21 01:21:56,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:21:56,299 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-11-21 01:21:56,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:56,305 INFO L225 Difference]: With dead ends: 393 [2021-11-21 01:21:56,305 INFO L226 Difference]: Without dead ends: 306 [2021-11-21 01:21:56,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:21:56,308 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 700 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:56,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 664 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:21:56,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-21 01:21:56,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 148. [2021-11-21 01:21:56,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 145 states have (on average 1.2482758620689656) internal successors, (181), 147 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:56,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 181 transitions. [2021-11-21 01:21:56,377 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 181 transitions. Word has length 50 [2021-11-21 01:21:56,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:56,378 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 181 transitions. [2021-11-21 01:21:56,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:56,379 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 181 transitions. [2021-11-21 01:21:56,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-21 01:21:56,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:56,380 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:21:56,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:21:56,380 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-21 01:21:56,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:56,381 INFO L85 PathProgramCache]: Analyzing trace with hash -932698590, now seen corresponding path program 1 times [2021-11-21 01:21:56,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:56,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268077084] [2021-11-21 01:21:56,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:56,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:56,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:21:56,564 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:56,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268077084] [2021-11-21 01:21:56,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268077084] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:21:56,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:21:56,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:21:56,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540765943] [2021-11-21 01:21:56,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:21:56,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:21:56,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:56,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:21:56,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:21:56,569 INFO L87 Difference]: Start difference. First operand 148 states and 181 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:56,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:56,962 INFO L93 Difference]: Finished difference Result 245 states and 302 transitions. [2021-11-21 01:21:56,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:21:56,963 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-11-21 01:21:56,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:56,965 INFO L225 Difference]: With dead ends: 245 [2021-11-21 01:21:56,965 INFO L226 Difference]: Without dead ends: 238 [2021-11-21 01:21:56,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:21:56,968 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 355 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:56,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 400 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:21:56,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-21 01:21:57,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 148. [2021-11-21 01:21:57,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 145 states have (on average 1.2413793103448276) internal successors, (180), 147 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:57,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 180 transitions. [2021-11-21 01:21:57,002 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 180 transitions. Word has length 51 [2021-11-21 01:21:57,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:57,002 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 180 transitions. [2021-11-21 01:21:57,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:57,003 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 180 transitions. [2021-11-21 01:21:57,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-21 01:21:57,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:57,004 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:21:57,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:21:57,004 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-21 01:21:57,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:57,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1469455582, now seen corresponding path program 1 times [2021-11-21 01:21:57,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:57,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370174670] [2021-11-21 01:21:57,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:57,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:57,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:57,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:21:57,131 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:57,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370174670] [2021-11-21 01:21:57,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370174670] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:21:57,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:21:57,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:21:57,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128070630] [2021-11-21 01:21:57,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:21:57,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:21:57,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:57,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:21:57,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:21:57,134 INFO L87 Difference]: Start difference. First operand 148 states and 180 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:57,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:57,428 INFO L93 Difference]: Finished difference Result 235 states and 292 transitions. [2021-11-21 01:21:57,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:21:57,429 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-11-21 01:21:57,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:57,431 INFO L225 Difference]: With dead ends: 235 [2021-11-21 01:21:57,431 INFO L226 Difference]: Without dead ends: 151 [2021-11-21 01:21:57,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-11-21 01:21:57,433 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 349 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:57,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 233 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:21:57,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-21 01:21:57,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2021-11-21 01:21:57,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 145 states have (on average 1.2275862068965517) internal successors, (178), 147 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:57,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 178 transitions. [2021-11-21 01:21:57,470 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 178 transitions. Word has length 51 [2021-11-21 01:21:57,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:57,470 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 178 transitions. [2021-11-21 01:21:57,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:57,488 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 178 transitions. [2021-11-21 01:21:57,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-21 01:21:57,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:57,489 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:21:57,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:21:57,490 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-21 01:21:57,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:57,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1554093006, now seen corresponding path program 1 times [2021-11-21 01:21:57,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:57,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9620042] [2021-11-21 01:21:57,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:57,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:21:57,941 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:57,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9620042] [2021-11-21 01:21:57,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9620042] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:21:57,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:21:57,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-21 01:21:57,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709458101] [2021-11-21 01:21:57,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:21:57,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 01:21:57,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:57,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 01:21:57,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:21:57,945 INFO L87 Difference]: Start difference. First operand 148 states and 178 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:58,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:58,761 INFO L93 Difference]: Finished difference Result 171 states and 200 transitions. [2021-11-21 01:21:58,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 01:21:58,762 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-11-21 01:21:58,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:58,763 INFO L225 Difference]: With dead ends: 171 [2021-11-21 01:21:58,764 INFO L226 Difference]: Without dead ends: 163 [2021-11-21 01:21:58,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2021-11-21 01:21:58,765 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 227 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:58,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 819 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:21:58,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-21 01:21:58,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 151. [2021-11-21 01:21:58,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 148 states have (on average 1.222972972972973) internal successors, (181), 150 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:58,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 181 transitions. [2021-11-21 01:21:58,799 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 181 transitions. Word has length 53 [2021-11-21 01:21:58,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:58,799 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 181 transitions. [2021-11-21 01:21:58,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:58,800 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 181 transitions. [2021-11-21 01:21:58,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-21 01:21:58,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:58,801 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:21:58,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 01:21:58,801 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-21 01:21:58,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:58,802 INFO L85 PathProgramCache]: Analyzing trace with hash 188086898, now seen corresponding path program 1 times [2021-11-21 01:21:58,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:58,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732217888] [2021-11-21 01:21:58,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:58,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:21:59,221 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:59,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732217888] [2021-11-21 01:21:59,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732217888] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:21:59,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:21:59,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-21 01:21:59,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392067260] [2021-11-21 01:21:59,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:21:59,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 01:21:59,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:59,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 01:21:59,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:21:59,224 INFO L87 Difference]: Start difference. First operand 151 states and 181 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:00,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:22:00,576 INFO L93 Difference]: Finished difference Result 615 states and 790 transitions. [2021-11-21 01:22:00,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 01:22:00,577 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-11-21 01:22:00,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:22:00,581 INFO L225 Difference]: With dead ends: 615 [2021-11-21 01:22:00,582 INFO L226 Difference]: Without dead ends: 609 [2021-11-21 01:22:00,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-11-21 01:22:00,585 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 584 mSDsluCounter, 1736 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 1889 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:22:00,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [584 Valid, 1889 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:22:00,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-11-21 01:22:00,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 145. [2021-11-21 01:22:00,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 143 states have (on average 1.2167832167832169) internal successors, (174), 144 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 174 transitions. [2021-11-21 01:22:00,626 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 174 transitions. Word has length 53 [2021-11-21 01:22:00,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:22:00,627 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 174 transitions. [2021-11-21 01:22:00,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:00,627 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 174 transitions. [2021-11-21 01:22:00,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-21 01:22:00,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:22:00,630 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:22:00,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 01:22:00,630 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-21 01:22:00,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:22:00,631 INFO L85 PathProgramCache]: Analyzing trace with hash 59376147, now seen corresponding path program 1 times [2021-11-21 01:22:00,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:22:00,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128540532] [2021-11-21 01:22:00,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:22:00,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:22:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:22:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:22:01,235 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:22:01,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128540532] [2021-11-21 01:22:01,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128540532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:22:01,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:22:01,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-21 01:22:01,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667755477] [2021-11-21 01:22:01,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:22:01,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 01:22:01,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:22:01,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 01:22:01,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:22:01,237 INFO L87 Difference]: Start difference. First operand 145 states and 174 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:02,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:22:02,624 INFO L93 Difference]: Finished difference Result 316 states and 398 transitions. [2021-11-21 01:22:02,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 01:22:02,624 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-21 01:22:02,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:22:02,627 INFO L225 Difference]: With dead ends: 316 [2021-11-21 01:22:02,627 INFO L226 Difference]: Without dead ends: 304 [2021-11-21 01:22:02,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-11-21 01:22:02,629 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 539 mSDsluCounter, 1283 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 1379 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:22:02,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 1379 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:22:02,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-21 01:22:02,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 142. [2021-11-21 01:22:02,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 140 states have (on average 1.2142857142857142) internal successors, (170), 141 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) [2021-11-21 01:22:02,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 170 transitions. [2021-11-21 01:22:02,670 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 170 transitions. Word has length 54 [2021-11-21 01:22:02,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:22:02,670 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 170 transitions. [2021-11-21 01:22:02,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:02,671 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 170 transitions. [2021-11-21 01:22:02,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-21 01:22:02,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:22:02,672 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:22:02,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 01:22:02,673 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-21 01:22:02,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:22:02,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1487882163, now seen corresponding path program 1 times [2021-11-21 01:22:02,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:22:02,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127470902] [2021-11-21 01:22:02,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:22:02,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:22:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:22:03,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:22:03,539 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:22:03,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127470902] [2021-11-21 01:22:03,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127470902] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:22:03,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:22:03,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-21 01:22:03,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780062337] [2021-11-21 01:22:03,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:22:03,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-21 01:22:03,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:22:03,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-21 01:22:03,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:22:03,542 INFO L87 Difference]: Start difference. First operand 142 states and 170 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:05,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:22:05,548 INFO L93 Difference]: Finished difference Result 230 states and 281 transitions. [2021-11-21 01:22:05,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-21 01:22:05,548 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-21 01:22:05,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:22:05,550 INFO L225 Difference]: With dead ends: 230 [2021-11-21 01:22:05,550 INFO L226 Difference]: Without dead ends: 222 [2021-11-21 01:22:05,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=228, Invalid=1032, Unknown=0, NotChecked=0, Total=1260 [2021-11-21 01:22:05,552 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 235 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1542 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:22:05,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 1542 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:22:05,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-21 01:22:05,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 142. [2021-11-21 01:22:05,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 140 states have (on average 1.207142857142857) internal successors, (169), 141 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 169 transitions. [2021-11-21 01:22:05,593 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 169 transitions. Word has length 54 [2021-11-21 01:22:05,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:22:05,594 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 169 transitions. [2021-11-21 01:22:05,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:05,594 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 169 transitions. [2021-11-21 01:22:05,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-21 01:22:05,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:22:05,595 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:22:05,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 01:22:05,596 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-21 01:22:05,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:22:05,597 INFO L85 PathProgramCache]: Analyzing trace with hash -128674126, now seen corresponding path program 1 times [2021-11-21 01:22:05,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:22:05,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110336826] [2021-11-21 01:22:05,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:22:05,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:22:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:22:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:22:06,165 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:22:06,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110336826] [2021-11-21 01:22:06,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110336826] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:22:06,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:22:06,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-21 01:22:06,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517275435] [2021-11-21 01:22:06,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:22:06,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-21 01:22:06,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:22:06,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-21 01:22:06,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:22:06,168 INFO L87 Difference]: Start difference. First operand 142 states and 169 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:07,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:22:07,279 INFO L93 Difference]: Finished difference Result 222 states and 273 transitions. [2021-11-21 01:22:07,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 01:22:07,280 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-21 01:22:07,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:22:07,282 INFO L225 Difference]: With dead ends: 222 [2021-11-21 01:22:07,282 INFO L226 Difference]: Without dead ends: 210 [2021-11-21 01:22:07,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:22:07,287 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 201 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1137 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:22:07,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 1137 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:22:07,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-21 01:22:07,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 130. [2021-11-21 01:22:07,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.2170542635658914) internal successors, (157), 129 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:07,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 157 transitions. [2021-11-21 01:22:07,333 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 157 transitions. Word has length 55 [2021-11-21 01:22:07,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:22:07,333 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 157 transitions. [2021-11-21 01:22:07,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:07,334 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 157 transitions. [2021-11-21 01:22:07,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-21 01:22:07,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:22:07,335 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:22:07,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 01:22:07,336 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-21 01:22:07,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:22:07,336 INFO L85 PathProgramCache]: Analyzing trace with hash 60842824, now seen corresponding path program 1 times [2021-11-21 01:22:07,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:22:07,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462853935] [2021-11-21 01:22:07,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:22:07,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:22:07,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:22:07,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:22:07,399 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:22:07,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462853935] [2021-11-21 01:22:07,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462853935] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:22:07,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:22:07,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:22:07,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341306331] [2021-11-21 01:22:07,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:22:07,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:22:07,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:22:07,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:22:07,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:22:07,405 INFO L87 Difference]: Start difference. First operand 130 states and 157 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:07,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:22:07,515 INFO L93 Difference]: Finished difference Result 192 states and 241 transitions. [2021-11-21 01:22:07,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:22:07,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-21 01:22:07,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:22:07,518 INFO L225 Difference]: With dead ends: 192 [2021-11-21 01:22:07,518 INFO L226 Difference]: Without dead ends: 164 [2021-11-21 01:22:07,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:22:07,520 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 42 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:22:07,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 185 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:22:07,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-21 01:22:07,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 154. [2021-11-21 01:22:07,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.2352941176470589) internal successors, (189), 153 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:07,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 189 transitions. [2021-11-21 01:22:07,583 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 189 transitions. Word has length 64 [2021-11-21 01:22:07,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:22:07,583 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 189 transitions. [2021-11-21 01:22:07,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:07,584 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 189 transitions. [2021-11-21 01:22:07,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-21 01:22:07,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:22:07,585 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:22:07,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 01:22:07,585 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-21 01:22:07,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:22:07,586 INFO L85 PathProgramCache]: Analyzing trace with hash -180323937, now seen corresponding path program 1 times [2021-11-21 01:22:07,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:22:07,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518189384] [2021-11-21 01:22:07,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:22:07,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:22:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:22:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:22:07,645 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:22:07,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518189384] [2021-11-21 01:22:07,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518189384] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:22:07,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:22:07,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:22:07,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911823591] [2021-11-21 01:22:07,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:22:07,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:22:07,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:22:07,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:22:07,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:22:07,649 INFO L87 Difference]: Start difference. First operand 154 states and 189 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:07,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:22:07,777 INFO L93 Difference]: Finished difference Result 306 states and 397 transitions. [2021-11-21 01:22:07,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:22:07,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-21 01:22:07,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:22:07,780 INFO L225 Difference]: With dead ends: 306 [2021-11-21 01:22:07,780 INFO L226 Difference]: Without dead ends: 230 [2021-11-21 01:22:07,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:22:07,782 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 35 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:22:07,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 185 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:22:07,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-21 01:22:07,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 216. [2021-11-21 01:22:07,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.2744186046511627) internal successors, (274), 215 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) [2021-11-21 01:22:07,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 274 transitions. [2021-11-21 01:22:07,881 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 274 transitions. Word has length 67 [2021-11-21 01:22:07,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:22:07,881 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 274 transitions. [2021-11-21 01:22:07,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:07,882 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 274 transitions. [2021-11-21 01:22:07,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-21 01:22:07,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:22:07,883 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:22:07,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-21 01:22:07,884 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-21 01:22:07,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:22:07,885 INFO L85 PathProgramCache]: Analyzing trace with hash -958429519, now seen corresponding path program 1 times [2021-11-21 01:22:07,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:22:07,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277060960] [2021-11-21 01:22:07,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:22:07,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:22:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:22:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:22:07,937 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:22:07,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277060960] [2021-11-21 01:22:07,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277060960] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:22:07,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:22:07,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:22:07,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295455134] [2021-11-21 01:22:07,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:22:07,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:22:07,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:22:07,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:22:07,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:22:07,940 INFO L87 Difference]: Start difference. First operand 216 states and 274 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:08,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:22:08,144 INFO L93 Difference]: Finished difference Result 492 states and 652 transitions. [2021-11-21 01:22:08,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:22:08,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-21 01:22:08,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:22:08,148 INFO L225 Difference]: With dead ends: 492 [2021-11-21 01:22:08,148 INFO L226 Difference]: Without dead ends: 354 [2021-11-21 01:22:08,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:22:08,150 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 25 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:22:08,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 185 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:22:08,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-11-21 01:22:08,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 328. [2021-11-21 01:22:08,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.3027522935779816) internal successors, (426), 327 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:08,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 426 transitions. [2021-11-21 01:22:08,279 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 426 transitions. Word has length 70 [2021-11-21 01:22:08,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:22:08,279 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 426 transitions. [2021-11-21 01:22:08,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:08,280 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 426 transitions. [2021-11-21 01:22:08,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-21 01:22:08,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:22:08,281 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:22:08,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-21 01:22:08,282 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-21 01:22:08,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:22:08,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1145699154, now seen corresponding path program 1 times [2021-11-21 01:22:08,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:22:08,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930241969] [2021-11-21 01:22:08,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:22:08,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:22:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:22:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:22:08,344 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:22:08,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930241969] [2021-11-21 01:22:08,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930241969] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:22:08,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:22:08,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:22:08,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545756424] [2021-11-21 01:22:08,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:22:08,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:22:08,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:22:08,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:22:08,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:22:08,347 INFO L87 Difference]: Start difference. First operand 328 states and 426 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:08,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:22:08,882 INFO L93 Difference]: Finished difference Result 1102 states and 1470 transitions. [2021-11-21 01:22:08,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:22:08,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-21 01:22:08,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:22:08,889 INFO L225 Difference]: With dead ends: 1102 [2021-11-21 01:22:08,889 INFO L226 Difference]: Without dead ends: 852 [2021-11-21 01:22:08,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:22:08,891 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 289 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:22:08,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 372 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:22:08,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-11-21 01:22:09,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 488. [2021-11-21 01:22:09,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 1.3018480492813143) internal successors, (634), 487 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:09,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 634 transitions. [2021-11-21 01:22:09,160 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 634 transitions. Word has length 73 [2021-11-21 01:22:09,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:22:09,160 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 634 transitions. [2021-11-21 01:22:09,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:09,161 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 634 transitions. [2021-11-21 01:22:09,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-21 01:22:09,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:22:09,162 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:22:09,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-21 01:22:09,163 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-21 01:22:09,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:22:09,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1071527444, now seen corresponding path program 1 times [2021-11-21 01:22:09,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:22:09,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360517636] [2021-11-21 01:22:09,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:22:09,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:22:09,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:22:09,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:22:09,279 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:22:09,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360517636] [2021-11-21 01:22:09,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360517636] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:22:09,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:22:09,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:22:09,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609551514] [2021-11-21 01:22:09,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:22:09,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:22:09,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:22:09,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:22:09,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:22:09,282 INFO L87 Difference]: Start difference. First operand 488 states and 634 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:09,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:22:09,636 INFO L93 Difference]: Finished difference Result 900 states and 1184 transitions. [2021-11-21 01:22:09,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:22:09,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-21 01:22:09,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:22:09,641 INFO L225 Difference]: With dead ends: 900 [2021-11-21 01:22:09,641 INFO L226 Difference]: Without dead ends: 490 [2021-11-21 01:22:09,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:22:09,643 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 146 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:22:09,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 191 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:22:09,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-21 01:22:09,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 488. [2021-11-21 01:22:09,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 1.297741273100616) internal successors, (632), 487 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:09,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 632 transitions. [2021-11-21 01:22:09,874 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 632 transitions. Word has length 75 [2021-11-21 01:22:09,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:22:09,874 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 632 transitions. [2021-11-21 01:22:09,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:09,875 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 632 transitions. [2021-11-21 01:22:09,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-21 01:22:09,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:22:09,876 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:22:09,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-21 01:22:09,877 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-21 01:22:09,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:22:09,877 INFO L85 PathProgramCache]: Analyzing trace with hash 935769857, now seen corresponding path program 1 times [2021-11-21 01:22:09,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:22:09,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291590481] [2021-11-21 01:22:09,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:22:09,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:22:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:22:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:22:09,926 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:22:09,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291590481] [2021-11-21 01:22:09,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291590481] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:22:09,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:22:09,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:22:09,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431157363] [2021-11-21 01:22:09,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:22:09,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:22:09,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:22:09,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:22:09,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:22:09,929 INFO L87 Difference]: Start difference. First operand 488 states and 632 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:10,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:22:10,264 INFO L93 Difference]: Finished difference Result 996 states and 1312 transitions. [2021-11-21 01:22:10,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:22:10,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-21 01:22:10,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:22:10,269 INFO L225 Difference]: With dead ends: 996 [2021-11-21 01:22:10,270 INFO L226 Difference]: Without dead ends: 586 [2021-11-21 01:22:10,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:22:10,272 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 51 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:22:10,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 142 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:22:10,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-21 01:22:10,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 584. [2021-11-21 01:22:10,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 1.2933104631217838) internal successors, (754), 583 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:10,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 754 transitions. [2021-11-21 01:22:10,564 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 754 transitions. Word has length 75 [2021-11-21 01:22:10,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:22:10,564 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 754 transitions. [2021-11-21 01:22:10,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:10,565 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 754 transitions. [2021-11-21 01:22:10,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-21 01:22:10,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:22:10,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:22:10,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-21 01:22:10,567 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-21 01:22:10,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:22:10,567 INFO L85 PathProgramCache]: Analyzing trace with hash -597572476, now seen corresponding path program 1 times [2021-11-21 01:22:10,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:22:10,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952501518] [2021-11-21 01:22:10,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:22:10,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:22:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:22:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:22:10,671 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:22:10,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952501518] [2021-11-21 01:22:10,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952501518] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:22:10,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:22:10,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:22:10,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786793822] [2021-11-21 01:22:10,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:22:10,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:22:10,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:22:10,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:22:10,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:22:10,675 INFO L87 Difference]: Start difference. First operand 584 states and 754 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:11,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:22:11,291 INFO L93 Difference]: Finished difference Result 790 states and 1001 transitions. [2021-11-21 01:22:11,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 01:22:11,291 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-21 01:22:11,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:22:11,297 INFO L225 Difference]: With dead ends: 790 [2021-11-21 01:22:11,298 INFO L226 Difference]: Without dead ends: 788 [2021-11-21 01:22:11,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:22:11,299 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 205 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:22:11,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 584 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:22:11,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-11-21 01:22:11,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 584. [2021-11-21 01:22:11,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 1.2727272727272727) internal successors, (742), 583 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:11,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 742 transitions. [2021-11-21 01:22:11,645 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 742 transitions. Word has length 76 [2021-11-21 01:22:11,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:22:11,646 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 742 transitions. [2021-11-21 01:22:11,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:11,647 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 742 transitions. [2021-11-21 01:22:11,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-21 01:22:11,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:22:11,648 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 01:22:11,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-21 01:22:11,649 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-21 01:22:11,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:22:11,650 INFO L85 PathProgramCache]: Analyzing trace with hash -619247491, now seen corresponding path program 1 times [2021-11-21 01:22:11,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:22:11,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610408933] [2021-11-21 01:22:11,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:22:11,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:22:11,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:22:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:22:11,906 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:22:11,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610408933] [2021-11-21 01:22:11,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610408933] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:22:11,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:22:11,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-21 01:22:11,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060478655] [2021-11-21 01:22:11,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:22:11,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 01:22:11,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:22:11,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 01:22:11,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:22:11,909 INFO L87 Difference]: Start difference. First operand 584 states and 742 transitions. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:14,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:22:14,355 INFO L93 Difference]: Finished difference Result 2556 states and 3261 transitions. [2021-11-21 01:22:14,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-21 01:22:14,356 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 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 87 [2021-11-21 01:22:14,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:22:14,369 INFO L225 Difference]: With dead ends: 2556 [2021-11-21 01:22:14,369 INFO L226 Difference]: Without dead ends: 2036 [2021-11-21 01:22:14,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2021-11-21 01:22:14,372 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 1120 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:22:14,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1120 Valid, 611 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:22:14,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-11-21 01:22:14,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 592. [2021-11-21 01:22:14,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 591 states have (on average 1.2690355329949239) internal successors, (750), 591 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:14,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 750 transitions. [2021-11-21 01:22:14,780 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 750 transitions. Word has length 87 [2021-11-21 01:22:14,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:22:14,780 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 750 transitions. [2021-11-21 01:22:14,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:14,781 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 750 transitions. [2021-11-21 01:22:14,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-21 01:22:14,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:22:14,783 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 01:22:14,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-21 01:22:14,784 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-21 01:22:14,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:22:14,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1184203326, now seen corresponding path program 1 times [2021-11-21 01:22:14,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:22:14,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608431673] [2021-11-21 01:22:14,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:22:14,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:22:14,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:22:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:22:14,922 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:22:14,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608431673] [2021-11-21 01:22:14,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608431673] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:22:14,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:22:14,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:22:14,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581447600] [2021-11-21 01:22:14,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:22:14,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:22:14,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:22:14,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:22:14,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:22:14,926 INFO L87 Difference]: Start difference. First operand 592 states and 750 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 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) [2021-11-21 01:22:15,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:22:15,890 INFO L93 Difference]: Finished difference Result 1460 states and 1863 transitions. [2021-11-21 01:22:15,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 01:22:15,890 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 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 88 [2021-11-21 01:22:15,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:22:15,896 INFO L225 Difference]: With dead ends: 1460 [2021-11-21 01:22:15,897 INFO L226 Difference]: Without dead ends: 940 [2021-11-21 01:22:15,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:22:15,899 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 329 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:22:15,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 261 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:22:15,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-11-21 01:22:16,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 584. [2021-11-21 01:22:16,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 1.2692967409948541) internal successors, (740), 583 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:16,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 740 transitions. [2021-11-21 01:22:16,167 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 740 transitions. Word has length 88 [2021-11-21 01:22:16,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:22:16,167 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 740 transitions. [2021-11-21 01:22:16,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 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) [2021-11-21 01:22:16,168 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 740 transitions. [2021-11-21 01:22:16,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-21 01:22:16,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:22:16,170 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:22:16,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-21 01:22:16,170 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-21 01:22:16,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:22:16,171 INFO L85 PathProgramCache]: Analyzing trace with hash -187165765, now seen corresponding path program 1 times [2021-11-21 01:22:16,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:22:16,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875318277] [2021-11-21 01:22:16,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:22:16,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:22:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:22:16,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:22:16,559 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:22:16,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875318277] [2021-11-21 01:22:16,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875318277] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:22:16,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:22:16,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-21 01:22:16,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168828174] [2021-11-21 01:22:16,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:22:16,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 01:22:16,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:22:16,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 01:22:16,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:22:16,562 INFO L87 Difference]: Start difference. First operand 584 states and 740 transitions. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:17,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:22:17,996 INFO L93 Difference]: Finished difference Result 1620 states and 2079 transitions. [2021-11-21 01:22:17,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 01:22:17,997 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 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 89 [2021-11-21 01:22:17,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:22:18,004 INFO L225 Difference]: With dead ends: 1620 [2021-11-21 01:22:18,005 INFO L226 Difference]: Without dead ends: 1105 [2021-11-21 01:22:18,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2021-11-21 01:22:18,007 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 235 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:22:18,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 1123 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:22:18,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-11-21 01:22:18,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 589. [2021-11-21 01:22:18,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 1.2670068027210883) internal successors, (745), 588 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:18,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 745 transitions. [2021-11-21 01:22:18,286 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 745 transitions. Word has length 89 [2021-11-21 01:22:18,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:22:18,286 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 745 transitions. [2021-11-21 01:22:18,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:18,287 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 745 transitions. [2021-11-21 01:22:18,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-21 01:22:18,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:22:18,289 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 01:22:18,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-21 01:22:18,290 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-21 01:22:18,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:22:18,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1943843904, now seen corresponding path program 1 times [2021-11-21 01:22:18,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:22:18,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099116863] [2021-11-21 01:22:18,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:22:18,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:22:18,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:22:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:22:20,150 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:22:20,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099116863] [2021-11-21 01:22:20,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099116863] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:22:20,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797659472] [2021-11-21 01:22:20,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:22:20,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:22:20,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:22:20,154 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:22:20,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fa6189-8ef2-4e00-9724-23cb67fc850d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:22:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:22:20,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-21 01:22:20,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:22:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:22:28,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:23:42,141 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:23:42,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797659472] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:23:42,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [682528719] [2021-11-21 01:23:42,166 INFO L159 IcfgInterpreter]: Started Sifa with 80 locations of interest [2021-11-21 01:23:42,166 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:23:42,172 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:23:42,179 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:23:42,179 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:23:42,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:23:42,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:23:42,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-21 01:23:43,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:43,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:43,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:43,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16