./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa034b6f-af88-4319-bf5f-060b797ce61a/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa034b6f-af88-4319-bf5f-060b797ce61a/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa034b6f-af88-4319-bf5f-060b797ce61a/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa034b6f-af88-4319-bf5f-060b797ce61a/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa034b6f-af88-4319-bf5f-060b797ce61a/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa034b6f-af88-4319-bf5f-060b797ce61a/bin/utaipan-eEHZpOm5b7 --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 7de925c132a7c7e17dbaa287f5760b6cfcdaa30e9bf1eb8266d373ba54e5d2bb --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:35:21,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:35:21,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:35:21,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:35:21,811 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:35:21,812 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:35:21,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:35:21,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:35:21,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:35:21,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:35:21,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:35:21,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:35:21,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:35:21,824 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:35:21,826 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:35:21,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:35:21,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:35:21,829 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:35:21,831 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:35:21,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:35:21,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:35:21,837 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:35:21,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:35:21,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:35:21,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:35:21,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:35:21,844 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:35:21,846 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:35:21,846 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:35:21,847 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:35:21,848 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:35:21,849 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:35:21,850 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:35:21,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:35:21,852 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:35:21,852 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:35:21,853 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:35:21,853 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:35:21,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:35:21,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:35:21,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:35:21,856 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa034b6f-af88-4319-bf5f-060b797ce61a/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:35:21,882 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:35:21,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:35:21,883 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:35:21,883 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:35:21,884 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:35:21,884 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:35:21,884 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:35:21,884 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:35:21,885 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:35:21,885 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:35:21,885 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:35:21,885 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:35:21,886 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:35:21,886 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:35:21,890 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:35:21,890 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:35:21,891 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:35:21,891 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:35:21,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:35:21,892 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:35:21,892 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:35:21,892 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:35:21,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:35:21,893 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:35:21,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:35:21,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:35:21,895 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:35:21,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:35:21,896 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:35:21,896 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:35:21,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:35:21,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:35:21,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:35:21,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:35:21,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:35:21,898 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:35:21,899 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:35:21,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:35:21,900 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:35:21,900 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:35:21,900 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:35:21,900 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_fa034b6f-af88-4319-bf5f-060b797ce61a/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa034b6f-af88-4319-bf5f-060b797ce61a/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7de925c132a7c7e17dbaa287f5760b6cfcdaa30e9bf1eb8266d373ba54e5d2bb [2021-11-25 20:35:22,205 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:35:22,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:35:22,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:35:22,230 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:35:22,231 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:35:22,232 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa034b6f-af88-4319-bf5f-060b797ce61a/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2021-11-25 20:35:22,314 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa034b6f-af88-4319-bf5f-060b797ce61a/bin/utaipan-eEHZpOm5b7/data/4f7410b07/f7501313745848d5a38907d40b12603d/FLAGb955bb291 [2021-11-25 20:35:23,048 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:35:23,052 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa034b6f-af88-4319-bf5f-060b797ce61a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2021-11-25 20:35:23,086 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa034b6f-af88-4319-bf5f-060b797ce61a/bin/utaipan-eEHZpOm5b7/data/4f7410b07/f7501313745848d5a38907d40b12603d/FLAGb955bb291 [2021-11-25 20:35:23,198 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa034b6f-af88-4319-bf5f-060b797ce61a/bin/utaipan-eEHZpOm5b7/data/4f7410b07/f7501313745848d5a38907d40b12603d [2021-11-25 20:35:23,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:35:23,207 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:35:23,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:35:23,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:35:23,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:35:23,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:35:23" (1/1) ... [2021-11-25 20:35:23,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@792075ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:35:23, skipping insertion in model container [2021-11-25 20:35:23,216 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:35:23" (1/1) ... [2021-11-25 20:35:23,224 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:35:23,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:35:24,173 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_fa034b6f-af88-4319-bf5f-060b797ce61a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[34952,34965] [2021-11-25 20:35:24,199 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_fa034b6f-af88-4319-bf5f-060b797ce61a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[35842,35855] [2021-11-25 20:35:24,236 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_fa034b6f-af88-4319-bf5f-060b797ce61a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[37629,37642] [2021-11-25 20:35:24,267 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_fa034b6f-af88-4319-bf5f-060b797ce61a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[38987,39000] [2021-11-25 20:35:24,446 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_fa034b6f-af88-4319-bf5f-060b797ce61a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[53558,53571] [2021-11-25 20:35:24,615 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_fa034b6f-af88-4319-bf5f-060b797ce61a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[62798,62811] [2021-11-25 20:35:24,636 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_fa034b6f-af88-4319-bf5f-060b797ce61a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[63691,63704] [2021-11-25 20:35:24,673 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_fa034b6f-af88-4319-bf5f-060b797ce61a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[65481,65494] [2021-11-25 20:35:24,694 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_fa034b6f-af88-4319-bf5f-060b797ce61a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[66374,66387] [2021-11-25 20:35:24,743 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_fa034b6f-af88-4319-bf5f-060b797ce61a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[69061,69074] [2021-11-25 20:35:24,765 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_fa034b6f-af88-4319-bf5f-060b797ce61a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[69954,69967] [2021-11-25 20:35:24,799 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_fa034b6f-af88-4319-bf5f-060b797ce61a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[71744,71757] [2021-11-25 20:35:24,910 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:35:24,922 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:35:25,233 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_fa034b6f-af88-4319-bf5f-060b797ce61a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[34952,34965] [2021-11-25 20:35:25,260 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_fa034b6f-af88-4319-bf5f-060b797ce61a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[35842,35855] [2021-11-25 20:35:25,291 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_fa034b6f-af88-4319-bf5f-060b797ce61a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[37629,37642] [2021-11-25 20:35:25,317 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_fa034b6f-af88-4319-bf5f-060b797ce61a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[38987,39000] [2021-11-25 20:35:25,488 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_fa034b6f-af88-4319-bf5f-060b797ce61a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[53558,53571] [2021-11-25 20:35:25,627 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_fa034b6f-af88-4319-bf5f-060b797ce61a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[62798,62811] [2021-11-25 20:35:25,648 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_fa034b6f-af88-4319-bf5f-060b797ce61a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[63691,63704] [2021-11-25 20:35:25,677 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_fa034b6f-af88-4319-bf5f-060b797ce61a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[65481,65494] [2021-11-25 20:35:25,694 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_fa034b6f-af88-4319-bf5f-060b797ce61a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[66374,66387] [2021-11-25 20:35:25,733 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_fa034b6f-af88-4319-bf5f-060b797ce61a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[69061,69074] [2021-11-25 20:35:25,752 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_fa034b6f-af88-4319-bf5f-060b797ce61a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[69954,69967] [2021-11-25 20:35:25,782 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_fa034b6f-af88-4319-bf5f-060b797ce61a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[71744,71757] [2021-11-25 20:35:25,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:35:25,871 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:35:25,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:35:25 WrapperNode [2021-11-25 20:35:25,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:35:25,873 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:35:25,873 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:35:25,873 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:35:25,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:35:25" (1/1) ... [2021-11-25 20:35:25,935 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:35:25" (1/1) ... [2021-11-25 20:35:26,045 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 4114 [2021-11-25 20:35:26,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:35:26,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:35:26,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:35:26,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:35:26,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:35:25" (1/1) ... [2021-11-25 20:35:26,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:35:25" (1/1) ... [2021-11-25 20:35:26,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:35:25" (1/1) ... [2021-11-25 20:35:26,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:35:25" (1/1) ... [2021-11-25 20:35:26,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:35:25" (1/1) ... [2021-11-25 20:35:26,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:35:25" (1/1) ... [2021-11-25 20:35:26,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:35:25" (1/1) ... [2021-11-25 20:35:26,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:35:26,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:35:26,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:35:26,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:35:26,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:35:25" (1/1) ... [2021-11-25 20:35:26,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:35:26,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa034b6f-af88-4319-bf5f-060b797ce61a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:35:26,175 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa034b6f-af88-4319-bf5f-060b797ce61a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:35:26,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa034b6f-af88-4319-bf5f-060b797ce61a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:35:26,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:35:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:35:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:35:26,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:35:26,510 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:35:26,513 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:35:29,051 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:35:30,100 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:35:30,100 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 20:35:30,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:35:30 BoogieIcfgContainer [2021-11-25 20:35:30,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:35:30,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:35:30,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:35:30,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:35:30,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:35:23" (1/3) ... [2021-11-25 20:35:30,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@555daf51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:35:30, skipping insertion in model container [2021-11-25 20:35:30,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:35:25" (2/3) ... [2021-11-25 20:35:30,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@555daf51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:35:30, skipping insertion in model container [2021-11-25 20:35:30,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:35:30" (3/3) ... [2021-11-25 20:35:30,118 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2021-11-25 20:35:30,123 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:35:30,124 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2021-11-25 20:35:30,188 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:35:30,195 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 [2021-11-25 20:35:30,196 INFO L340 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2021-11-25 20:35:30,237 INFO L276 IsEmpty]: Start isEmpty. Operand has 755 states, 742 states have (on average 1.761455525606469) internal successors, (1307), 754 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:30,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-25 20:35:30,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:35:30,269 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:35:30,269 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-25 20:35:30,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:35:30,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1257271320, now seen corresponding path program 1 times [2021-11-25 20:35:30,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:35:30,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805345153] [2021-11-25 20:35:30,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:35:30,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:35:31,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:35:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:35:31,686 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:35:31,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805345153] [2021-11-25 20:35:31,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805345153] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:35:31,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:35:31,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:35:31,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665921515] [2021-11-25 20:35:31,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:35:31,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:35:31,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:35:31,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:35:31,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:35:31,741 INFO L87 Difference]: Start difference. First operand has 755 states, 742 states have (on average 1.761455525606469) internal successors, (1307), 754 states have internal predecessors, (1307), 0 states have call successors, (0), 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 4 states, 4 states have (on average 66.25) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:32,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:35:32,277 INFO L93 Difference]: Finished difference Result 2229 states and 3862 transitions. [2021-11-25 20:35:32,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:35:32,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 265 [2021-11-25 20:35:32,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:35:32,309 INFO L225 Difference]: With dead ends: 2229 [2021-11-25 20:35:32,309 INFO L226 Difference]: Without dead ends: 1479 [2021-11-25 20:35:32,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:35:32,328 INFO L933 BasicCegarLoop]: 1950 mSDtfsCounter, 2948 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2948 SdHoareTripleChecker+Valid, 3129 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:35:32,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2948 Valid, 3129 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:35:32,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2021-11-25 20:35:32,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 1418. [2021-11-25 20:35:32,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1406 states have (on average 1.4139402560455192) internal successors, (1988), 1417 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:32,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 1988 transitions. [2021-11-25 20:35:32,468 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 1988 transitions. Word has length 265 [2021-11-25 20:35:32,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:35:32,470 INFO L470 AbstractCegarLoop]: Abstraction has 1418 states and 1988 transitions. [2021-11-25 20:35:32,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:32,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 1988 transitions. [2021-11-25 20:35:32,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-25 20:35:32,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:35:32,484 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:35:32,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:35:32,489 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-25 20:35:32,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:35:32,491 INFO L85 PathProgramCache]: Analyzing trace with hash -700623482, now seen corresponding path program 1 times [2021-11-25 20:35:32,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:35:32,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535692764] [2021-11-25 20:35:32,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:35:32,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:35:32,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:35:32,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:35:32,761 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:35:32,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535692764] [2021-11-25 20:35:32,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535692764] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:35:32,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:35:32,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:35:32,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950174215] [2021-11-25 20:35:32,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:35:32,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:35:32,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:35:32,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:35:32,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:35:32,770 INFO L87 Difference]: Start difference. First operand 1418 states and 1988 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:33,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:35:33,211 INFO L93 Difference]: Finished difference Result 4085 states and 5698 transitions. [2021-11-25 20:35:33,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:35:33,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 267 [2021-11-25 20:35:33,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:35:33,234 INFO L225 Difference]: With dead ends: 4085 [2021-11-25 20:35:33,235 INFO L226 Difference]: Without dead ends: 2788 [2021-11-25 20:35:33,237 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 [2021-11-25 20:35:33,239 INFO L933 BasicCegarLoop]: 1927 mSDtfsCounter, 920 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 2874 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:35:33,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [920 Valid, 2874 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:35:33,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2788 states. [2021-11-25 20:35:33,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2788 to 2727. [2021-11-25 20:35:33,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2715 states have (on average 1.412891344383057) internal successors, (3836), 2726 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:33,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 3836 transitions. [2021-11-25 20:35:33,378 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 3836 transitions. Word has length 267 [2021-11-25 20:35:33,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:35:33,381 INFO L470 AbstractCegarLoop]: Abstraction has 2727 states and 3836 transitions. [2021-11-25 20:35:33,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:33,382 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 3836 transitions. [2021-11-25 20:35:33,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-25 20:35:33,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:35:33,390 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:35:33,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:35:33,391 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-25 20:35:33,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:35:33,391 INFO L85 PathProgramCache]: Analyzing trace with hash -394427642, now seen corresponding path program 1 times [2021-11-25 20:35:33,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:35:33,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920077354] [2021-11-25 20:35:33,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:35:33,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:35:33,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:35:33,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:35:33,528 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:35:33,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920077354] [2021-11-25 20:35:33,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920077354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:35:33,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:35:33,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:35:33,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364475075] [2021-11-25 20:35:33,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:35:33,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:35:33,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:35:33,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:35:33,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:35:33,531 INFO L87 Difference]: Start difference. First operand 2727 states and 3836 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:34,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:35:34,064 INFO L93 Difference]: Finished difference Result 8029 states and 11275 transitions. [2021-11-25 20:35:34,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:35:34,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 267 [2021-11-25 20:35:34,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:35:34,096 INFO L225 Difference]: With dead ends: 8029 [2021-11-25 20:35:34,097 INFO L226 Difference]: Without dead ends: 5434 [2021-11-25 20:35:34,103 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 [2021-11-25 20:35:34,106 INFO L933 BasicCegarLoop]: 1970 mSDtfsCounter, 1037 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 2953 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:35:34,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1037 Valid, 2953 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:35:34,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5434 states. [2021-11-25 20:35:34,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5434 to 2730. [2021-11-25 20:35:34,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2730 states, 2718 states have (on average 1.4124356144223693) internal successors, (3839), 2729 states have internal predecessors, (3839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2730 states to 2730 states and 3839 transitions. [2021-11-25 20:35:34,338 INFO L78 Accepts]: Start accepts. Automaton has 2730 states and 3839 transitions. Word has length 267 [2021-11-25 20:35:34,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:35:34,339 INFO L470 AbstractCegarLoop]: Abstraction has 2730 states and 3839 transitions. [2021-11-25 20:35:34,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:34,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2730 states and 3839 transitions. [2021-11-25 20:35:34,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-11-25 20:35:34,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:35:34,348 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:35:34,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:35:34,349 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-25 20:35:34,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:35:34,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1566339121, now seen corresponding path program 1 times [2021-11-25 20:35:34,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:35:34,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814839489] [2021-11-25 20:35:34,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:35:34,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:35:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:35:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:35:35,075 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:35:35,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814839489] [2021-11-25 20:35:35,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814839489] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:35:35,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:35:35,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:35:35,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434234237] [2021-11-25 20:35:35,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:35:35,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:35:35,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:35:35,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:35:35,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:35:35,081 INFO L87 Difference]: Start difference. First operand 2730 states and 3839 transitions. Second operand has 5 states, 5 states have (on average 53.6) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:35,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:35:35,711 INFO L93 Difference]: Finished difference Result 7956 states and 11156 transitions. [2021-11-25 20:35:35,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:35:35,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.6) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 268 [2021-11-25 20:35:35,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:35:35,741 INFO L225 Difference]: With dead ends: 7956 [2021-11-25 20:35:35,741 INFO L226 Difference]: Without dead ends: 5241 [2021-11-25 20:35:35,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:35:35,748 INFO L933 BasicCegarLoop]: 1543 mSDtfsCounter, 3390 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3390 SdHoareTripleChecker+Valid, 2480 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:35:35,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3390 Valid, 2480 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:35:35,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5241 states. [2021-11-25 20:35:36,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5241 to 5180. [2021-11-25 20:35:36,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5180 states, 5168 states have (on average 1.4028637770897834) internal successors, (7250), 5179 states have internal predecessors, (7250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:36,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5180 states to 5180 states and 7250 transitions. [2021-11-25 20:35:36,081 INFO L78 Accepts]: Start accepts. Automaton has 5180 states and 7250 transitions. Word has length 268 [2021-11-25 20:35:36,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:35:36,083 INFO L470 AbstractCegarLoop]: Abstraction has 5180 states and 7250 transitions. [2021-11-25 20:35:36,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.6) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:36,084 INFO L276 IsEmpty]: Start isEmpty. Operand 5180 states and 7250 transitions. [2021-11-25 20:35:36,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-25 20:35:36,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:35:36,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:35:36,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:35:36,098 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-25 20:35:36,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:35:36,099 INFO L85 PathProgramCache]: Analyzing trace with hash 13605357, now seen corresponding path program 1 times [2021-11-25 20:35:36,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:35:36,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949157431] [2021-11-25 20:35:36,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:35:36,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:35:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:35:36,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:35:36,640 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:35:36,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949157431] [2021-11-25 20:35:36,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949157431] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:35:36,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:35:36,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:35:36,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551402361] [2021-11-25 20:35:36,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:35:36,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:35:36,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:35:36,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:35:36,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:35:36,645 INFO L87 Difference]: Start difference. First operand 5180 states and 7250 transitions. Second operand has 4 states, 4 states have (on average 67.25) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:37,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:35:37,498 INFO L93 Difference]: Finished difference Result 15184 states and 21201 transitions. [2021-11-25 20:35:37,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:35:37,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 269 [2021-11-25 20:35:37,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:35:37,563 INFO L225 Difference]: With dead ends: 15184 [2021-11-25 20:35:37,563 INFO L226 Difference]: Without dead ends: 10142 [2021-11-25 20:35:37,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:35:37,573 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 2351 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2351 SdHoareTripleChecker+Valid, 2475 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:35:37,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2351 Valid, 2475 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:35:37,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10142 states. [2021-11-25 20:35:38,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10142 to 10081. [2021-11-25 20:35:38,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10081 states, 10069 states have (on average 1.395173304201013) internal successors, (14048), 10080 states have internal predecessors, (14048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:38,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10081 states to 10081 states and 14048 transitions. [2021-11-25 20:35:38,276 INFO L78 Accepts]: Start accepts. Automaton has 10081 states and 14048 transitions. Word has length 269 [2021-11-25 20:35:38,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:35:38,277 INFO L470 AbstractCegarLoop]: Abstraction has 10081 states and 14048 transitions. [2021-11-25 20:35:38,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:38,278 INFO L276 IsEmpty]: Start isEmpty. Operand 10081 states and 14048 transitions. [2021-11-25 20:35:38,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-11-25 20:35:38,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:35:38,304 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:35:38,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:35:38,304 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-25 20:35:38,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:35:38,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1878182451, now seen corresponding path program 1 times [2021-11-25 20:35:38,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:35:38,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661115538] [2021-11-25 20:35:38,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:35:38,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:35:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:35:38,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:35:38,763 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:35:38,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661115538] [2021-11-25 20:35:38,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661115538] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:35:38,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:35:38,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:35:38,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762432191] [2021-11-25 20:35:38,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:35:38,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:35:38,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:35:38,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:35:38,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:35:38,766 INFO L87 Difference]: Start difference. First operand 10081 states and 14048 transitions. Second operand has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:40,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:35:40,143 INFO L93 Difference]: Finished difference Result 29639 states and 41207 transitions. [2021-11-25 20:35:40,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:35:40,144 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2021-11-25 20:35:40,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:35:40,197 INFO L225 Difference]: With dead ends: 29639 [2021-11-25 20:35:40,197 INFO L226 Difference]: Without dead ends: 19700 [2021-11-25 20:35:40,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:35:40,213 INFO L933 BasicCegarLoop]: 1365 mSDtfsCounter, 2490 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2490 SdHoareTripleChecker+Valid, 2298 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:35:40,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2490 Valid, 2298 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:35:40,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19700 states. [2021-11-25 20:35:41,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19700 to 19639. [2021-11-25 20:35:41,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19639 states, 19627 states have (on average 1.384877974219188) internal successors, (27181), 19638 states have internal predecessors, (27181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:41,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19639 states to 19639 states and 27181 transitions. [2021-11-25 20:35:41,316 INFO L78 Accepts]: Start accepts. Automaton has 19639 states and 27181 transitions. Word has length 271 [2021-11-25 20:35:41,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:35:41,317 INFO L470 AbstractCegarLoop]: Abstraction has 19639 states and 27181 transitions. [2021-11-25 20:35:41,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:41,318 INFO L276 IsEmpty]: Start isEmpty. Operand 19639 states and 27181 transitions. [2021-11-25 20:35:41,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-25 20:35:41,355 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:35:41,355 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:35:41,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:35:41,356 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-25 20:35:41,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:35:41,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1216456193, now seen corresponding path program 1 times [2021-11-25 20:35:41,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:35:41,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829960631] [2021-11-25 20:35:41,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:35:41,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:35:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:35:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:35:41,444 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:35:41,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829960631] [2021-11-25 20:35:41,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829960631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:35:41,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:35:41,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:35:41,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36438473] [2021-11-25 20:35:41,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:35:41,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:35:41,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:35:41,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:35:41,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:35:41,447 INFO L87 Difference]: Start difference. First operand 19639 states and 27181 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:43,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:35:43,241 INFO L93 Difference]: Finished difference Result 58537 states and 80989 transitions. [2021-11-25 20:35:43,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:35:43,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 273 [2021-11-25 20:35:43,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:35:43,348 INFO L225 Difference]: With dead ends: 58537 [2021-11-25 20:35:43,348 INFO L226 Difference]: Without dead ends: 39121 [2021-11-25 20:35:43,384 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 [2021-11-25 20:35:43,385 INFO L933 BasicCegarLoop]: 1949 mSDtfsCounter, 1013 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1013 SdHoareTripleChecker+Valid, 2932 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:35:43,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1013 Valid, 2932 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:35:43,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39121 states. [2021-11-25 20:35:44,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39121 to 19672. [2021-11-25 20:35:44,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19672 states, 19660 states have (on average 1.3842319430315362) internal successors, (27214), 19671 states have internal predecessors, (27214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19672 states to 19672 states and 27214 transitions. [2021-11-25 20:35:44,672 INFO L78 Accepts]: Start accepts. Automaton has 19672 states and 27214 transitions. Word has length 273 [2021-11-25 20:35:44,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:35:44,672 INFO L470 AbstractCegarLoop]: Abstraction has 19672 states and 27214 transitions. [2021-11-25 20:35:44,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:44,673 INFO L276 IsEmpty]: Start isEmpty. Operand 19672 states and 27214 transitions. [2021-11-25 20:35:44,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-25 20:35:44,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:35:44,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:35:44,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 20:35:44,710 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-25 20:35:44,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:35:44,711 INFO L85 PathProgramCache]: Analyzing trace with hash 533226072, now seen corresponding path program 1 times [2021-11-25 20:35:44,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:35:44,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83079532] [2021-11-25 20:35:44,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:35:44,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:35:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:35:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:35:44,844 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:35:44,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83079532] [2021-11-25 20:35:44,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83079532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:35:44,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:35:44,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:35:44,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28955534] [2021-11-25 20:35:44,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:35:44,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:35:44,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:35:44,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:35:44,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:35:44,847 INFO L87 Difference]: Start difference. First operand 19672 states and 27214 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:46,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:35:46,572 INFO L93 Difference]: Finished difference Result 56617 states and 77969 transitions. [2021-11-25 20:35:46,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:35:46,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 273 [2021-11-25 20:35:46,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:35:46,657 INFO L225 Difference]: With dead ends: 56617 [2021-11-25 20:35:46,658 INFO L226 Difference]: Without dead ends: 38540 [2021-11-25 20:35:46,690 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 [2021-11-25 20:35:46,690 INFO L933 BasicCegarLoop]: 1906 mSDtfsCounter, 903 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 2853 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:35:46,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [903 Valid, 2853 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:35:46,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38540 states. [2021-11-25 20:35:48,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38540 to 38479. [2021-11-25 20:35:48,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38479 states, 38467 states have (on average 1.3768944809837003) internal successors, (52965), 38478 states have internal predecessors, (52965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:48,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38479 states to 38479 states and 52965 transitions. [2021-11-25 20:35:48,652 INFO L78 Accepts]: Start accepts. Automaton has 38479 states and 52965 transitions. Word has length 273 [2021-11-25 20:35:48,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:35:48,652 INFO L470 AbstractCegarLoop]: Abstraction has 38479 states and 52965 transitions. [2021-11-25 20:35:48,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:48,653 INFO L276 IsEmpty]: Start isEmpty. Operand 38479 states and 52965 transitions. [2021-11-25 20:35:48,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-25 20:35:48,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:35:48,738 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:35:48,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:35:48,738 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-25 20:35:48,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:35:48,739 INFO L85 PathProgramCache]: Analyzing trace with hash -617898476, now seen corresponding path program 1 times [2021-11-25 20:35:48,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:35:48,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36561238] [2021-11-25 20:35:48,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:35:48,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:35:48,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:35:48,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:35:48,856 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:35:48,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36561238] [2021-11-25 20:35:48,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36561238] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:35:48,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:35:48,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:35:48,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980068399] [2021-11-25 20:35:48,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:35:48,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:35:48,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:35:48,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:35:48,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:35:48,859 INFO L87 Difference]: Start difference. First operand 38479 states and 52965 transitions. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 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) [2021-11-25 20:35:51,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:35:51,763 INFO L93 Difference]: Finished difference Result 79246 states and 111004 transitions. [2021-11-25 20:35:51,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:35:51,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 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) Word has length 274 [2021-11-25 20:35:51,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:35:51,852 INFO L225 Difference]: With dead ends: 79246 [2021-11-25 20:35:51,852 INFO L226 Difference]: Without dead ends: 50961 [2021-11-25 20:35:51,881 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 [2021-11-25 20:35:51,883 INFO L933 BasicCegarLoop]: 1301 mSDtfsCounter, 511 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 2069 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:35:51,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 2069 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:35:51,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50961 states. [2021-11-25 20:35:54,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50961 to 43919. [2021-11-25 20:35:54,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43919 states, 43907 states have (on average 1.4016216093105882) internal successors, (61541), 43918 states have internal predecessors, (61541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:54,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43919 states to 43919 states and 61541 transitions. [2021-11-25 20:35:54,245 INFO L78 Accepts]: Start accepts. Automaton has 43919 states and 61541 transitions. Word has length 274 [2021-11-25 20:35:54,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:35:54,246 INFO L470 AbstractCegarLoop]: Abstraction has 43919 states and 61541 transitions. [2021-11-25 20:35:54,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 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) [2021-11-25 20:35:54,246 INFO L276 IsEmpty]: Start isEmpty. Operand 43919 states and 61541 transitions. [2021-11-25 20:35:54,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-25 20:35:54,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:35:54,288 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:35:54,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:35:54,289 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-25 20:35:54,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:35:54,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1366686624, now seen corresponding path program 1 times [2021-11-25 20:35:54,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:35:54,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741879566] [2021-11-25 20:35:54,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:35:54,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:35:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:35:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:35:54,735 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:35:54,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741879566] [2021-11-25 20:35:54,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741879566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:35:54,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:35:54,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:35:54,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847089026] [2021-11-25 20:35:54,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:35:54,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:35:54,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:35:54,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:35:54,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:35:54,738 INFO L87 Difference]: Start difference. First operand 43919 states and 61541 transitions. Second operand has 5 states, 5 states have (on average 54.8) internal successors, (274), 4 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) [2021-11-25 20:35:59,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:35:59,116 INFO L93 Difference]: Finished difference Result 128280 states and 179454 transitions. [2021-11-25 20:35:59,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:35:59,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 54.8) internal successors, (274), 4 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) Word has length 274 [2021-11-25 20:35:59,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:35:59,233 INFO L225 Difference]: With dead ends: 128280 [2021-11-25 20:35:59,233 INFO L226 Difference]: Without dead ends: 84561 [2021-11-25 20:35:59,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:35:59,271 INFO L933 BasicCegarLoop]: 1671 mSDtfsCounter, 3199 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3199 SdHoareTripleChecker+Valid, 2610 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:35:59,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3199 Valid, 2610 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:35:59,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84561 states. [2021-11-25 20:36:03,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84561 to 84500. [2021-11-25 20:36:03,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84500 states, 84488 states have (on average 1.3927184925669918) internal successors, (117668), 84499 states have internal predecessors, (117668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:36:03,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84500 states to 84500 states and 117668 transitions. [2021-11-25 20:36:03,887 INFO L78 Accepts]: Start accepts. Automaton has 84500 states and 117668 transitions. Word has length 274 [2021-11-25 20:36:03,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:36:03,887 INFO L470 AbstractCegarLoop]: Abstraction has 84500 states and 117668 transitions. [2021-11-25 20:36:03,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.8) internal successors, (274), 4 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) [2021-11-25 20:36:03,888 INFO L276 IsEmpty]: Start isEmpty. Operand 84500 states and 117668 transitions. [2021-11-25 20:36:04,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-11-25 20:36:04,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:36:04,252 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:36:04,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 20:36:04,254 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-25 20:36:04,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:36:04,254 INFO L85 PathProgramCache]: Analyzing trace with hash 604950431, now seen corresponding path program 1 times [2021-11-25 20:36:04,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:36:04,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458996841] [2021-11-25 20:36:04,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:36:04,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:36:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:36:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:36:04,718 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:36:04,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458996841] [2021-11-25 20:36:04,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458996841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:36:04,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:36:04,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:36:04,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179659720] [2021-11-25 20:36:04,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:36:04,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:36:04,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:36:04,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:36:04,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:36:04,721 INFO L87 Difference]: Start difference. First operand 84500 states and 117668 transitions. Second operand has 4 states, 4 states have (on average 68.75) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:36:13,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:36:13,243 INFO L93 Difference]: Finished difference Result 245404 states and 340606 transitions. [2021-11-25 20:36:13,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:36:13,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 68.75) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 275 [2021-11-25 20:36:13,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:36:13,503 INFO L225 Difference]: With dead ends: 245404 [2021-11-25 20:36:13,503 INFO L226 Difference]: Without dead ends: 163168 [2021-11-25 20:36:13,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:36:13,584 INFO L933 BasicCegarLoop]: 1669 mSDtfsCounter, 2181 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2181 SdHoareTripleChecker+Valid, 2612 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:36:13,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2181 Valid, 2612 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:36:13,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163168 states.